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| TW2835 4 Channel Video and Audio Controller For Security Applications Preliminary Data Sheet from Techwell, Inc. Information may change without notice Disclaimer This document provides technical information for the user. Techwell Inc. reserves the right to modify the information in this document as necessary. The customer should make sure that they have the most recent data sheet version. Techwell Inc. holds no responsibility for any errors that may appear in this document. Customers should take appropriate action to ensure their use of the products does not infringe upon any patents. Techwell Inc. respects valid patent rights of third parties and does not infringe upon or assist others to infringe upon such rights. Techwell, Inc. www.techwellinc.com Oct, 10, 2006 Datasheet Rev. 1.2 1 www.DataSheet.in TW2835 Video and Audio Controller Table of Contents Preliminary Introduction........................................................................................................................................... 5 Features ............................................................................................................................................. 5 Applications ...................................................................................................................................... 6 Block Diagram .................................................................................................................................. 7 Pin Description ................................................................................................................................. 8 Pin Diagram .................................................................................................................................... 15 Functional Description ....................................................................................................................... 17 Video Input ..................................................................................................................................... 17 Analog Video Input ...................................................................................................................... 18 Anti-aliasing Filter ................................................................................................................... 19 Analog-to-Digital Converter .................................................................................................... 19 Sync Processing........................................................................................................................ 20 Color Decoding ........................................................................................................................ 21 Luminance Processing.............................................................................................................. 23 Chrominance Processing .......................................................................................................... 24 Realtime Record Mode............................................................................................................. 25 Digital Video Input....................................................................................................................... 26 Digital Video Input Format ...................................................................................................... 26 Channel ID Decoder ................................................................................................................. 27 Cropping and Scaling Function .................................................................................................... 29 Cropping Function for Live...................................................................................................... 29 Scaling Function for Live......................................................................................................... 30 Cropping and Scaling Function for Playback........................................................................... 34 Motion Detection ............................................................................................................................ 36 Mask and Detection Region Selection ......................................................................................... 37 Sensitivity Control ....................................................................................................................... 38 Level Sensitivity....................................................................................................................... 38 Spatial Sensitivity..................................................................................................................... 38 Temporal Sensitivity ................................................................................................................ 38 Velocity Control ........................................................................................................................... 39 Blind Detection ............................................................................................................................ 41 Night Detection ............................................................................................................................ 41 Video Control ................................................................................................................................. 42 Channel Input Selection ............................................................................................................... 43 Channel Operation Mode ............................................................................................................. 44 Techwell, Inc. www.techwellinc.com 2 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Live Mode ................................................................................................................................ 44 Strobe Mode ............................................................................................................................. 45 Switch Mode............................................................................................................................. 47 Channel Attribute ......................................................................................................................... 51 Background Control ................................................................................................................. 51 Boundary Control ..................................................................................................................... 51 Blank Control ........................................................................................................................... 51 Freeze Control .......................................................................................................................... 51 Last Image Captured ................................................................................................................ 52 Horizontal / Vertical Mirroring ................................................................................................ 52 Field to Frame Conversion ....................................................................................................... 52 Display Path Control .................................................................................................................... 53 Save and Recall Function ......................................................................................................... 53 Image Enhancement ................................................................................................................. 54 Zoom Function ......................................................................................................................... 54 Picture Size and Popup Control................................................................................................ 55 Full Triplex Function................................................................................................................ 56 Playback Path Control .................................................................................................................. 57 Frame Record Mode ................................................................................................................. 59 DVR Normal Record Mode...................................................................................................... 61 DVR Frame Record Mode........................................................................................................ 62 Record Path Control ..................................................................................................................... 64 Normal Record Mode ............................................................................................................... 65 Frame Record Mode ................................................................................................................. 66 DVR Normal Record Mode...................................................................................................... 67 DVR Frame Record Mode........................................................................................................ 68 Noise Reduction ....................................................................................................................... 69 Channel ID Encoder ..................................................................................................................... 70 Channel ID Information ........................................................................................................... 70 Analog Type Channel ID in VBI.............................................................................................. 73 Digital Type Channel ID in VBI .............................................................................................. 74 Digital Type Channel ID in Channel Boundary ....................................................................... 75 Chip-to-Chip Cascade Operation ................................................................................................. 76 Channel Priority Control .......................................................................................................... 76 120 CIF/Sec Record Mode ....................................................................................................... 78 240 CIF/Sec Record Mode ....................................................................................................... 79 480 CIF/Sec Record Mode ....................................................................................................... 80 Infinite Cascade Mode for Display Path .................................................................................. 81 OSD (On Screen Display) Control ............................................................................................... 82 2 Dimensional Arrayed Box ..................................................................................................... 83 Bitmap Overlay ........................................................................................................................ 85 Techwell, Inc. www.techwellinc.com 3 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Single Box ................................................................................................................................ 89 Mouse Pointer........................................................................................................................... 89 Video Output .................................................................................................................................. 90 Timing Interface and Control ....................................................................................................... 91 Analog Video Output ................................................................................................................... 93 Output Standard Selection........................................................................................................ 93 Luminance Filter ...................................................................................................................... 94 Chrominance Filter................................................................................................................... 94 Digital-to-Analog Converter .................................................................................................... 95 Digital Video Output .................................................................................................................... 96 Single Output Mode ................................................................................................................. 97 Dual Output Mode.................................................................................................................... 98 Audio CODEC ................................................................................................................................ 99 Multi-Chip Operation ................................................................................................................. 100 Serial Audio Interface ................................................................................................................ 102 Analog Audio Output ................................................................................................................. 105 Host Interface.................................................................................................................................... 106 Serial Interface ............................................................................................................................. 107 Parallel Interface.......................................................................................................................... 109 Interrupt Interface ....................................................................................................................... 111 MPP Pin Interface........................................................................................................................ 112 Control Register ........................................................................................................................... 113 Register Map .............................................................................................................................. 113 Recommended Value.................................................................................................................. 122 Register Description................................................................................................................... 127 Parametric Information .................................................................................................................... 247 DC Electrical Parameters ............................................................................................................ 247 AC Electrical Parameters ............................................................................................................ 249 Application Schematic ...................................................................................................................... 253 Package Dimension........................................................................................................................... 254 Revision History ................................................................................................................................ 256 Techwell, Inc. www.techwellinc.com 4 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Introduction Preliminary The TW2835 has four high quality NTSC/PAL video decoders, dual color display controllers and dual video encoders. The TW2835 contains four built-in analog anti-aliasing filters, four 10bit Analog-to-Digital converters, and proprietary digital gain/clamp controller, high quality Y/C separator to reduce cross-noise and high performance free scaler. Four built-in motion, blind and night detectors can increase the feature of security system. The TW2835 has flexible video display/record/playback controller including basic display and MUX functions. The TW2835 also has excellent graphic overlay function that displays bitmap for OSD, single box, 2D array box, and mouse pointer. The built-in channel ID CODEC allows auto decoding and displaying during playback and the additional scaler on the playback supports multi-cropping function of the same field or frame image. The TW2835 contains two video encoders with three 10bit Digital-toAnalog converters to provide 2 composite or S-video. The TW2835 also includes audio CODEC that has four audio Analog-to-Digital converters and one Digital-to-Analog converter. A built-in audio controller can generate digital outputs for recording/mixing and accepts digital input for playback. The TW2835 can be extended up to 8/16 channel video controller using chip-to-chip cascade connection. Features Four Video Decoders Accepts all NTSC(M/N/4.43) / PAL(B/D/G/H/I/K/L/M/N/60) standards with auto detection Integrated four video analog anti-aliasing filters and 10 bit CMOS ADCs High performance adaptive 4H comb filters for all NTSC/PAL standards IF compensation filter for improvement of color demodulation Color Transient Improvement (CTI) Automatic white peak control Programmable hue, saturation, contrast, brightness and sharpness High performance horizontal and vertical scaler for each path including playback input Fast video locking system for non-realtime application Four built-in motion detectors with 16X12 cells and blind and night detectors Additional digital input for playback with ITU-R BT.656 standard Auto cropping / strobe for playback input with Channel ID decoder Supports four channel full D1 record mode Dual Video Controllers Support full triplex function with 4ch live, 4ch playback display and 4ch record output Analog/Digital channel ID CODEC for record and playback application Support adaptive median filter for Record Supports pseudo 8 channel and/or dual page mode Techwell, Inc. www.techwellinc.com 5 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Horizontal/Vertical mirroring for each channel Last image captured when video-loss detected Preliminary Auto sequence switch with 128 queues and/or manual switch by interrupt for record path Channel skip in auto sequence switch for record path when video-loss detected Image enhancement for zoomed or still image in display path High performance 2X zoom to horizontal and vertical direction for display path Extendable up to 8/16 channel video controller using cascade connection Quad MUX switch with 32 queues and/or manual control by interrupt for record path 64 color bitmap OSD overlay with 720x480 in NTSC / 720x588 resolution in PAL Four programmable single boxes and four 2D arrayed boxes overlay Mouse pointer overlay Dual Video Encoders Dual path digital outputs with ITU-R BT.656 standard Dual path analog outputs with all analog NTSC/PAL standards Programmable bandwidth of luminance and chrominance signal for each path Three 10bit video CMOS DACs Audio CODEC Integrated four audio ADCs and one audio DAC Provides multi-channel audio mixed analog output Supports a standard I2S interface for record output and playback input 8/16 bit audio word length Sample audio with 8/16KHz Applications Analog QUAD/MUX System 4/8/16 Channel DVR System Car Rear Vision System Hair Shop System Dental Care System Techwell, Inc. www.techwellinc.com 6 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in 8x8 Matrix VIN1A Dual Scaler Motion Detect Dual Scaler Motion Detect Dual Scaler Motion Detect ADC Display Path Process Video Encoder II DAC VIN0B Motion Detect MUX MUX VIN1B VIN2A ADC VIN2B VIN3A ADC MUX Video Decoder Write/ Read Control ITU-R BT656 Encoder VDOX VDOY TW2835 Video and Audio Controller VIN3B ADC AIN2 ADC Decimation Filter Decimation Filter Interpolation Filter I2S Interface MPP Interface HOST Interface AIN3 DAC AOUT IRQ Interface Clock Generator DAC ADC AIN1 Decimation Filter 4x4 Matrix ADC AIN0 Decimation Filter MUX Video Decoder Record Path Process Video Encoder II VAOYY DAC www.DataSheet.in ADDR/BA/RASB/CASB/WENB/DQM/DATA Channel ID Decoder Playback Path Control Techwell, Inc. www.techwellinc.com Block Diagram PBCLK PBIN ITU-R BT656 Decoder Auto-Crop & Multi-Scaler Encoder Timing Interface HSENC VSENC FLDENC HLINKI VLINKI DLINKI VIN0A Video Decoder Dual Scaler ADC VAOYX Video Decoder VAOCX 7 ACLKR/ASYNR/ADATR/ADATM/ ACLKP/ASYNP/ADATP DLINKI/MPP1/2 HSPB/HCSB0,1/HALE/ HRDB/HWRB/HDAT CLKMPP1 CLKMPP2 CLKVDOX CLKVDOY Preliminary Datasheet Rev. 1.2 Oct, 10, 2006 IRQ CLK54I TW2835 Video and Audio Controller Pin Description Analog Interface Pins Name VIN0A VIN0B VIN1A VIN1B VIN2A VIN2B VIN3A VIN3B VAOYX VAOCX VAOYY NC AIN0 AIN1 AIN2 AIN3 AOUT Number QFP 166 167 170 171 176 177 180 181 184 186 189 191 197 198 199 200 194 LBGA B12 C12 B11 C11 B10 C10 B9 C9 C8 D8 C7 D7 B6 C6 B5 C5 D5 Type A A A A A A A A A A A A A A A A A Description Preliminary Composite video input A of channel 0. Composite video input B of channel 0. Composite video input A of channel 1. Composite video input B of channel 1. Composite video input A of channel 2. Composite video input B of channel 2. Composite video input A of channel 3. Composite video input B of channel 3. Analog video output. Analog video output. Analog video output. No connection. Audio input of channel 0. Audio input of channel 1. Audio input of channel 2. Audio input of channel 3. Audio mixing output. Techwell, Inc. www.techwellinc.com 8 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Digital Video Interface Pins Name Number QFP VDOX [7:0] 8,9, 10,11, 13,14, 15,16 33,34, 36,37, 38,39, 40,42 17 32 21 20 19 43,44, 45,46, 48,49, 50,51 54 LBGA C1,C2, D2,D3, E1,E2, E3,E4 J4,K2, K3,L1, L2,L3, L4,M1 F1 J3 F4 F3 F2 M2,M3, M4,N2, N3,P1, P2,R1 R2 O Type Description Preliminary Digital video data output for display path. Or link signal for multi-chip connection. VDOY [7:0] CLKVDOX CLKVDOY HSENC VSENC FLDENC PBDIN[7:0] PBCLK O O O O O O I I Digital video data output for record path. Clock output for VDOUTX. Clock output for VDOUTY.. Encoder horizontal sync. Encoder vertical sync. Or link signal for multi-chip connection. Encoder field flag. Video data of playback input. Clock of playback input. Techwell, Inc. www.techwellinc.com 9 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Multi-purpose Pins Name HLINKI VLINKI DLINKI[7:0] Number QFP 138 140 149,148, 147,146, 144,143, 142,141 204,205, 206,207, 2,3, 4,5 152,153, 154,155, 158,159, 160,161 7 150 LBGA F14 F13 C15,C16, D14,D15, E13,E14, E15,E16 A4,B4, C4,A3, B3,C3, A2,B2 B16,B15, A15,A14, B14,A13, B13,C13 B1 C14 I/O I I/O Type Description Preliminary Link signal for multi-chip connection. Link signal for multi-chip connection. Link signal for multi-chip connection. Or decoder's bypassed data output. Or decoder's timing signal output. Or general purpose input/output. Decoder's bypassed data output. Or decoder's timing signal output. Or general purpose input/output. Decoder's bypassed data output. Or decoder's timing signal output. Or general purpose input/output. Clock output for MPP1 data. Clock output for MPP2 data. MPP1[7:0] I/O MPP2[7:0] CLKMPP1 CLKMPP2 I/O O O Techwell, Inc. www.techwellinc.com 10 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Digital Audio Interface Pins Name ACLKR ASYNR ADATR ADATM ACLKP ASYNP ADATP ALINKI ALINKO Number QFP 27 26 25 23 31 30 28 137 22 LBGA H3 H2 H1 G3 J2 J1 H4 F15 G2 O O O O I/O I/O I I O Audio serial clock output of record. Audio serial sync output of record. Audio serial data output of record. Audio serial data output of mixing. Type Description Preliminary Audio serial clock input/output of playback. Audio serial sync input/output of playback. Audio serial data input of playback. Link signal for multi-chip connection. Link signal for multi-chip connection. Techwell, Inc. www.techwellinc.com 11 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Memory Interface Pins Name Number QFP 76,77, 78,79, 80,82, 83,84, 85,86, 88,89, 90,91, 92,94, 118,119, 120,121, 123,124, 125,126, 127,129, 130,131, 132,134, 135,136 95,96, 97,98, 100,101, 102,103, 106,107, 108 109 111 113 114 115 117 112 LBGA R8,P8, N8,T9, R9,P9, N9,R10, P10,T11, R11,P11, N11,T12, R12,P12, L15,L14, L13,K15, K14,J16, J15,J14, J13,H16, H15,H14, H13,G15, G14,F16 N12,R13, P13,T14, R14,P14, T15,R15, R16,P16, P15 N15 N14 M15 M14 M13 L16 M16 Type Description Preliminary DATA[31:0] I/O SDRAM data bus. ADDR[10:0] O SDRAM address bus. ADDR[10] is AP. BA1 BA0 RASB CASB WEB DQM CLK54MEM O O O O O O O SDRAM bank1 selection. SDRAM bank0 selection. SDRAM row address selection. SDRAM column address selection. SDRAM write enable. SDRAM write mask. SDRAM clock. Techwell, Inc. www.techwellinc.com 12 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller System Control Pins Name TEST RSTB IRQ HDAT[7:0] HWRB HRDB HALE HCSB1 HCSB0 HSPB CLK54I Number QFP 164 73 72 62,63, 65,66, 67,68, 69,71 61 60 59 57 56 55 74 LBGA D12 P7 R7 T5,R5, P5,N5, T6,R6, P6,N6 P4 R4 P3 R3 T3 T2 T8 I I O I/O I I I I I I I Only for the test purpose. Must be connected to VSSO. System reset. Active low. Interrupt request signal. Type Description Preliminary Data bus for parallel interface. HDAT[7] is serial data for serial interface. HDAT[6:1] is slave address[6:1] for serial interface. Write enable for parallel interface. VSSO for serial interface. Read enable for parallel interface. VSSO for serial interface. Address line enable for parallel interface. Serial clock for serial interface. Chip select 1 for parallel interface. VSSO for serial interface. Chip select 0 for parallel interface. Slave address[0] for serial interface. Select serial/parallel host interface. 54MHz system clock. Techwell, Inc. www.techwellinc.com 13 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Power / Ground Pins Name Number QFP VDDO LBGA P A1,A16, 18,47, K1,K16, 64,93, T1,T7, 110,139, 157,208 T10,T16 D1,D16, 6,24, G1,G16, 41,58, N1,N16, 99,116, T4,T13 133,151, 165,172, A8,A9, 173,175, A10,A11, 182 A12 168,169, D10,D11, 174,178, D13, E11, E12 179 185,187, A7,B7, 190 B8 D9,E7, 183,188, E8,E9, 192 E10 201 196 193 195 1,12, 29,35, 52,53, 70,75, 81,87, 104,105, 122,128, 145,156, 162,163, 202,203 A6 D6,E6 A5 D4,E5 F5~F12, G4~G13, H5~H12, J5~J12, K4~K13, L5~L12, M5~M12, N4,N7, N10,N13 Type Description Preliminary Digital power for output driver 3.3V. VDDI P Digital power for internal logic 1.8V. VDDVADC VSSVADC VDDVDAC VSSVDAC VDDAADC VSSAADC VDDADAC VSSADAC P G P G P G P G Analog power for Video ADC 1.8V. Analog ground for Video ADC 1.8V. Analog power for Video DAC 1.8V. Analog ground for Video DAC 1.8V. Analog power for Audio ADC 1.8V. Analog ground for Audio ADC 1.8V. Analog power for Audio DAC 1.8V. Analog ground for Audio DAC 1.8V. VSS G Ground. Techwell, Inc. www.techwellinc.com 14 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Pin Diagram 208 QFP Pin Diagram (Top -> Bottom View) Preliminary Techwell, Inc. www.techwellinc.com www.DataSheet.in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 VSS MPP1[3] MPP1[2] MPP1[1] MPP1[0] VDDI CLKMPP1 VDOX[7] VDOX[6] VDOX[5] VDOX[4] VSS VDOX[3] VDOX[2] VDOX[1] VDOX[0] CLKVDOX VDDO FLDENC VSENC HSENC ALINKO ADATM VDDI ADATR ASYNR ACLKR ADATP VSS ASYNP ACLKP CLKVDOY VDOY[7] VDOY[6] VSS VDOY[5] VDOY[4] VDOY[3] VDOY[2] VDOY[1] VDDI VDOY[0] PBDIN[7] PBDIN[6] PBDIN[5] PBDIN[4] VDDO PBDIN[3] PBDIN[2] PBDIN[1] PBDIN[0] VSS 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 VDDO MPP2[3] MPP2[2] MPP2[1] MPP2[0] VSS VSS TEST VDDVADC VIN0A VIN0B VSS VSS VIN1A VIN1B VDDVADC VDDVADC VSS VDDVADC VIN2A VIN2B VSS VSS VIN3A VIN3B VDDVADC VSS VAOYX VDDVDAC VAOCX VDDVDAC VSS VAOYY VDDVDAC NC VSS VDDADAC AOUT VSS VSS AIN0 AIN1 AIN2 AIN3 VDDAADC VSS VSS MPP1[7] MPP1[6] MPP1[5] MPP1[4] VDDO VSS MPP2[4] MPP2[5] MPP2[6] MPP2[7] VDDI CLKMPP2 DLINKI[7] DLINKI[6] DLINKI[5] DLINKI[4] VSS DLINKI[3] DLINKI[2] DLINKI[1] DLINKI[0] VLINKI VDDO HLINKI ALINKI DATA[0] DATA[1] DATA[2] VDDI DATA[3] DATA[4] DATA[5] DATA[6] VSS DATA[7] DATA[8] DATA[9] DATA[10] DATA[11] VSS DATA[12] DATA[13] DATA[14] DATA[15] DQM VDDI WEB CASB RASB CLK54MEM BA0 VDDO BA1 ADDR[0] ADDR[1] ADDR[2] VSS 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 VSS ADDR[3] ADDR[4] ADDR[5] ADDR[6] VDDI ADDR[7] ADDR[8] ADDR[9] ADDR[10]/AP DATA[16] VDDO DATA[17] DATA[18] DATA[19] DATA[20] DATA[21] VSS DATA[22] DATA[23] DATA[24] DATA[25] DATA[26] VSS DATA[27] DATA[28] DATA[29] DATA[30] DATA[31] VSS CLK54I RSTB IRQ HDAT[0] VSS HDAT[1] HDAT[2] HDAT[3] HDAT[4] HDAT[5] VDDO HDAT[6] HDAT[7] HWRB HRDB HALE VDDI HCSB1 HCSB0 HSPB PBCLK VSS TW2835 208QFP 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 15 Oct, 10, 2006 Datasheet Rev. 1.2 TW2835 Video and Audio Controller 256 LBGA Pin Diagram (Top->Bottom View) Preliminary A 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 VDDO MPP2 [5] MPP2 [4] MPP2 [2] VDD VADC VDD VADC VDD VADC VDD VADC VDD VADC VDD VDAC VDD AADC VDD ADAC MPP1 [7] MPP1 [4] MPP1 [1] VDDO B MPP2 [7] MPP2 [6] MPP2 [3] MPP2 [1] VIN0A C DLINKI [6] D VDDI E DLINKI [0] F DATA [0] G VDDI DATA [2] DATA [1] VSS H DATA [6] DATA [5] DATA [4] DATA [3] VSS J DATA [10] DATA [9] DATA [8] DATA [7] VSS K VDDO DATA [12] DATA [11] VSS L DQM DATA [15] DATA [14] DATA [13] VSS M CLK 54MEM RASB N VDDI P ADDR [1] ADDR [0] ADDR [5] ADDR [8] DATA [16] DATA [20] DATA [23] DATA [26] DATA [30] RSTB HDAT [1] HDAT [5] HWRB R ADDR [2] ADDR [3] ADDR [6] ADDR [9] DATA [17] DATA [21] DATA [24] DATA [27] DATA [31] IRQ HDAT [2] HDAT [6] HRDB T VDDO ADDR [4] ADDR [7] VDDI DATA [18] DATA [22] VDDO DATA [28] CLK54I 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 DLINKI DLINKI DLINKI ALINKI [7] [4] [1] CLK MPP2 MPP2 [0] VIN0B DLINKI DLINKI HLINKI [5] [2] VSS DLINKI VLINKI [3] VSS VSS BA1 CASB BA0 WEB VSS ADDR [10]/AP DATA [19] VSS DATA [25] DATA [29] VSS HDAT [0] HDAT [4] VSS TEST VSS VSS VSS VIN1A VIN1B VSS VSS VSS VSS VSS VSS VSS VSS VSS VIN2A VIN2B VSS VSS VSS VSS VSS VSS VSS VSS VSS VIN3A VIN3B VSS VSS VSS VSS VSS VSS VSS VSS VSS VDD VAOYX VAOCX VDAC VDD VAOYY VDAC AIN0 AIN1 NC VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VDDO HDAT [3] HDAT [7] VDDI VSS VSS VSS VSS VSS VSS VSS VSS VSS AIN2 MPP1 [6] MPP1 [3] MPP1 [0] CLK MPP1 AIN3 MPP1 [5] MPP1 [2] VDOX [6] VDOX [7] AOUT VSS VDOX [0] VDOX [1] VDOX [2] VDOX [3] VSS HS ENC VS ENC FLD ENC CLK VDOX VSS VSS VSS VDOY [7] CLK VDOY VSS VSS VDOY [1] VDOY [2] VDOY [3] VDOY [4] VSS PBDIN [5] VSS VDOX [4] VDOX [5] VDDI VSS ADATP VSS VDOY [5] VDOY [6] ADATM ACLKR PBDIN PBDIN [6] [3] HALE HCSB1 HCSB0 PB CLK ALINKO ASYNR ACLKP PBDIN PBDIN PBDIN [7] [4] [1] VDOY [0] VDDI HSPB VDDI ADATR ASYNP VDDO PBDIN PBDIN [2] [0] VDDO A B C D E F G H J K L M N P R T Techwell, Inc. www.techwellinc.com 16 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Functional Description Video Input Preliminary The TW2835 has 5 input interfaces that consist of 1 digital video input and 4 analog composite video inputs. Four analog video inputs are converted to digital video stream through 10 bits ADC and luminance/chrominance processor in built-in four video decoders. One digital input for playback application are decoded by internal ITU-R BT656 decoder and then fed to video control part and channel ID decoder. Each built-in video decoder has its own motion detector and dual scaler. Four additional scalers are also embedded for playback display application. The structure of video input is shown in the following Fig 1. PBIN PBCLK BT. 656 Decoder Channel ID Decoder H/V Crop & Scaler SCL_IN0_X 4X1 MUX Color Decoder SCL_IN1_X 4X1 MUX Color Decoder PB0_X PB1_X PB2_X PB3_X H/V Crop & Scaler H/V Crop & Scaler Motion Detector VIN0_X VIN0_Y VIN0A VIN0B Analog MUX & Anti-aliasing Filter H/V Crop & Scaler H/V Crop & Scaler Motion Detector VIN1_X VIN1_Y VIN1A VIN1B Analog MUX & Anti-aliasing Filter SCL_IN2_X 4X1 MUX Color Decoder To Video Control Part VIN2_X VIN2_Y VIN2A VIN2B H/V Crop & Scaler H/V Crop & Scaler Analog MUX & Anti-aliasing Filter SCL_IN3_X 4X1 MUX Color Decoder Motion Detector H/V Crop & Scaler H/V Crop & Scaler Motion Detector VIN3_X VIN3_Y VIN3A VIN3B Analog MUX & Anti-aliasing Filter 4 realtime record Output Fig 1 The structure of video input For the special 4ch real-time record application, the TW2835 supports 4 realtime video decoder outputs through the multi-purpose output pins (MPP1[7:0] and MPP2[7:0]). Techwell, Inc. www.techwellinc.com 17 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Analog Video Input The TW2835 supports all NTSC/PAL video standards for analog input and contains automatic standard detection circuit. Automatic standard detection can be overridden by writing the value into the IFMTMAN and IFORMAT (0x01, 0x11, 0x21, and 0x31) registers. Even if video loss is detected, the TW2835 can be forced to free-running in a particular video standard mode by IFORMAT register. The Table 1 shows the video input standards supported by TW2835. Table 1 Video input standards IFORMAT 0 1 2 3 4 5 6 Notes: * 7.5 IRE Setup PEDEST 0 1 1 0 0 0 1 1 0 Format PAL-BDGHI PAL-N* PAL-M* PAL-NC PAL-60 NTSC-J NTSC-M* NTSC-4.43* NTSC-N Line/Fv (Hz) 625/50 525/59.94 625/50 525/59.94 525/59.94 525/59.94 625/50 Fh (KHz) 15.625 15.734 15.625 15.734 15.734 15.734 15.625 Fsc (MHz) 4.43361875 3.57561149 3.58205625 4.43361875 3.579545 4.43361875 3.579545 Techwell, Inc. www.techwellinc.com 18 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Anti-aliasing Filter The TW2835 contains an anti-aliasing filter to prevent out-of-band frequency in analog video input signal. So there is no need of external components in analog input pin except ac coupling capacitor and termination resistor. The following Fig 2 shows the frequency response of the anti-aliasing filter. 5 Magnitude Response (dB) 0 -5 -10 -15 -20 -25 0 2 4 6 8 Frequency (Hz) 10 12 x 10 6 Fig 2. The frequency response of anti-aliasing filter Analog-to-Digital Converter The TW2835 contains four 10-bit ADC (Analog to Digital Converters) to digitize the analog video inputs. Each ADC has two analog switches that are controlled by the ANA_SW (0x0D, 0x1D, 0x2D, and 0x3D) register. The ADC can also be put into power-down mode by the ADC_PWDN (0x4C) register. Techwell, Inc. www.techwellinc.com 19 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Sync Processing The sync processor of the TW2835 detects horizontal and vertical synchronization signals in the composite video signal. The TW2835 utilizes proprietary technology for locking to weak, noisy, or unstable signals such as those from on air signal or fast forward/backward play of VCR system. A digital gain and clamp control circuit restores the ac coupled video signal to a fixed dc level. The clamping circuit provides line-by-line restoration of the video pedestal level to a fixed dc reference voltage. In no AGC mode, the gain control circuit adjusts only the video sync gain to achieve desired sync amplitude so that the active video is bypassed regardless of the gain control. But when AGC mode is enabled, both active video and sync are adjusted by the gain control. The horizontal synchronization processor contains a sync separator, a PLL and the related decision logic. The horizontal sync separator detects the horizontal sync by examining low-pass filtered video input whose level is lower than a threshold. Additional logic is also used to avoid false detection on glitches. The horizontal PLL locks onto the extracted horizontal sync in all conditions to provide jitter free image output. In case of missing horizontal sync, the PLL is on free running status that matches the standard raster frequency. The vertical sync separator detects the vertical synchronization pattern in the input video signals. The field status is determined at vertical synchronization time. When the location of the detected vertical sync is inline with a horizontal sync, it indicates a frame start or the odd field start. Otherwise, it indicates an even field. Techwell, Inc. www.techwellinc.com 20 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Color Decoding The digitized composite video data at 2X pixel clock rate first passes through decimation filter. The decimation filter is required to achieve optimum performance and prevent high frequency components from being aliased back into the video image. The following Fig 3 shows the frequency characteristic of the decimation filter. 0 -10 Magnitude Response (dB) -20 -30 -40 -50 -60 0 2 4 6 8 Frequency (Hertz) 10 12 x 10 6 Fig 3 The frequency characteristic of the decimation Filter The adaptive comb filter is used for high performance luminance/chrominance separation from NTSC/PAL composite video signals. The comb filter improves the luminance resolution and reduces noise such as cross-luminance and cross-color. The adaptive algorithm eliminates most of errors without introducing new artifacts or noise. To accommodate some viewing preferences, additional chrominance trap filters are also available in the luminance path. Techwell, Inc. www.techwellinc.com 21 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Fig 4 and Fig 5 show the frequency response of notch filter for each system NTSC and PAL. 0 -10 Magnitude Response (dB) -20 -30 -40 -50 -60 0 1 2 3 Frequency (Hertz) 4 5 x 10 6 6 Fig 4 The frequency response of luminance notch filter for NTSC 0 -10 Magnitude Response (dB) -20 -30 -40 -50 -60 0 1 2 3 Frequency (Hertz) 4 5 x 10 6 6 Fig 5 The frequency response of luminance notch filter for PAL Techwell, Inc. www.techwellinc.com 22 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Luminance Processing The luminance signal separated by adaptive comb or trap filter is then fed to a peaking circuit. The peaking filter enhances the high frequency components of the luminance signal via the Y_PEAK (0x0B, 0x1B, 0x2B, and 0x3B) register. The following Fig 6 shows the characteristics of the peaking filter for four different gain modes. 10 YPEAKMD = 1 9 8 Magnitude Response (dB) 7 6 5 4 3 2 1 0 0 1 2 3 4 Frequency (Hertz) 5 6 x 10 7 6 YPEAKMD = 0 Fig 6 The frequency characteristic of luminance peaking filter The picture contrast and brightness adjustment is provided through the CONT (0x09, 0x19, 0x29, and 0x39) and BRT (0x0A, 0x1A, 0x2A, and 0x3A) registers. The contrast adjustment range is from approximately 0 to 200 percent and the brightness adjustment is in the range of 25 IRE. Techwell, Inc. www.techwellinc.com 23 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Chrominance Processing The chrominance demodulation is done by first quadrature mixing for NTSC and PAL. The mixing frequency is equal to the sub-carrier frequency of NTSC and PAL. After the mixing, a LPF is used to remove 2X carrier signal and yield chrominance components. The characteristic of LPF can be selected for optimized transient color performance. The Fig 7 is showing the frequency response of chrominance LPF. 0 -5 -10 Magnitude Response (dB) -15 -20 -25 -30 -35 -40 -45 0 0.5 1 1.5 2 2.5 Frequency (Hertz) 3 3.5 x 10 4 6 Fig 7 The frequency response of chrominance LPF In case of a mistuned IF source, IF compensation filter makes up for any attenuation at higher frequencies or asymmetry around the color sub-carrier. The gain for the upper chrominance side band is controlled by the IFCOMP (0x46) register. The Fig 8 shows the frequency response of IF-compensation filter. Techwell, Inc. www.techwellinc.com 24 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller 10 Preliminary 5 Magnitude Response (dB) 0 -5 -10 -15 1.5 2 2.5 3 3.5 4 Frequency (Hertz) 4.5 5 5.5 x 10 6 Fig 8 The frequency characteristics of IF-compensation filter The ACC (Automatic Color gain Control) compensates for reduced chrominance amplitudes caused by high frequency suppression in video signal. The range of ACC is from -6dB to 30dB approximately. For black & white video or very weak & noisy signals, the internal color killer circuit will turn off the color. The color killing function can also be always enabled or disabled by programming CKIL (0x0C, 0x1C, 0x2C, and 0x3C) register. The color saturation can be adjusted by changing SAT (0x08, 0x18, 0x28, and 0x38) register. The Cb and Cr gain can be also adjusted independently by programming UGAIN (0x48) and VGAIN (0x49) registers. Likewise, the Cb and Cr offset can be programmed through the U_OFF (0x4A) and V_OFF (0x4B) registers. Hue control is achieved with phase shift of the digitally controlled oscillator. The phase shift can be programmed through the HUE (0x07, 0x17, 0x27, and 0x37) register. Realtime Record Mode The TW2835 supports four channel real-time record outputs with full D1 format through the DLINKI and MPP1/2 pins. Four channel real-time record outputs are independent of display and record path mode. The TW2835 also supports H/V/F signals for each channel through the DLINKI and MPP1/2 pins. The output modes of DLINKI and MPP1/2 pins are controlled via the MPP_MD (1xB0) and MPP_SET (1xB1, 1xB3, and 1xB5) registers. Techwell, Inc. www.techwellinc.com 25 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Digital Video Input The TW2835 supports digital video input with 8bit ITU-R BT.656 standard for playback. This digital input is decoded in built-in ITU-R BT 656 decoder and fed to the scaler block in order to display the scaled video data. The TW2835 supports error correction mode for decoding ITU-R BT.656. The decoded video data are also transferred to channel ID decoder part for auto cropping and strobe function. Digital Video Input Format The timing of digital video input is illustrated in Fig 9. PBCLK PBIN[7:0] FFh 00h 00h XY 80h 10h 80h 10h FFh 00h 00h XY Cb0 Y0 Cr0 Y1 Cb2 Y2 Cr2 Y3 Cb4 Y4 Cr4 Y5 Cb6 Y6 Cr6 Y7 Cb8 Y8 Cr8 Y9 EAV code Horizontal Blanking Period SAV code Horizontal Active Period Fig 9 Timing diagram of ITU-R BT.656 format for digital video input The SAV and EAV sequences are shown in Table 2. Table 2 ITU-R BT.656 SAV and EAV code sequence Condition 656 FVH Value SAV/EAV Code Sequence Field EVEN EVEN ODD ODD Vertical Blank Active Blank Active Horizontal EAV SAV EAV SAV EAV SAV EAV SAV F 1 1 0 0 V 1 0 1 0 H 1 0 1 0 1 0 1 0 0xFF 0x00 0x00 First Second Third Fourth 0xF1 0xEC 0xDA 0xC7 0xB6 0xAB 0x9D 0x80 Techwell, Inc. www.techwellinc.com 26 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Channel ID Decoder The TW2835 provides channel ID decoding function for playback input. The TW2835 supports three kinds of channel ID such as User channel ID, Detection channel ID, and auto channel ID. The User channel ID is used for customized information like system information and date. The Detection channel ID is used for detected information of current live input such as motion, video loss, blind and night detection information. The auto channel ID is employed for automatic identification of picture configuration which includes the channel number, analog switch, event, region enable and field/frame mode information. The TW2835 also supports both analog and digital type channel ID during VBI period. The digital channel ID has priority over analog channel ID. The analog type channel ID decoding is enabled via the VBI_ENA (1x86) register and the digital type channel ID decoding is operated via VBI_CODE_EN (1x86) register. Additionally to detect properly the analog channel ID against noise such as VCR source, the channel ID LPF can be enabled via the VBI_FLT_EN (1x86) register. The decoded channel ID information is used for auto cropping / strobe function and can also be read through the host interface. The detailed auto cropping / strobe function for playback input will be described at "Cropping Function" section (page 34) and "Playback Path Control" section (page 57). For channel ID detection mode, the TW2835 supports both automatic channel ID detection mode and manual channel ID detection mode. For an automatic channel ID detection mode, the playback input should include a run-in clock. But for a manual channel ID detection mode, the playback input can include a run-in clock or not via VBI_RIC_ON (1x88) register. In a manual detection mode, the TW2835 has several related register such as the VBI_PIXEL_HOS (1x87) to define horizontal start offset, the VBI_FLD_OS (1x88) to define line offset between odd and even field, the VBI_PIXEL_HW to define pulse width for 1 bit data, the VBI_LINE_SIZE (1x89) to define channel ID line size and the VBI_LINE_OS (1x89) to define line offset for channel ID. The VBI_MID_VAL (1x8A) register is used to define the threshold level between high and low. Even in automatic channel ID detection mode, the line size and bit width can be discriminated by reading the VBI_LINE_SIZE and VBI_PIXEL_HW (1xCB) register. The Fig 10 shows the relationship between channel ID and register setting. This channel ID information can be read through the CHID_TYPE or CHID_VALID (1x8B), AUTO_CHID 0/1/2/3 (1x8C~ 1x8F), DET_CHID 0/1/2/3/4/5/6/7 (1x98~1x9F), and USER_CHID 0/1/2/3/4/5/6/7 (1x90~1x97) registers. The CHID_TYPE register discriminates between the Auto channel ID (CHID_TYPE = "1") and User channel ID (CHID_TYPE = "0"). The CHID_VALID register indicates whether the detected channel ID type is valid or not. The AUTO_CHID, DET_CHID and USER_CHID registers are used to check the decoded channel ID data when the VBI_RD_CTL (1x88) register value is "1". Basically the channel ID is located in VBI period and auto strobe and cropping is executed after channel ID decoding. But for some case, the channel ID can be placed in vertical active period instead of VBI period. For this mode, the TW2835 also supports the channel ID decoding Techwell, Inc. www.techwellinc.com 27 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary function within vertical active period via the VAV_CHK (1x89) register and manual cropping function via the MAN_PBCROP (0xC0) register with proper VDELAY value. Video Output H V VBI_LINE_OS + VBI_FLD_OS F Digital Channel ID Analog Channel ID Format VBI_PIXEL_HOS Run-In Clock User Channel ID Detection Channel ID Auto Channel ID Parity VBI_MID_VAL A0 = 11000000 A1 = 11000001 A2 = 11000010 A2 = 11000010 Channel ID Type (*) VBI_PIXEL_WIDTH * Channel ID Type of each line can be detected with Channel ID Type. Auto channel ID = 001 / 010 (Repeated channel ID) Detection Channel ID = 011 / 100 User Channel ID = 101 / 110 Fig 10 The related register for manual channel ID detection Techwell, Inc. www.techwellinc.com 28 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Cropping and Scaling Function The TW2835 provides two methods to reduce the amount of video pixel data, scaling and cropping. The scaling function provides video image at lower resolution while the cropping function supplies only a portion of the video image. The TW2835 also supports an auto cropping function for playback input with channel ID decoding. The TW2835 has a free scaler for a variable image size in display path, but has a limitation of image size in record path such as Full / QUAD / CIF format. Cropping Function for Live The cropping function allows only subsection of a video image to be output. The active video region is determined by the HDELAY, HACTIVE, VDELAY and VACTIVE (0x02 ~ 0x06, 0x12 ~ 0x16, 0x22 ~ 0x26, 0x32 ~ 0x36) register. The first active line is defined by the VDELAY register and the first active pixel is defined by the HDELAY register. The VACTIVE register can be programmed to define the number of active lines in a video field, and the HACTIVE register can be programmed to define the number of active pixels in a video line. This function is used to implement for panning and tilt. The horizontal delay register HDELAY determines the number of pixel delays between the horizontal reference and the leading edge of the active region. The horizontal active register HACTIVE determines the number of active pixels to be processed. Note that these values are referenced to the pixel number before scaling. Therefore, even if the scaling ratio is changed, the active video region used for scaling remains unchanged as set by the HDEALY and HACTIVE register. In order for the cropping to work properly, the following equation should be satisfied. HDELAY + HACTIVE < Total number of pixels per line Where the total number of pixels per line is 858 for NTSC and 864 for PAL To process full size region, the HDELAY should be set to 32 and HACTIVE set to 720 for both NTSC and PAL system. The vertical delay register (VDELAY) determines the number of line delays from the vertical reference to the start of the active video lines. The vertical active register (VACTIVE) determines the number of lines to be processed. These values are referenced to the incoming scan lines before the vertical scaling. In order for the vertical cropping to work properly, the following equation should be satisfied. VDELAY + VACTIVE < Total number of lines per field Where the total number of lines per field is 262 for NTSC and 312 for PAL To process full size region, the VDELAY should be set to 6 and VACTIVE set to 240 for NTSC and the VDELAY should be also set to 5 and VACTIVE set to 288 for PAL. Oct, 10, 2006 Datasheet Rev. 1.2 Techwell, Inc. www.techwellinc.com 29 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Scaling Function for Live The TW2835 includes a high quality free horizontal and vertical down scaler for display path. But the TW2835 cannot use a free scaler function in record path because channel size definition for record path has a limitation such as Full / QUAD / CIF (Please refer to "Record Path Control" section, page 64). The video images can be downscaled in both horizontal and vertical direction to an arbitrary size. The luminance horizontal scaler includes an anti-aliasing filter to reduce image artifacts in the resized image via the HSFLT (0x80/90/A0/B0, 0x85/95/A5/B5 and 0x8A/9A/AA/BA) register and a 32 poly-phase filter to accurately interpolate the value of a pixel. This results in more aesthetically pleasing video as well as higher compression ratio in bandwidth-limited application. The following Fig 11 shows the frequency response of anti-aliasing filter for horizontal scaling. 5 0 -5 Magnitude Response (dB) -10 -15 -20 -25 -30 -35 -40 -45 0 1 2 3 4 Frequency (Hertz) 5 6 x 10 6 Fig 11 The frequency response of anti-aliasing filter for horizontal scaling Techwell, Inc. www.techwellinc.com 30 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Similarly, the vertical scaler also contains an anti-aliasing filter controlled via the VSFLT (0x80/90/A0/B0, 0x85/95/A5/B5 and 0x8A/9A/AA/BA) register and 16 poly-phase filters for down scaling. The filter characteristics are shown in the Fig 12. 0 -5 -10 Magnitude Response (dB) -15 -20 -25 -30 -35 -40 0 0.05 0.1 0.15 0.2 0.25 0.3 Frequency (Hertz) 0.35 0.4 0.45 0.5 Fig 12 The characteristics of anti-aliasing filter for vertical scaling Techwell, Inc. www.techwellinc.com 31 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Down scaling is achieved by programming the scaling register HSCALE and VSCALE (0x81 ~ 0x84, 0x91 ~ 0x94, 0xA1 ~ 0xA4, 0xB1 ~ 0xB4) register. When no scaled video image, the TW2835 will output the number of pixels as specified by the HACTIVE and VACTIVE (0x02 ~ 0x06, 0x12 ~ 0x16, 0x22 ~ 0x26, 0x32 ~ 0x36) register. If the number of output pixels required is smaller than the number specified by the HACTIVE/VACTIVE register, the 16bit HSCALE/ VSCALE register is used to reduce the output pixels to the desired number. The following equation is used to determine the horizontal scaling ratio to be written into the 16bit HSCALE register. HSCALE = [Npixel_desired/ HACTIVE] * (2^16 - 1) Where Npixel_desired is the desired number of active pixels per line For example, to scale picture from full size (HACTIVE = 720) to CIF (360 pixels), the HSCALE value can be found as: HSCALE = [360/720] * (2^16 - 1) = 0x7FFF The following equation is used to determine the vertical scaling ratio to be written into the 16bit VSCALE register. VSCALE = [Nline_desired / VACTIVE] * (2^16 - 1) Where Nline_desired is the desired number of active lines per field For example, to scale picture from full size (VACTIVE = 240 lines for NTSC and 288 lines for PAL) to CIF (120 lines for NTSC and 144 lines for PAL), the VSCALE value can be found as: VSCALE = [120 / 240] * (2^16 - 1) = 0x7FFF for NTSC VSCALE = [144 / 288] * (2^16 - 1) = 0x7FFF for PAL The scaling ratios of popular case are listed in Table 3. Table 3 HSCALE and VSCALE value for popular video formats Scaling Ratio 1 1/2 (CIF) 1/4 (QCIF) Format NTSC PAL NTSC PAL NTSC PAL Output Resolution 720x480 720x576 360x240 360x288 180x120 180x144 HSCALE 0xFFFF 0xFFFF 0x7FFF 0x7FFF 0x3FFF 0x3FFF VSCALE 0xFFFF 0xFFFF 0x7FFF 0x7FFF 0x3FFF 0x3FFF Techwell, Inc. www.techwellinc.com 32 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller The effect of scaling and cropping is shown in Fig 13. V reference Preliminary VACTIVE VDELAY HDELAY HACTIVE H reference VDELAY V reference VACTIVE HACTIVE * HSCALE Cropping and Scaling HDELAY HACTIVE H reference Fig 13 The effect of cropping and scaling VACTIVE * VSCALE Techwell, Inc. www.techwellinc.com 33 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Cropping and Scaling Function for Playback The TW2835 supports an auto cropping function with channel ID decoding for playback input. Each channel with the multiplexed playback input can be mapped into the desired position with the auto cropping function. If the PB_AUTO_EN (1x16) = "0", the TW2835 is set to a manual cropping mode so that user can control cropping with VDELAY_PB and HDELAY_PB (0x8B~0x8F, 0x9B~9F, 0xAB~AF and 0xBB~BF) register. If the PB_AUTO_EN = "1", the TW2835 is set into an auto cropping mode. In this mode, the desired channel can be chosen by PB_CH_NUM register (1x16, 1x1E, 1x26, 1x2E) and it will be cropped automatically to horizontal and vertical direction in playback input. The TW2835 has several related registers for this mode such as PB_CROP_MD, PB_ACT_MD and MAN_PBCROP (0xC0). The PB_CROP_MD defines the record mode of the playback input such as normal record mode or DVR record mode (Please refer to "Record Path Control" section, page 64). The PB_ACT_MD defines an active pixel size of horizontal direction such as 720 / 704 / 640 pixels. The MAN_PBCROP controls the horizontal and vertical starting offset in the auto cropping mode with HDELAY_PB and VDELAY_PB registers. It is useful in case that the encoded channel ID is located at vertical active area in ITU-R BT.656 data stream. Play back Input Display Output with New position PB3 PB2 PB0 PB1 PB1 PB0 PB2 PB3 CH0 : PB_CH_NUM0 = 0, (cropping H/V) CH1 : PB_CH_NUM1 = 1, (cropping V) CH2 : PB_CH_NUM2 = 2, (cropping H) CH3 : PB_CH_NUM3 = 3, (No cropping) Fig 14 The effect of auto cropping function The TW2835 includes four additional free down scaler for playback path so that the video image from playback input can be downscaled to an arbitrary size in both horizontal and vertical direction. Therefore, using this cropping and scaling function, the TW2835 supports free size and positioning function for both live and playback input in display path. The following Fig 15 shows the effect of scaling and cropping operation in playback. Techwell, Inc. www.techwellinc.com 34 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Play back Input Preliminary Display Scaling Output with New position PB3 PB2 PB3 Ch3 Ch0 PB1 PB1 PB0 PB0 : PB_CH_NUM0 = 0, (cropping H/V + Scaling) PB2 : PB_CH_NUM2 = 2, (cropping H) PB2 PB0 Ch1 Ch2 PB1 : PB_CH_NUM1 = 1, (cropping V + Scaling) PB3 : PB_CH_NUM3 = 3, (No cropping) Fig 15 The effect of scaling function in playback Techwell, Inc. www.techwellinc.com 35 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Motion Detection Preliminary The TW2835 supports motion detector individually for 4 analog video inputs. The built-in motion detection algorithm uses the difference of luminance level between current and reference field. The TW2835 also supports blind and night input detection for 4 analog video inputs. To detect motion properly according to situation, the TW2835 provides several sensitivity and velocity control parameters for each motion detector. The TW2835 supports manual strobe function to update motion detection so that it is more appropriate for user-defined motion sensitivity control. When motion, blind and night input are detected in any video inputs, the TW2835 provides the interrupt request to host via the IRQ pin. The host processor can take the information of motion, blind or night detection by accessing the IRQENA_MD (1x79), IRQENA_BD (1x7A) and the IRQENA_ND (1x7B) register. This status information is updated in the vertical blank period of each input. The TW2835 also provides the motion, blind and night detection result through the DLINKI and MPP0/1 pin with the control of MPP_MD (1xB0) and MPP_SET (1xB1, 1xB3 and 1xB5) register. The TW2835 supports an overlay function to display the motion detection result in the picture with 2D arrayed box. Techwell, Inc. www.techwellinc.com 36 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Mask and Detection Region Selection The motion detection algorithm utilizes the full screen video data and detects individual motion of 16x12 cells. This full screen for motion detection consists of 704 pixels and 240 lines for NTSC and 288 lines for PAL. Starting pixel in horizontal direction can be shifted from 0 to 15 pixels using the MD_ALIGN (2x82, 2xA2, 2xC2, and 2xE2) register. Each cell can be masked via the MD_MASK (2x86 ~ 2x9D, 2xA6 ~ 2xBD, 2xC6 ~ 2xDD, 2xE6 ~ 2xFD) register as illustrated in Fig 16. If the mask bit in specific cell is programmed to high, the related cell is ignored for motion detection. 704 Pixels (44 Pixels/Cell) 240 Lines for 60Hz (20 Lines/Cell), 288 Lines for 50Hz (24 Lines/Cell) MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK0 MASK0 MASK0 MASK0 MASK0 MASK0 MASK0 MASK0 MASK0 MASK0 MASK0 MASK0 MASK0 MASK0 MASK0 MASK0 [0] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [1] MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK1 MASK1 MASK1 MASK1 MASK1 MASK1 MASK1 MASK1 MASK1 MASK1 MASK1 MASK1 MASK1 MASK1 MASK1 MASK1 [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK2 MASK2 MASK2 MASK2 MASK2 MASK2 MASK2 MASK2 MASK2 MASK2 MASK2 MASK2 MASK2 MASK2 MASK2 MASK2 [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK3 MASK3 MASK3 MASK3 MASK3 MASK3 MASK3 MASK3 MASK3 MASK3 MASK3 MASK3 MASK3 MASK3 MASK3 MASK3 [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK4 MASK4 MASK4 MASK4 MASK4 MASK4 MASK4 MASK4 MASK4 MASK4 MASK4 MASK4 MASK4 MASK4 MASK4 MASK4 [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK5 MASK5 MASK5 MASK5 MASK5 MASK5 MASK5 MASK5 MASK5 MASK5 MASK5 MASK5 MASK5 MASK5 MASK5 MASK5 [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK6 MASK6 MASK6 MASK6 MASK6 MASK6 MASK6 MASK6 MASK6 MASK6 MASK6 MASK6 MASK6 MASK6 MASK6 MASK6 [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK7 MASK7 MASK7 MASK7 MASK7 MASK7 MASK7 MASK7 MASK7 MASK7 MASK7 MASK7 MASK7 MASK7 MASK7 MASK7 [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK8 MASK8 MASK8 MASK8 MASK8 MASK8 MASK8 MASK8 MASK8 MASK8 MASK8 MASK8 MASK8 MASK8 MASK8 MASK8 [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK9 MASK9 MASK9 MASK9 MASK9 MASK9 MASK9 MASK9 MASK9 MASK9 MASK9 MASK9 MASK9 MASK9 MASK9 MASK9 [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK10 MASK10 MASK10 MASK10 MASK10 MASK10 MASK10 MASK10 MASK10 MASK10 MASK10 MASK10 MASK10 MASK10 MASK10 MASK10 [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MD_ MASK11 MASK11 MASK11 MASK11 MASK11 MASK11 MASK11 MASK11 MASK11 MASK11 MASK11 MASK11 MASK11 MASK11 MASK11 MASK11 [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] Fig 16 Motion mask and detection cell The MD_MASK register has different function for reading and writing mode. For writing mode, setting "1" to MD_MASK register inhibits the specific cell from detecting motion. For reading mode, the MD_MASK register has three kinds of information depending on the MASK_MODE (2x82, 2xA2, 2xC2, and 2xE2) register. For MASK_MODE = "0", the state of MD_MASK register means the result of VIN_A motion detection that "1" indicates detecting motion and "0" denotes no motion detection in the cell. For MASK_MODE = "1", the state of MD_MASK register means the result of VIN_B motion detection. For MASK_MODE = "2 or 3", the state of MD_MASK register means masking information of cell. Techwell, Inc. www.techwellinc.com 37 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Sensitivity Control The motion detector has 4 sensitivity parameters to control threshold of motion detection such as the level sensitivity via the MD_LVSENS (2x83, 2xA3, 2xC3, and 2xE3) register, the spatial sensitivity via the MD_SPSENS (2x85, 2xA5, 2xC5, 2xE5) and MD_CELSENS (2x83, 2xA3, 2xC3, and 2xE3) register, and the temporal sensitivity parameter via the MD_TMPSENS (2x85, 2xA5, 2xC5, and 2xE5) register. Level Sensitivity In built-in motion detection algorithm, the motion is detected when luminance level difference between current and reference field is greater than MD_LVSENS value. Motion detector is more sensitive for the smaller MD_LVSENS value and less sensitive for the larger. When the MD_LVSENS is too small, the motion detector may be weak in noise. Spatial Sensitivity The TW2835 uses 192 (16x12) detection cells in full screen for motion detection. Each detection cell is composed of 44 pixels and 20 lines for NTSC and 24 lines for PAL. Motion detection from only luminance level difference between two fields is very weak in spatial random noise. To remove the fake motion detection from the random noise, the TW2835 supports a spatial filter via the MD_SPSENS register which defines the number of detected cell to decide motion detection in full size image. The large MD_SPSENS value increases the immunity of spatial random noise. Each detection cell has 4 sub-cells also. Actually motion detection of each cell comes from comparison of sub-cells in it. The MD_CELSENS defines the number of detected sub-cell to decide motion detection in cell. That is, the large MD_CELSENS value increases the immunity of spatial random noise in detection cell. Temporal Sensitivity Similarly, temporal filter is used to remove the fake motion detection from the temporal random noise. The MD_TMPSENS regulates the number of taps in the temporal filter to control the temporal sensitivity so that the large MD_TMPSENS value increases the immunity of temporal random noise. Techwell, Inc. www.techwellinc.com 38 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Velocity Control The motion has various velocities. That is, in a fast motion an object appears and disappears rapidly between the adjacent fields while in a slow motion it is to the contrary. As the built-in motion detection algorithm uses the only luminance level difference between two adjacent fields, a slow motion is inferior in detection rate to a fast motion. To compensate this weakness, MD_SPEED (2x84, 2xA4, 2xC4, and 2xE4) parameter is used which is controllable up to 64 fields. MD_SPEED parameter adjusts the field interval in which the luminance level is compared. Thus, for detection of a fast motion a small value is needed and for a slow motion a large value is required. The parameter MD_SPEED value should be greater than MD_TMPSENS value. Additionally, the TW2835 has 2 more parameters to control the selection of reference field. The MD_FLD (2x82, 2xA2, 2xC2, and 2xE2) register is a field selection parameter such as odd, even, any field or frame. The MD_REFFLD (2x80, 2xA0, 2xC0, and 2xE0) register is provided to control the updating period of reference field. For MD_REFFLD = "0", the interval from current field to reference field is always same as the MD_SPEED. It means that the reference filed is always updated every field. The Fig 17 shows the relationship between current and reference field for motion detection when the MD_REFFLD is "0". Time Field0 Field1 Field2 Field3 Field4 Field5 Field6 Field7 Field8 Field9 Field10 Field11 Field12 M1 M7 M2 M8 M3 M9 M4 M10 M5 M11 M6 M12 Reference Field Current Field Detection between Reference and Current Field Fig 17 The relationship between current and reference field when MD_REFFLD = "0" Techwell, Inc. www.techwellinc.com 39 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary The TW2835 can update the reference field only at the period of MD_SPEED when the MD_REFFLD is high. For this case, the TW2835 can detect a motion with sense of a various velocity. The Fig 18 shows the relationship between current and reference field for motion detection when the MD_REFFLD = "1". Time Field0 Field1 Field2 Field3 Field4 Field5 Field6 Field7 Field8 Field9 Field10 Field11 Field12 M1 M7 M2 M8 M3 M9 M4 M10 M5 M11 M6 M12 Reference Field Current Field Detection between Reference and Current Field Fig 18 The relationship between current and reference field when MD_REFFLD = "1" The TW2835 also supports the manual detection timing control of the reference field/frame via the MD_STRB_EN and MD_STRB (2x84, 2xA4, 2xC4, and 2xE4) register. For MD_STRB_EN = "0", the reference field/frame is automatically updated and reserved on every reference field/frame. For MD_STRB_EN = "1", the reference field/frame is updated and reserved only when MD_STRB = "1". In this mode, the interval between current and reference field/frame depends on user's strobe timing. This mode is very useful for a specific purpose like nonperiodical velocity control and very slow motion detection. The TW2835 also provides dual detection mode for non-realtime application such as pseudo8ch application via MD_DUAL_EN (2x83, 2xA3, 2xC3, and 2xE3) register. For MD_DUAL_EN = 1, the TW2835 can detect dual motion independently for VIN_A and B Input which is defined by the ANA_SW (0x0D, 0x1D, 0x2D, and 0x3D) register. In this case, the MD_SPEED is limited to 31. These motion information can be read via the IRQENA_MD (1x79) register by the host interface. Techwell, Inc. www.techwellinc.com 40 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Blind Detection The TW2835 supports blind detection individually for 4 analog video inputs and makes an interrupt of blind detection to host. If video level in wide area of field is almost equal to average video level of field due to camera shaded by something, this input is defined as blind input. The TW2835 has two sensitivity parameters to detect blind input such as the level sensitivity via the BD_LVSENS (2x80, 2xA0, 2xC0, and 2xE0) register and spatial sensitivity via the BD_CELSENS (2x80, 2xA0, 2xC0, and 2xE0) register. The TW2835 uses total 768 (32x24) cells in full screen for blind detection. The BD_LVSENS parameter controls the threshold of level between cell and field average. The BD_CELSENS parameter defines the number of cells to detect blind. For BD_CELSENS = "0", the number of cell whose level is same as average of field should be over than 60% to detect blind, 70% for BD_CELSENS = "1", 80% for BD_CELSENS = "2", and 90% for BD_CELSENS = "3". That is, the large value of BD_LVSENS and BD_CELSENS makes blind detector less sensitive. The TW2835 also supports dual detection mode for non-realtime application such as pseudo8ch application via the MD_DUAL_EN (2x83, 2xA3, 2xC3, and 2xE3) register. The host can read blind detection information for both VIN_A and VIN_B input via the IRQENA_BD (1x7A) register. Night Detection The TW2835 supports night detection individually for 4 analog video inputs and makes an interrupt of night detection to host. If an average of field video level is very low, this input is defined as night input. Likewise, the opposite is defined as day input. The TW2835 has two sensitivity parameters to detect night input such as the level sensitivity via the ND_LVSENS (2x81, 2xA1, 2xC1, and 2xE1) register and the temporal sensitivity via the ND_TMPSENS (2x81, 2xA1, 2xC1, and 2xE1) register. The ND_LVSENS parameter controls threshold level of day and night. The ND_TMPSENS parameter regulates the number of taps in the temporal low pass filter to control the temporal sensitivity. The large value of ND_LVSENS and ND_TMPSENS makes night detector less sensitive. The TW2835 also supports dual detection mode for non-realtime application such as pseudo8ch application via the MD_DUAL_EN (2x83, 2xA3, 2xC3, and 2xE3) register. The host can read night detection information for both VIN_A and VIN_B input via the IRQENA_ND (1x7B) register. Techwell, Inc. www.techwellinc.com 41 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Video Control Preliminary The TW2835 has dual video controllers for display and record path. The TW2835 requires only external 64M SDRAM @ 32bit interface for proper operation. The TW2835 supports 8 channel display mode for display path and 4 channel for record path. The block diagram of video controller is shown in the following Fig 19. 64M SDRAM @ 32 Bit Data-bus Memory Interface PB0_X PB1_X PB2_X PB3_X VIN0_X VIN1_X VIN2_X VIN3_X 8X8 INPUT MUX Write Control Read Control Zoom & Image Enhance VOUT_X From Video Input Part To OSD Overlay Control Part Noise Reduction & Channel ID Encoding VIN0_Y VIN1_Y VIN2_Y VIN3_Y 4X4 INPUT MUX VOUT_Y Fig 19 Block diagram of video controller The TW2835 supports channel blanking, boundary on/off, blink, horizontal/vertical mirroring, and freeze function for each channel. The TW2835 can capture last 4 images automatically for each channel when video loss is detected. The TW2835 has three operating modes such as live, strobe and switch mode. Each channel can be operated in its individual operating mode. That is, the TW2835 can be operated in multioperating mode if each channel has different operating mode. Live mode is used to display real time video as QUAD or full live display, strobe mode is used to display non-realtime video with strobe signal from host and switch mode is used to display time-multiplexed video from several channels. For switch mode, the TW2835 supports two different types such as switch live and switch still mode. The TW2835 also provides four record picture modes such as normal record mode and frame record mode and DVR normal record mode and DVR frame record mode. For record path, channel size and position have a limitation to half or full size in the horizontal and vertical direction. Techwell, Inc. www.techwellinc.com 42 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary For display path, the TW2835 can save and recall video through external extended SDRAM and support image enhancement function for non-realtime video such as freezing or playback video and provide high performance 2X zoom function. For record path, the TW2835 supports a noise reduction filter to reduce the compression data size and channel ID encoding that contains all current picture configurations. The TW2835 also provides chip-to-chip cascade connection for 8 or 16 channel application. Channel Input Selection The channel for display path can select 1 input from 8 video inputs including 4 live video inputs and 4 playback inputs, but the channel for record path can choose 1 input from 4 live video inputs. The live video inputs can be selected via the DEC_PATH (0x80, 0x90, 0xA0, 0xB0 for display path, 1x60, 1x63, 1x66, 1x69 for record path) register and the playback inputs can be chosen via the PB_PATH_EN (1x10/13, 1x18/1B, 1x20/23, 1x28/2B) register. The Fig 20 shows the internal channel input selection. DEC_PATH0_X (0x80) VIN0 VIN1 VIN2 VIN3 VIN0_X 4X1 MUX VIN0_X 2X1 MUX CH0_X PB_PATH_EN (1x10) VIN0_Y VIN1_Y VIN2_Y VIN3_Y DEC_PATH0_Y (1x60) 4X1 MUX CH0_Y DEC_PATH1_X (0x90) 4X1 MUX PB_PATH_EN (1x13) 2X1 MUX DEC_PATH1_Y (1x63) 4X1 MUX VIN1_X PB0_X CH4_X CH1_Y To Write Control Part (Record Path) DEC_PATH2_X (0xA0) VIN1_X 4X1 MUX VIN2_X PB_PATH_EN (1x18) 2X1 MUX DEC_PATH2_Y (1x66) 4X1 MUX CH1_X CH2_Y DEC_PATH3_X (0xB0) 4X1 MUX PB_PATH_EN (1x1B) 2X1 MUX DEC_PATH3_Y (1x69) 4X1 MUX To Write Control Part (Display Path) VIN3_X PB1_X CH5_X CH3_Y PB_PATH_EN (1x20) VIN2_X PBIN PB CHID DEC PB0_X 2X1 MUX CH2_X PB_PATH_EN (1x23) PB CHID DEC 2X1 MUX PB1_X PB2_X CH6_X PB_PATH_EN (1x28) VIN3_X PB CHID DEC PB2_X 2X1 MUX CH3_X PB_PATH_EN (1x2B) PB CHID DEC 2X1 MUX PB3_X PB3_X CH7_X Fig 20 Channel input selection Techwell, Inc. www.techwellinc.com 43 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Channel Operation Mode Each channel can be working with three kinds of operating mode such as live, strobe and switch mode via the FUNC_MODE (1x10, 1x13, 1x18, 1x1B, 1x20, 1x23, 1x28, and 1x2B for display path, 1x60, 1x63, 1x66, and 1x69 for record path) register. The operation mode can be selected individually for each channel so that multi-operating mode can be implemented. Live Mode If FUNC_MODE is "0", channel is operated in live mode. For the live mode, the video display is updated with real time. This mode is used to display a live video such as QUAD, PIP, and POP. When changing the picture configuration such as input path, popup priority, PIP, POP, and etc, the TW2835 supports anti-rolling sequence by monitoring channel update with the STRB_REQ register (1x01 for display path, 1x54 for record path) after changing to strobe operation mode (FUNC_MODE = "1"). The following Fig 21 shows the sequence to change picture configuration. Picture Configuration Change Start Change FUNC_MODE = 1 NO STRB_REQ = "0" ? YES Change Change Change Change Channel Channel Channel Channel Scaling Size Position Popup Change FUNC_MODE = 0 Picture Configuration Change End Fig 21 The sequence to change picture configuration The status of STRB_REQ register can also be read through MPP1/2 pin with control of the MPPMD and MPPSET (1xB0, 1xB1, 1xB3, and 1xB5) register. Techwell, Inc. www.techwellinc.com 44 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Strobe Mode If FUNC_MODE is "1", channel is operated in strobe mode. For strobe mode, video display is updated whenever the TW2835 receives strobe command from host like CPU or Micom. If host doesn't send a strobe command to the TW2835 anymore, the channel maintains the last strobe image until getting a new strobe command. This mode is useful to display non-realtime video input such as playback video with multiplexed signal input and to implement pseudo 8 channel application or dual page mode or panorama channel display. Specially, the TW2835 supports easy interface for pseudo 8channel application that will be covered in display path control section. The TW2835 also supports auto strobe function for auto playback display that will be covered later in auto strobe function section. Strobe operation is performed independently for each channel via the STRB_REQ (1x04, 1x54) register. But the STRB_REQ register has a different mode for reading and writing. Writing "1" into STRB_REQ in each channel makes the TW2835 updated by each incoming video. The updating status after strobe command can be known by reading the STRB_REQ register. If reading value is "1", updating is not completed after getting the strobe command. In that case, this channel cannot accept a new strobe command or a disabling strobe command from host. To send a new strobe command, host should wait until STRB_REQ state is "0". For freeze or non-strobe channel, the TW2835 can ignore the strobe command even though host sends it. In this case, the STRB_REQ register is cleared to "0" automatically without any updating video. The status of STRB_REQ register can also be read through MPP1/2 pin with control of the MPPSET (1xB3) register. When updating video with a strobe command, the TW2835 supports field or frame updating mode via the STRB_FLD (1x04, 1x54) register. Odd field of input video can be updated and displayed for STRB_FLD = "0", even field for "1". For "2" of STRB_FLD register, the TW2835 doesn't care for even or odd field, and updates video by next any field. If the STRB_FLD register is "3", the strobe command updates video by frame. The following Fig 22 shows the example of strobe sequence for various STRB_FLD value. Techwell, Inc. www.techwellinc.com 45 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Vertical Vertical Blank Active Analog Input STRB_FLD 00 (Odd) User strobe Odd Even Odd Even Odd Even Odd Even Preliminary Odd Even S1 S2 S3 S4 STRB_REQ S1 Update S2 Update S3 Update S4 Ignored due to S3 is not finished 01 (Even) STRB_REQ S1 Update S2 Update S4 Update S3 Ignored due to S2 is not finished 10 (Any Field) STRB_REQ S1 Update S2 Update S3 Update S4 Update 11 (Frame) STRB_REQ S1 Update S2 Ignored due to S1 is not finished S3 Update S4 Ignored due to S3 is not finished Fig 22 The example of strobe sequence for various STRB_FLD setting The timing of strobe operation is related only with input video timing and strobe operation can be performed independently for each channel. So each channel is updated with different timing. The TW2835 provides a special feature as dual page mode using the DUAL_PAGE (1x01, 1x54) register. Although each channel is updated with different time, all channels can be displayed simultaneously in dual page mode. This means that the TW2835 waits until all channels are updated and then displays all channels with updated video at the same time. When dual page mode is enabled, host should send a strobe command for all channels and host should wait until all channels complete their strobe operations to send a new strobe command. The Fig 23 shows the example of 4 channel strobe sequences for dual page. S2 is ignored because strobe sequence for CH 0 and CH 1 is not completed User strobe S1 S2 S3 S4 S5 CH 0 STRB_REQ[0] CH 1 STRB_REQ[1] CH 2 STRB_REQ[2] CH 3 STRB_REQ[3] Odd Odd Even Odd Even Odd Even Odd Even Odd Even Even Odd Even Odd Even Odd Even Odd Even Odd Even Odd Even Odd Even Odd Even Odd Even Odd Even Even Odd Even Odd Even Odd Even Odd Even Odd Even Fig 23 The example of 4 channel strobe sequences for dual page mode Techwell, Inc. www.techwellinc.com 46 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Switch Mode If FUNC_MODE is "2", channel is operated in switch mode. The TW2835 supports 2 different switching types such as still switching and live switching mode via the MUX_MODE (1x06, 1x56) register. For still switching mode, the TW2835 maintains the switched channel video as still image until next switching request, but for live switching mode the TW2835 updates every field of switched channel until next switching request. The live switching mode is used for channel sequencer without any timing loss or disturbing. In switch mode, there is a constraint that the picture size of all switched channel should be same even though their size can be varied. The TW2835 can switch the channel by fields or frames that can be programmed up to 1 field or 1 frame rate. But if the channel is on freeze state, skip mode or disabled, the TW2835 ignores the request for switch mode. Switch Trigger Mode To operate the switching function properly, the channel switching should be requested with triggering that has three kinds of mode such as internal triggering from internal field counter, external triggering from external host or pin and interrupted triggering like alarm. The triggering mode can be selected by the TRIG_MODE (1x56) register. The TW2835 supports all triggering mode in record path, but provides only interrupt triggering mode in display path. The TW2835 contains 128 depth internal queues that have channel sequence information with internal or external triggering. Actual queue size can be defined by the QUE_SIZE (1x57) register. The channel switching sequence in the internal queue is changed by setting "1" to QUE_WR (1x5A) register after defining the queue address with the QUE_ADDR (1x5A) register and the channel switching information with the MUX_WR_CH (1x59) register. The QUE_WR register will be cleared automatically after updating queue. The channel sequence information can be read via the CHID_MUX_OUT (1x0A for display path, 1x5E for record path) register. The following Fig 24 shows the structure of switching operation. Record Path Only QUE_WR QUE_POS_RST QUE_ADDR QUE_SIZE = 7 Q4 Q5 Q6 Q7 Q0 Q3 Q2 Q1 QUE_POS QUE_CH TRIG_MODE Internal Queue Queue Read/Write Control Internal Field Counter External Triggering Detector QUE_PERIOD QUE_CNT_RST EXT_TRIG PIN_TRIG INTR_REQ INTR_CH Switching Interrupt Detector Switching Arbitration Switching Operation Control MUX_OUT_CH Fig 24 The structure of switching operation when QUE_SIZE = 7 Techwell, Inc. www.techwellinc.com 47 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary For internal triggering mode, the switching period can be specified in the QUE_PERIOD (1x58) register that has 1 ~ 1024 field range. The internal field counter can be reset at anytime using the QUE_CNT_RST (1x5B) register and restarted automatically after reset. To reset an internal queue position, set "1" to QUE_POS_RST (1x5B) register and then the queue position will be restarted after reset. Both QUE_CNT_RST and QUE_POS_RST register can be cleared automatically after set to "1". The following Fig 25 shows an illustration of QUE_POS_RST and QUE_CNT_RST. The next queue position can be read via the QUE_ADDR (1x5A) register. Period restart Triggering Encoder Output QUE_POS_RST QUE_CNT_RST Field Counter QUE_POS (Channel) T1 QUE_PERIOD = 4 Position restart T5 T0 Period/Position restart T1 T0 T1 T2 T3 T4 1234012340101234012340123401201234012340 Q2 (2) Q3 (3) Q4 (0) Q5 (1) Q6 (2) Q0 (0) Q1 (1) Q2 (2) 0 Q1 (1) Q2 (2) MUX_OUT_CH 0 1 2 3 0 1 0 1 0 Fig 25 The illustration of QUE_POS_RST and QUE_CNT_RST For external triggering mode, the request of channel switching comes from the EXT_TRIG (1x59) register or TRIGGER pin that is controlled by the PIN_TRIG_MD (1x56) register. Like internal triggering mode, writing "1" to the QUE_POS_RST register can reset the queue position in external triggering mode. For interrupt triggering, host can request the channel switching at anytime via the INTR_REQ (1x07, 1x59) register. The switching channel is defined by the INTR_CH (1x07 for display path) or MUX_WR_CH (1x59 for record path) registers. Because the interrupted trigger has a priority over internal or external triggering in record path, the channel defined by the MUX_WR_CH can be inserted into the programmed channel sequence immediately. Switching Sequence The TW2835 also provides various switching types as odd field, even field or frame switching via the MUX_FLD (1x06, 1x56) register. For MUX_FLD = "0", it is working as field switching mode with only odd field, but with only even field for MUX_FLD = "1". For MUX_FLD = "2" or "3", it is working as frame switching with both odd and even field. Actually the channel switching is executed just before vertical sync of video output in field switching mode or before vertical sync of only odd field in frame switching mode. So all register Techwell, Inc. www.techwellinc.com Oct, 10, 2006 Datasheet Rev. 1.2 48 www.DataSheet.in TW2835 Video and Audio Controller Preliminary for switching should be set before that time. Otherwise, the control values will be applied to the next field or frame. Likewise, the switching channel information is updated just before vertical sync of video output in field switching or before vertical sync of only odd field in frame switching mode. Basically the switching sequence takes 4 field duration to display the switching channel from any triggering (field or frame). The host can read the current switching channel information through the MUX_OUT_CH (1x08, 1x6E) register. The TW2835 also supports external pin output for this channel information with DLINKI and MPP1/2 pin via the MPP_MD and MPP_SET (1xB0, 1xB1, 1xB3, and 1xB5) register. The switching channel information can also be discriminated by the channel ID in the video stream. The following Fig 26 shows the illustration of channel switching with internal triggering. Triggering T0 T1 T2 T3 T0 T1 T2 Encoder Output Vertical Vertical Blank Active LINK Pin INTR_REQ QUE_POS 1 2 3 0 1 2 3 MUX_OUT_CH Video output 2 3 0 1 2 3 0 Mux output delay = 4 Fields Fig 26 The illustration of switching sequence when QUE_SIZE = 3, QUE_PERIOD = 1 Techwell, Inc. www.techwellinc.com 49 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary The following Fig 27 shows the illustration of channel switching with the combination of internal triggering and interrupted triggering mode. Switch interrupt Triggering is delayed due to switch interrupt switch interrupt is inserted between programmed triggering Triggering Encoder output INTR_REQ QUE_POS Vertical Vertical Blank Active T0 I3 T1 T2 I1 T3 T0 T1 T2 1 2 3 0 1 2 3 MUX_OUT_CH 2 3 0 3 Interrupt Output 1 2 1 Interrupt Output 3 0 Mux output delay = 4 Fields Fig 27 The interrupted switching sequence when QUE_SIZE = 3, QUE_PERIOD = 1 The TW2835 supports the skip function of the switching queue for switch mode in record path. In single chip application, the auto skip function of the switching queue can be supported if the MUX_SKIP_EN (1x5B) register is "1" and the NOVID_MODE is "1" or "3". But in the chip-to-chip cascaded application, the skip function should be forced with the MUX_SKIP_CH (1x5C, 1x5D) register because the switching queue for whole channels is located in the lowest slaver device but cannot get the no-video information from the other chips. The QUAD MUX function in chipto-chip cascade application will be covered in the "Chip-to-Chip Cascade Operation (page 76)". Techwell, Inc. www.techwellinc.com 50 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Channel Attribute The TW2835 provides various channel attributes such as channel enabling, popup enabling, boundary selection, blank enabling, freeze, horizontal/vertical mirroring for both display and record path. As special feature, the TW2835 supports the last image capture function, save and recall function, image enhancement and playback input selection for display path. For last image capture mode, channel can be blanked or boundary can be blinked automatically on video loss state. Background Control Summation of all active channel regions can be called as active region and the rest region except active region is defined as background region. The TW2835 supports background overlay and the overlay color is controlled via the BGDCOL (1x0F, 1x5F) register. Boundary Control The TW2835 can overlay channel boundary on each channel region using the BOUND (1x11, 1x14, 1x19, 1x1C, 1x21, 1x24, 1x29, and 1x2C for display path, 1x61, 1x64, 1x67, and 1x6A for record path) register and it can be blinked via the BLINK (1x11, 1x14, 1x19, 1x1C, 1x21, 1x24, 1x29, and 1x2C for display path, 1x61, 1x64, 1x67, and 1x6A for record path) register when BOUND is high. The boundary color of channel can be selected through the BNDCOL (1x0F, 1x5F) register. The blink period can be also controlled through the TBLINK (1x01, 1x52) register. Blank Control Each channel can be blanked with specified color using the BLANK (1x11, 1x14, 1x19, 1x1C, 1x21, 1x24, 1x29, and 1x2C for display path, 1x61, 1x64, 1x67, and 1x6A for record path) register and the blank color can be specified via the BLKCOL (1x0F, 1x3F) register. Freeze Control Each channel can capture last 4 field images whenever freeze function is enabled and display 1 field image out of the captured 4 field images using the FRZ_FLD (1x0F, 1x3F) register. The freeze function can be enabled or disabled independently for each channel via the FREEZE (1x11, 1x14, 1x19, 1x1C, 1x21, 1x24, 1x29, and 1x2C for display path, 1x61, 1x64, 1x67, and 1x6A for record path) register. The TW2835 also supports frame freeze function via the FRZ_FRAME (1x01, 1x52) register, and 1 frame image out of the captured 2 frame images using the FRZ_FLD (1x0F, 1x3F) register. Techwell, Inc. www.techwellinc.com 51 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Last Image Captured When video loss has occurred or gone, the TW2835 provides 4 kinds of indication such as bypass of incoming video, channel blank, capture of last image, and capture of last image with blinking channel boundary depending on the NOVID_MODE (1x05, 1x55) register. This function is working automatically on video loss. The capturing last image is same as freeze function described above. User can select 1 field image out of captured 4 filed images via the FRZ_FLD (1x0F, 1x5F) register which is shared with freeze function. The TW2835 has frame freeze function via the FRZ_FRAME (1x01, 1x52) register, and 1 frame image out of the captured 2 frame images using the FRZ_FLD (1x0F, 1x3F) register. Horizontal / Vertical Mirroring The TW2835 supports image-mirroring function for horizontal and/or vertical direction. The horizontal mirroring is achieved via the H_MIRROR (1x11, 1x14, 1x19, 1x1C, 1x21, 1x24, 1x29, and 1x2C for display path, 1x61, 1x64, 1x67, and 1x6A for record path) register and the vertical mirroring is attained via the V_MIRROR (1x11, 1x14, 1x19, 1x1C, 1x21, 1x24, 1x29, and 1x2C for display path, 1x61, 1x64, 1x67, and 1x6A for record path) register. It is useful for a reflection image in the horizontal and vertical direction from dome camera or car-rear vision system. Field to Frame Conversion If the displayed channel size is half size of the video input in vertical direction, the video input can be separated into two (odd/even) fields according to the line numbers such as odd line for odd field and even line for even field. With this conversion, the vertical resolution of the video input can be enhanced compared with simple half vertical scaling, but the field rate is reduced to half. This mode can be enabled via the FIELD_OP (1x12, 1x15, 1x1A, 1x1D, 1x22, 1x25, 1x2A, and 1x2D for display path, 1x62, 1x65, 1x68 and 1x6B for record path) register. Techwell, Inc. www.techwellinc.com 52 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Display Path Control The TW2835 can save images in external memory and recall them to display. This function can be working in display path. The TW2835 also supports the special filter to enhance image quality in display path for non-realtime video display such as frozen image, recalled image from saved images or playback input with multiplexed video source. The TW2835 provides high performance 2X zoom function in the vertical and horizontal direction. The TW2835 supports any kind of picture configuration for display path with arbitrary picture size, position and pop-up control. The TW2835 also provides 8 channel display function for full triplex application (Display + Record + Playback) and the pseudo 8ch display function for nonrealtime application. Save and Recall Function The save/recall function can be working independently for each channel and the number of the saved images depends on the picture size and field type. The TW2835 can save image only in live channel so that it cannot be saved in frozen channel. If channel is working on strobe operating mode, this channel can be saved with new strobe command. For switch operating mode, the channel can be saved only on switching time because this channel can be updated at this moment. But, the save function cannot be working simultaneously with 1 ~ 5 frame bitmap page mode because both regions are overlapped with each other. To save image, several parameters should be controlled that are the SAVE_FLD, SAVE_HID, SAVE_ADDR (1x02) and SAVE_REQ (1x03) registers. The SAVE_FLD determines field or frame type for image to be saved. Even though the channel to be saved is hidden by upper layer picture, it can be saved using the SAVE_HID register that makes no effect on current display. The saving function is requested by writing "1" to the SAVE_REQ register and this register will be cleared when saving is done. Before it is cleared, the TW2835 cannot accept new saving request. The SAVE_ADDR register defines address where an image will be saved. Because 4M bits is allocated for each 1 field image, SAVE_ADDR can have range with 4 ~ 11 because the first 0~ 3 and last 12 ~ 15 addresses are reserved for normal operation so that it cannot be used for saving function. To recall the saved video image, several parameters are required such as RECALL_FLD (1x03), RECALL_EN (1x11, 1x14, 1x19, 1x1C, 1x21, 1x24, 1x29, 1x2C) and RECALL_ADDR (1x12, 1x15, 1x1A, 1x1D, 1x22, 1x25, 1x2A, 1x2D) registers. If the RECALL_EN is "1", the TW2835 recalls the saved image that is located at the RECALL_ADDR in external memory and displays it just like incoming video. The RECALL_FLD register determines 1 field or 1 frame mode to display. The following Fig 28 illustrates the relationship between external SDRAM size and SAVE_ADDR / RECALL_ADDR. Techwell, Inc. www.techwellinc.com 53 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Overlapped with Display Bitmap Region (1 ~ 5 Page) SAVE_ADDR/ RECALL_ADDR 0 Reserved for Live 1 2 3 4 Odd Field 5 6 7 8 Even Field 9 10 11 12 Preliminary Reserved for Live 13 14 15 Save Possible Region Save Examples for Each Save Address In case of Full Image (720X288/240), 1 Picture can be saved In case of Quad Image (360X120/144), 4 Picture can be saved Fig 28 The relationship between SDRAM size and image Size Image Enhancement In non-realtime video such as frozen image, recalled image from saved images and playback input with multiplexed video source, the line flicker noise can be found in image because it displays same field image for both odd and even field. The embedded filter in the TW2835 can remove effectively this line flicker noise and be enabled via the ENHANCE (1x11, 1x14, 1x19, 1x1C, 1x21, 1x24, 1x29, 1x2C) register for each channel. This filter coefficient can be controlled via the FR_EVEN_OS and FR_ODD_OS (1x0B) register. The TW2835 also supports an automatic image enhancement mode via the AUTO_ENHANCE (1x05) register that is checking the channel operation mode such as recalling the saved or frozen image and then enabling the enhancement filter. Zoom Function The TW2835 supports high performance 2X zoom function in the vertical and horizontal direction for display path. The zoom function can be working in any operation mode such as live, strobe and switch mode. Conventional system also has zoom function, but it has a very poor quality due to line flicker noise even though interpolation filter is adapted. The TW2835 provides high quality zoom characteristics using a high performance interpolation filter and image enhancement technique. When zoom is executed, the image enhancement is operated automatically and the zoom filter coefficient can be controlled via the ZM_EVEN_OS and ZM_ODD_OS (1x0B) register. The zoomed region will be defined with the ZOOMH (1x0D) and ZOOMV (1x0E) registers and can be displayed via the ZMBNDCOL, ZMBNDEN, ZMAREAEN, ZMAREA (1x0C) register. The zoom operation is enabled via the ZMENA (1x0C) register. Techwell, Inc. www.techwellinc.com 54 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary The TW2835 also supports only horizontal direction zoom via the H_ZM_MD (1x0C) register. This mode is useful to display full size from playback input with CIF format (360x240 @ NTSC, 360x288 @ PAL). In this mode, ZOOMV register is useless because vertical direction has no meaning in this mode. Picture Size and Popup Control Each channel region can be defined using its own PICHL (1x30, 1x34, 1x38, 1x3C, 1x40, 1x44, 1x48, and 1x4C), PICHR (1x31, 1x35, 1x39, 1x3D, 1x41, 1x45, 1x49, and 1x4D), PICVT (1x32, 1x36, 1x3A, 1x3E, 1x42, 1x46, 1x4A, and 1x4E), and PICVB (1x33, 1x37, 1x3B, 1x3F, 1x43, 1x47, 1x4B, and 1x4F) register. If more than 2 channels have same region, there will be a conflict of what to display for that area. Generally the TW2835 defines that the channel 0 has priority over channel 7. So if a conflict happens between more than 2 channels, the channel 0 will be displayed first as top layer and then channel 1 and 2 and 3 are hidden beneath. The TW2835 also provides a channel pop-up attribute via the POP_UP (1x10, 1x13, 1x18, 1x1B, 1x20, 1x23, 1x28, and 1x2B) register to give priority for another display. If a channel has pop-up attribute, it will be displayed as top layer. This feature is used to configure PIP (Picture-InPicture) or POP (Picture-Out-Picture). The following Fig 29 shows the channel definition and priority for display path. H=0 V=0 PICVT0 POP_UP2 = 0 H = 180 PICVB0 POP_UP0 = 0 POP_UP1 = 1 PICHL0 PICHR0 V = 120/144 Fig 29 The channel position and priority in display path Techwell, Inc. www.techwellinc.com 55 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Full Triplex Function The TW2835 provides a full triplex function that implies to support four channel live, four channel playback display and four channel record output. The playback input is selected via the PB_PATH_EN (1x10, 1x13, 1x18, 1x1B, 1x20, 1x23, 1x28, and 1x2B) register for display path and the selected channel is updated automatically from the channel ID decoder via the PB_CH_NUM (1x16, 1x1E, 1x26, and 1x2E) register. The auto-cropping and auto-strobe mode is very useful to display the playback input with multiplexed or dual page video format. (A detailed description for playback path is referred to "Playback Path Control" Chapter, page 57) The TW2835 also supports pseudo 8 channel display mode with any picture configuration for non-realtime application. The TW2835 has a respective strobe request bit for each channel (STRB_REQ, 1x03 register) so that the channel is updated easily by host after the analog switch is changed. The following Fig 30 shows an illustration of pseudo 8-channel system. V=0 CH 0-A CH 1-A CH 2-A Background CH 3-A CH 0-B V = 120/144 CH 1-B H=0 CH 2-B CH 3-B H = 180 Fig 30 Pseudo 8 channel display operation Techwell, Inc. www.techwellinc.com 56 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Playback Path Control The TW2835 supports the playback function for variable record mode input such as normal record mode, frame record mode, DVR normal record mode, and DVR frame record mode. The TW2835 also provides auto cropping and auto strobe function for playback input through auto channel ID decoding. The auto strobe function implies that the selected channel is updated automatically from the playback input of the time-multiplexed full D1, CIF or Quad record format. If the channel operation mode is live mode (FUNC_MODE = "0"), the playback input can be bypassed in display path, but the auto cropping function from the channel ID decoder is available to separate each channel from the multi-channel format such as QUAD (Auto cropping function is described in "Cropping Function" section, page 34). The displayed channel can be selected via the PB_CH_NUM (1x16, 1x1E, 1x26, and 1x2E) register. If the channel operation mode is strobe mode (FUNC_MODE = "1"), the auto strobe function is used to update the channel automatically for the playback input of the time-multiplexed full D1, CIF or Quad record format through channel ID decoder. The auto strobe function is enabled by the PB_AUTO_EN (1x16) and PB_CH_NUM (1x16, 1x1E, 1x26, and 1x2E) register and can also be used for pseudo 8 channel display of playback input with the dual page mode or pseudo 8 channel MUX mode. The TW2835 supports event strobe mode with event information in auto channel ID. It makes the channel updated whenever event information in auto channel ID is detected. The event strobe mode can be enabled via the EVENT_PB (1x16, 1x1E, 1x26, and 1x2E) register. The TW2835 provides an anti-rolling function for the case of changing the picture configuration in playback application through the PB_STOP (1x16, 1x1E, 1x26, and 1x2E) register. If the PB_STOP is set to high in strobe operation mode (FUNC_MODE = "1"), the channel is not updated until the PB_STOP is set to low after picture configuration is changed. To remove the image shaking from the playback input of frame switching mode, the TW2835 also supports frame to field conversion in auto strobe mode via the FLD_CONV (1x16, 1x1E, 1x26, and 1x2E) register. It makes the channel updated with only 1 field even though the playback input is made up of frame. Techwell, Inc. www.techwellinc.com 57 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Normal Record Mode Preliminary The TW2835 provides various playback functions for normal record mode input. For playback input of live mode, the FUNC_MODE should be set to "0" and then it can be bypassed and displayed in live mode. For playback input of multiplexed record format, the FUNC_MODE should be set into "1" and then the auto strobe function is used for automatic display of the selected channel. . The following Fig 31 shows the examples of playback function for normal record mode using bypass, auto cropping, scaling, repositioning, and popup control. Playback Input (QUAD) 1. Bypass (1Ch) Display Path Output 2. Bypass + Scaling (1Ch) 3. Bypass + Crop (1Ch) CH0 CH1 4. Crop + Reposition (4Ch) CH1 CH2 CH0 CH1 CH0 CH1 CH2 CH3 CH1 (Live) CH3 CH1 (Live) CH2 CH3 CH2 CH3 CH2 (Live) CH3 (Live) CH2 (Live) CH3 (Live) CH3 CH0 5. Crop + Reposition + Scaling + Popup (5Ch) CH0 CH0 (Live) CH1 CH2 CH3 6. Crop + Reposition + Scaling + Popup (8Ch) CH0 (Live) CH0 CH1 (Live) CH1 7. Crop + Reposition + Scaling + Popup (8Ch) CH1 CH1 (Live) CH3 (Live) CH3 CH2 CH2 (Live) CH0 (Live) CH0 8. Crop + Reposition + Scaling + Popup (8Ch) CH0 CH1 (Live) CH1 CH3 (Live) CH0 (Live) CH2 CH2 (Live) CH3 CH2 (Live) CH2 CH3 (Live) CH3 Fig 31 The examples of the playback function for normal record mode The following Fig 32 shows the various display examples for various playback input format using auto strobe function. Playback Input 1. Dual Page CH0 CH2 CH1 CH3 CH4 CH6 CH5 CH7 Bypass (1Ch) Display Path Output (Max 8 Ch Display in 1 Chip) Scaling + Strobe (1Ch) CH0 CH1 CH2 CH3 Scaling + Strobe (2Ch) CH0 CH1 CH4 CH5 CH2 CH3 CH6 CH7 Crop + Strobe (1Ch) Crop + Strobe (4Ch) Crop + Scale + Strobe (4Ch) CH0 CH2 CH1 CH3 CH1 (Live) CH0 CH1 (Live) CH1 CH3 CH2 CH0 CH1 CH2 CH3 CH0 CH4 CH2 CH3 (Live) (Live) Scaling + Strobe (1Ch) CH4 CH5 CH6 CH7 CH2 (Live) CH3 (Live) CH2 CH3 (Live) (Live) Crop + Strobe (4Ch) CH5 CH6 CH7 Crop + Strobe + scale (8Ch) 2. 16Ch Quad-MUX CH0 CH2 CH1 CH3 CH4 CH6 CH5 CH7 Bypass (1Ch) Crop + Strobe (1Ch) Crop + Strobe + scale (8Ch) CH0 CH2 CH1 CH3 CH1 (Live) CH0 CH1 (Live) CH1 CH3 CH2 CH0 CH1 CH2 CH3 CH0 CH1 (Live) (Live) CH0 CH2 CH3 (Live) (Live) CH1 CH2 CH3 CH0 CH4 CH2 CH3 (Live) (Live) Crop + Strobe (2Ch) CH2 CH3 (Live) (Live) Crop + Scale + Strobe (1Ch) CH5 CH6 CH7 3. Switch mode Strobe (1Ch) Crop + Scale + Strobe (4Ch) CH0 CH0 CH1 CH0 CH2 (Live) CH1 CH3 (Live) CH1 CH3 CH2 CH0 CH1 CH2 CH3 CH0 CH3 CH0 CH1 CH2 CH1 CH2 CH3 CH0 CH0 CH1 CH2 CH3 4. Pseudo-8Ch MUX Strobe (1Ch) Crop + Strobe (1Ch) Crop + Scale + Strobe (4Ch) Crop + Scale + Strobe (4Ch) CH0 CH0 CH5 CH0 CH2 (Live) CH4 CH3 (Live) CH1 CH3 CH2 CH0 CH1 CH2 CH3 CH0 CH1 (Live) (Live) CH0 CH2 CH3 (Live) (Live) CH1 CH2 CH3 CH0 CH0 CH1 CH2 CH3 CH0 CH4 CH1 CH2 CH3 CH5 CH6 CH7 Fig 32 The example of auto strobe function for normal record mode Techwell, Inc. www.techwellinc.com 58 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Frame Record Mode The TW2835 supports the playback function for frame record mode input. The playback input of frame record mode is formed with 1 frame so that the vertical lines of each playback channel have twice as many as the normal record mode. So if the displayed channel size is half size of the playback input in vertical direction, the playback input can be separated into two (odd/even) fields according to the line numbers such as odd line for odd field and even line for even field. With this conversion, the vertical resolution of the playback input can be enhanced compared with simple half vertical scaling of the playback input. This mode can be enabled via the FIELD_OP (1x12, 1x15, 1x1A, 1x1D, 1x22, 1x25, 1x2A, and 1x2D) register. The following Fig 33 shows the various display examples with auto cropping, auto strobe, and scaling function for playback input using frame record mode. Playback Input (Frame Record Mode) 1. Strobe (2Ch) Display Path Output 2. Strobe + Scale (2Ch) CH0 CH2 3. Strobe + Scale + Crop (1Ch) CH1 CH1 (LIVE) 4. Crop + Scale + Strobe (4Ch) CH1 CH2 CH0 CH1 CH0 CH1 CH2 (LIVE) CH3 (LIVE) CH2 (LIVE) CH3 (LIVE) CH3 CH0 5. Crop + Scale + Strobe (1Ch) CH2 CH3 CH1 (LIVE) CH3 CH1 6. Crop + Scale + Strobe (8Ch) CH0 CH1 (LIVE) (LIVE) CH1 CH2 CH3 CH0 CH2 CH3 (LIVE) (LIVE) 7. Crop + Scale + Strobe (8Ch) CH1 CH2 CH0 CH1 (LIVE) (LIVE) CH2 CH3 (LIVE) (LIVE) CH3 CH0 Fig 33 The examples of the playback function for frame record mode The following Fig 34 shows the illustration of this conversion from frame record mode to normal display mode in playback application. Techwell, Inc. www.techwellinc.com 59 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Frame Record Mode (Frame-Quad) (Play back Input) Pixels 0 360 720 Vertical Blanking (Odd) CH0 (Odd Line) C H 0 (E Preliminary Normal Display Mode (Quad) Pixels 360 Vertical Blanking (Odd) 0 0 720 0 120/144 ne ) CH 0 CH 3 CH 3 ve n Li Lines 240/288 CH 0 CH 1 Vertical Blanking (Even) 240/288 0 CH 2 CH 1 Vertical Blanking (Even) 360/432 CH 0 CH 3 480/576 CH 2 CH 3 480/576 CH 2 CH 1 Input Video is Frame Quad (360 pixels X 240 Lines / Ch) Vertical is divided to 2 Horizontal is divided to 2 Output Video is divided to Odd/Even (360 pixels X 120 Lines / Ch * 2 Field) Odd Line Data go to Odd Field. Even Line Data go to Even Field. Fig 34 The conversion from frame record mode to normal display mode The TW2835 also supports only horizontal zoom mode via the H_ZM_MD (1x0C) register. This mode is useful to display the playback input of frame record mode to full size image. The following Fig 35 shows the illustration of this conversion in playback application. Frame Record Mode (Frame-Quad) (Play back Input) Pixels 0 360 720 Vertical Blanking (Odd) Strobe Mode (2 Ch) + Enhance Strobe Mode (2 Ch) + H Only Zoom + Enhance 0 0 360 720 0 720 240/288 CH 0 CH 1 Vertical Blanking (Even) CH 2 ZOOMH = 0 480/576 CH 2 CH 3 CH 1 CH 2 Input Video is Frame Quad (360 pixels X 240 Lines / Ch) Vertical is divided to 2 Horizontal is divided to 2 Output Video is 2 Channel with Half Size (360 pixels X 480 Lines / Ch) Output Video is 1 Channel with Full Size (720 pixels X 480 Lines / Ch) Fig 35 The conversion from frame record mode to full image Techwell, Inc. www.techwellinc.com 60 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary DVR Normal Record Mode If the playback input is the DVR normal record mode, it cannot be displayed directly because it is special mode not for display but for record to compression part. The TW2835 supports the conversion from this DVR normal record mode to normal display mode via the DVR_IN (1x12, 1x15, 1x1A, 1x1D, 1x22, 1x25, 1x2A, and 1x2D) register. For auto cropping function of the playback with this mode, the PB_CROP_MD (0x38) register should be set into "1" to crop the 1/4 vertical picture size (Please refer to "Cropping and Scaling Function for Playback" section in Page 34). The following Fig 36 shows the illustration of conversion from DVR normal record mode to normal display mode in playback application. DVR Record Mode In Quad Size (Play back Input) Pixels 360 Normal Display Mode In Quad Size 720 0 Pixels 360 720 0 0 0 60/72 Lines 120/144 120/144 Lines 180/216 240/288 240/288 Output Video is Monitor display mode (360 pixels X 120 Lines / Ch) No scaling & DVR_IN = "1" (Odd/Even Line is gathering to 1 region) Odd line Even line Input Video is DVR display mode. (720 pixels X 60 Lines / Ch) Vertical is divided to 4 region Fig 36 The conversion from DVR normal record mode to normal display mode The TW2835 supports all channel attributes in this mode except the scaling function for vertical direction. So the picture size in this mode will be fixed to Quad (360x120). Techwell, Inc. www.techwellinc.com 61 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary DVR Frame Record Mode The TW2835 also provides the conversion from DVR frame record mode to normal display mode using combination of frame record mode and DVR normal record mode via the DVR_IN and FIELD_OP (1x12, 1x15, 1x1A, 1x1D, 1x22, 1x25, 1x2A, and 1x2D) register. The following Fig 37 shows the illustration of conversion from DVR frame record mode to normal display mode in playback application. DVR Frame Record Mode (Frame-Quad) (Play back Input) 0 0 Pixels 360 Vertical Blanking (Odd) Left Half Line Ri gh tH Normal Display Mode (Quad) 0 0 Pixels 360 Vertical Blanking (Odd) 720 720 120/144 CH 0 120/144 CH 0 CH 1 a lf Li n e Lines 240/288 CH 1 Vertical Blanking (Even) 240/288 0 CH 2 CH 3 Vertical Blanking (Even) 360/432 CH 2 120/144 CH 0 CH 1 480/576 CH 3 Input Video is Frame Quad (720 pixels X 120 Lines / Ch) Vertical is divided to 4 Horizontal is divided to 1 240/288 CH 2 CH 3 Output Video is divided to Odd/Even (360 pixels X 120 Lines / Ch * 2 Field) Left Half Line Data go to Odd Field. Right Half Line Data go to Even Field. Fig 37 The conversion from DVR frame record mode to normal display mode Like DVR normal record mode, all channel attributes can be supported, but the scaling function cannot be supported in this mode. So the channel size will be fixed to Quad size. To implement PIP or POP application with smaller size than Quad, only odd line data is used with channel size definition, scaling and enhancement function. Techwell, Inc. www.techwellinc.com 62 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Like frame record mode, the only horizontal zoom mode is useful to display the playback input of DVR frame record mode to full size image via the DVR_IN and H_ZM_MD (1x0C) register. The following Fig 38 shows the illustration of this conversion from DVR frame record mode to normal display mode for full image in playback application. DVR Frame Record Mode (Play back Input) 0 0 Pixels 360 Vertical Blanking (Odd) 720 Normal strobe Mode (2 Ch) + + DVR_IN + Enhance Normal strobe Mode (2 Ch) + H Only Zoom + DVR_IN + Enhance 0 120/144 CH 0 360 720 0 720 Lines 240/288 CH 1 Vertical Blanking (Even) CH 2 CH 2 CH 1 CH 1 360/432 ZOOMH = 90 480/576 CH 3 Input Video is Frame Quad (720 pixels X 120 Lines / Ch) Vertical is divided to 4 Horizontal is divided to 1 Output Video is 2 Channel with Half Size (360 pixels X 480 Lines / Ch) Output Video is 1 Channel with Full Size (720 pixels X 480 Lines / Ch) Fig 38 The conversion from DVR frame record mode to normal display mode for full image Techwell, Inc. www.techwellinc.com 63 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Record Path Control The TW2835 supports 4 record modes such as normal record mode, frame record mode, DVR record mode and DVR frame record mode. The DVR record mode and DVR frame record mode generate continuous video stream for each channel and transfer it to compression part (MJPEG or MPEG) so that they are very useful for DVR application. The frame record mode can be used to record each channel with full vertical resolution. Especially the TW2835 includes a noise reduction filter in record path so that it can reduce spot noise and then provide less compression file size. The record mode is selected via the DIS_MODE and FRAME_OP (1x51) register. If the FRAME_OP is "0", the DIS_MODE = "0" stands for normal record mode and the DIS_MODE = "1" represents DVR record mode. If the FRAME_OP is "1", the DIS_MODE = "0" stands for frame record mode and the DIS_MODE = "1" represents DVR frame record mode. The TW2835 supports high performance free scaler vertically and horizontally in display path, but has the size and position limitation such as Full / Quad / CIF in record path. The TW2835 also provides four channel real-time record mode with full D1 format using DLINKI and MPP1/2 pin. Techwell, Inc. www.techwellinc.com 64 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Normal Record Mode Each channel position and size can be defined using its own PIC_SIZE (1x6C), and PIC_POS (1x6D) register. The channel size is defined via the PIC_SIZE register such as "0" for horizontal and vertical half size (QUAD), "1" for horizontal full size and vertical half size, "2" for horizontal half size and vertical full size, and "3" for horizontal and vertical full size. The channel position is defined via the PIC_POS register such as "0" for no horizontal and vertical offset, "1" for only horizontal half offset, "2" for only vertical half offset, and "3" for horizontal and vertical half offset. The channel size and location should be defined within the full picture size. (i.e. PIC_SIZE = "3" & PIC_POS = "2" is not allowed) The horizontal full size of picture is controlled via the SIZE_MODE (1x51) register such as "0" for 720 pixels, "1" for 702 pixels, and "2" for 640 pixels. Likewise, the vertical full size is selected by the SYS5060 (1x00) register such as "0" for 240 lines and "1" for 288 lines. If more than 2 channels have same region, there will be a conflict of what to display for that area. Generally the TW2835 defines that the channel 0 has priority over channel 3. So if a conflict happens between more than 2 channels, the channel 0 will be displayed first as top layer and then the channel 1, 2 and 3 are hidden beneath. The TW2835 also provides a channel pop-up attribute via the POP_UP (1x60, 1x63, 1x66, and 1x69) register to give priority for another display. If a channel has pop-up attribute, it will be displayed as top layer. The following Fig 39 shows the example of the channel position and size control in normal record mode. Horizontal Direction (H) PIC_SIZE = 0 PIC_POS = 0 PIC_SIZE = 0 PIC_POS = 1 Vertical Direction (V) CH 0 PIC_SIZE = 0 PIC_POS = 2 CH 1 PIC_SIZE = 0 PIC_POS = 3 CH 2 CH 3 Fig 39 The channel position and size control in normal record mode Techwell, Inc. www.techwellinc.com 65 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Frame Record Mode The frame record mode is similar to normal record mode except that the definition of picture size is extended to frame area and only one field data can be output in 1 frame. The odd or even field selection is controlled via the FRAME_FLD (1x51) register. Like normal record mode, each channel position and size are defined using its own PIC_SIZE (1x6C), and PIC_POS (1x6D) register. The channel size is defined via the PIC_SIZE register such as "0" for horizontal half size and vertical full size, "1" for horizontal and vertical full size, but "2" or "3" is not allowed. That is, the channel size for vertical direction supports only one field size. The channel position is defined via the PIC_POS register such as "0" for no horizontal and vertical offset, "1" for only horizontal half offset, "2" for only vertical 1 field offset, and "3" for horizontal half picture offset and vertical 1 field offset. The channel size and location should be defined within the full picture size. In frame record mode, the TW2835 also supports the full operation mode such as live, strobe or switch operation and provides a pop-up attribute via the POP_UP register. The Fig 40 shows the example of the channel position and size control in frame record mode. N o rm a l R e c o rd M o d e (Q u a d ) (P IC _ S IZ E = 0 ) V e r t ic a l B la n k i n g F ra m e R e c o rd M o d e (F ra m e -Q u a d ) (P IC _ S IZ E = 0 ) V e r t ic a l B la n k i n g 0 0 Output Data of Odd Field P IC _ P O S = 0 P IC _ P O S = 1 2 4 0 /2 8 8 P IC _ P O S = 2 P IC _ P O S = 3 V e r t ic a l B la n k i n g 2 4 0 /2 8 8 P IC _ P O S = 0 P IC _ P O S = 1 V e r t ic a l B la n k i n g Output Data of Even Field P IC _ P O S = 0 P IC _ P O S = 1 P IC _ P O S = 2 4 8 0 /5 7 6 P IC _ P O S = 3 4 8 0 /5 7 6 P IC _ P O S = 2 P IC _ P O S = 3 V id e o In p u t fo r E a c h C h a n n e l S c a le r a tio fo r H o riz o n ta l : 1 /2 S c a le r a tio fo r V e rtic a l : 1 / 2 V id e o In p u t fo r E a c h C h a n n e l S c a le r a tio fo r H o riz o n ta l : 1 /2 S c a le r a tio fo r V e r tic a l : 1 Fig 40 The channel position and size control in frame record mode Techwell, Inc. www.techwellinc.com 66 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in Output Data of Even Field Output Data of Odd Field TW2835 Video and Audio Controller Preliminary DVR Normal Record Mode The DVR normal record mode outputs the continuous video stream for compression part (MJPEG or MPEG) in DVR application. Like normal record mode, each channel position and size can be defined using its own PIC_SIZE (1x6C), and PIC_POS (1x6D) register. The channel size is defined via the PIC_SIZE register such as "0" for horizontal and vertical half size (QUAD), "1" for horizontal full size and vertical half size, "2" for horizontal half size and vertical full size, and "3" for horizontal and vertical full size. The channel position is defined via the PIC_POS register such as "0" for no vertical offset, "1" for vertical 1/4 picture offset, "2" for vertical 1/2 picture offset and "3" for vertical 3/4 picture offset. The channel size and location should be defined within the full picture size. In DVR normal record mode, the TW2835 also supports the full operation mode such as live, strobe or switch operation and provides a pop-up attribute via the POP_UP register. But the channel boundary is not supported in DVR normal record mode. The following Fig 41 shows the example of the channel position and size control in DVR normal record mode. Normal Record Mode (Quad) (PIC_SIZE = 0) 0 0 Pixels 360 720 00 DVR Normal Record Mode (Quad) (PIC_SIZE = 0) Pixels 360 720 PIC_POS 00 60/72 Lines 120/144 PIC_POS = 0 PIC_POS = 1 60/72 01 120/144 10 180/216 240/288 PIC_POS = 2 PIC_POS = 3 180/216 11 240/288 Odd line Even line Output Video is scaled to Quad (720 pixels X 60 Lines / Ch) Vertical is divided to 4 region Output Video is scaled to Quad (360 pixels X 120 Lines / Ch) Vertical is divided to 2 Horizontal is divided to 2 Fig 41 The channel position and size control for DVR normal record mode Techwell, Inc. www.techwellinc.com 67 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary DVR Frame Record Mode The DVR frame record mode is the combination of frame record mode and DVR normal record mode. The odd or even field selection is controlled via the FRAME_FLD (1x51) register like frame record mode. The TW2835 also supports the full operation mode such as live, strobe or switch operation, but the channel boundary is not supported in DVR frame record mode. Like frame record mode, each channel position and size can be defined using its own PIC_SIZE (1x6C), and PIC_POS (1x6D) register. The channel size is defined via the PIC_SIZE register such as "0" for horizontal half size and vertical full size, "1" for horizontal and vertical full size, but "2" or "3" is not allowed. The channel position is defined via the PIC_POS register such as "0" for no horizontal and vertical offset, "1" for vertical half offset, "2" for vertical 1 field offset, and "3" for vertical 1 and half field offset. The channel size and location should be defined within the full picture size. The following Fig 42 shows the example of DVR frame record mode. Frame Record Mode (Frame-Quad) (PIC_SIZE = 0) 0 0 Pixels 360 Vertical Blanking (Odd) 0 720 DVR Frame Record Mode (Frame-Quad) (PIC_SIZE = 0) 0 Pixels 360 Vertical Blanking (Odd) 720 120/144 PIC_POS = 0 Lines 240/288 PIC_POS = 0 PIC_POS = 1 Vertical Blanking (Even) 240/288 PIC_POS = 1 Vertical Blanking (Even) 360/432 PIC_POS = 2 480/576 PIC_POS = 2 PIC_POS = 3 480/576 PIC_POS = 3 Odd line Even line Output Video is scaled to Frame Quad (360 pixels X 240 Lines / Ch) Vertical is divided to 2 Horizontal is divided to 2 Output Video is scaled to Frame Quad (720 pixels X 120 Lines / Ch) Vertical is divided to 4 Horizontal is divided to 1 Fig 42 The channel position and size control for DVR frame record mode Techwell, Inc. www.techwellinc.com 68 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Noise Reduction The TW2835 includes a noise reduction filter in record path and the characteristic can be controlled via the TM_WIN_MD (1x53), MEDIAN_MD, TM_SLOP, and TM_THR (1x50) register. But this noise reduction filter is only available for normal record mode. The TM_WIN_MD register defines window type to reduce spot noise as "0" for 3X3 matrix, "1" for cross matrix, "2" for multiplier matrix, and "3" for vertical bar matrix. The MEDIAN_MD defines the noise reduction filter mode as "0" for adaptive threshold median filter mode, "1" for normal median filter mode. For adaptive threshold median filter mode, the TW2835 has crosscorrelation detector for noise detection. If cross-correlation value is over than TM_THR of noise threshold level, the noise reduction filter will be operated according to the graph defined by the TM_SLOP register. The following Fig 43 shows the slope control for adaptive threshold median filter mode. 1 TM_SLOP = 0 TM_SLOP = 1 TM_SLOP = 2 TM_SLOP = 3 Y(i,j) = TM[x(i,j)] = (1- ) x(i,j) + M(i,j) 0 TM_THR Cross-corelation Fig 43 The slope control for adaptive threshold median filter mode The TW2835 supports the noise reduction filter for each channel via the NR_EN (1x60, 1x63, 1x66, and 1x69) register. The TW2835 also supports auto noise reduction filter mode via the AUTO_NR_EN (1x55) register that is enabled when night is detected. Additionally the TW2835 has programmable black level of luminance component in record path to reduce the black spot noise via the LIM_656_Y (0xC1, and 0xC2) register. Techwell, Inc. www.techwellinc.com 69 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Channel ID Encoder The TW2835 supports the channel ID encoding to detect the picture information in video stream for record path. The TW2835 has three kinds of channel ID such as User channel ID, Detection channel ID and Auto channel ID. The User channel ID is used for customized information such as system information and date. The Detection channel ID is used for detected information of current live input such as motion, video loss, blind and night detection. The Auto channel ID is employed for automatic identification of picture configuration such as video input path number with cascaded stage, analog switch, event, region enable, and field/frame mode information. The TW2835 also supports both analog and digital type channel ID during VBI period. Channel ID Information The channel ID can be composed of 8 byte User channel ID, 8 byte Detection channel ID and 4 byte Auto channel ID. The User channel ID is defined by user and may be used for system information, date and so on. The Detection channel ID is used for the detected information such as video loss state, motion, blind and night detection. The Auto channel ID is used to identify the current picture configuration. Basically the Auto channel ID has 4 byte data that contains 4 region channel information in one picture such as QUAD split image. That is, each region has 1 byte channel information. The Auto channel ID format is described in the following Table 4. Bit 7 6 5 4 [3:2] [1:0] Name REG_EN EVENT FLDMODE ANAPATH CASCADE VIN_PATH Table 4. The Auto channel ID information Function Region Enable Information New Event Information Sequence Unit (0 : Frame, 1 : Field) Analog switch information Cascaded Stage Information Video Input Path Number (depending on DEC_PATH_Y) The REG_EN is used to indicate whether the corresponding 1/4 region is active or blank. The EVENT is used to denote the updating information of each channel in live, strobe or switch operation. Especially the EVENT information is very useful for switch operation or non-realtime application such as pseudo 8ch or dual page mode because each channel can be updated whenever EVENT is detected. The FLDMODE is used to denote the sequence unit such as frame or field. The ANAPATH is used to identify the analog switch information in the channel input path. The ANAPATH information is required for non-realtime application such as pseudo 8ch, dual page or pseudo 8channel MUX application using analog switch. The CASCADE is used to indicate the cascaded stage of channel in chip-to-chip cascaded application. The VIN_PATH information is used to indicate the video input path of channel. Four bytes of Auto channel ID can be distinguished by its order. The first byte of Auto channel ID defines the left top region channel. Likewise the second byte defines the right top, the third byte defines the left bottom and the fourth byte defines the right bottom region channel in one Techwell, Inc. www.techwellinc.com 70 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary picture. The following Fig 44 shows the example of Auto channel ID for various recording output formats. Normal (QUAD Frame) Auto Channel ID Frame (Odd Field) Auto Channel ID A0 = "1110_0001 DVR Frame (Odd Field) Auto Channel ID CH0 CH0 CH2 CH2 CH1 CH1 CH3 CH3 A0 = "1100_0000 A1 = "1100_0001 A2 = "1100_0010 A3 = "1100_0011 CH1 CH1 A0 = "1110_0001 A1 = "1110_0001 A2 = "1110_0010 A3 = "1110_0010 CH1 CH2 A1 = "1110_0010 A2 = "1110_0001 A3 = "1110_0010 CH2 CH2 Normal (Full Frame) Auto Channel ID A0 = "1100_0000 Frame (Even Field) Auto Channel ID A0 = "1110_0000 DVR Frame (Even Field) Auto Channel ID CH0 CH0 A0 = "1110_0000 A1 = "1110_0000 A2 = "1110_0011 CH0 CH0 A1 = "1100_0000 A2 = "1100_0000 A3 = "1100_0000 CH0 CH3 A1 = "1110_0011 A2 = "1110_0000 A3 = "1110_0011 CH3 CH3 A3 = "1110_0011 DVR Normal Full Field (Ch 3) Full Field (Ch 0) Auto Channel ID Auto Channel ID A0 = "1110_0000 A0 = "1110_0011 CH0 CH0 CH1 CH1 CH2 CH2 CH3 CH3 CH0 CH0 CH1 CH1 CH2 CH2 CH3 CH3 Auto Channel ID A0 = "1100_0000 A1 = "1100_0001 A2 = "1100_0010 CH3 A1 = "1110_0011 A2 = "1110_0011 A3 = "1110_0011 CH0 A1 = "1110_0000 A2 = "1110_0000 A3 = "1110_0000 A3 = "1100_0011 Fig 44 The example of auto channel ID for various record output formats Techwell, Inc. www.techwellinc.com 71 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary The Detection channel ID consists of 2 bytes because each channel requires 4 bits for video loss, motion, blind and night detection information. The detailed Detection channel ID format is described in the following Table 5. Bit 3 2 1 0 Name NOVID MD_DET BLIND_DET NIGHT_DET Table 5. The Detection channel ID information Function Video loss Information (0 : Video is Enabled, 1 : Video loss) Motion Information (0 : No Motion, 1 : Motion) Blind Information (0 : No Blind, 1 : Blind) Night Information (0 : Day, 1 : Night) In analog channel ID type, 4 byte information can be inserted in one line so that only the half line is required for 1 chip detection channel ID, but two lines are always reserved for detection channel ID in case of cascaded application. For cascaded application, max 8 bytes are needed for detection channel ID information. The order of those channel ID depends on the cascaded stage via the LINK_NUM (1x00) register. That is, the master chip information (LINK_NUM = "0") is output at first order and the last slave chip information (LINK_NUM = "3") at last. The TW2835 also supports non-realtime detection channel ID format via the VIS_DM_MD (1x83) register. The non-realtime detection channel ID requires 4 bytes for 8 channel information. So one line is used for it and the order is that VIN_A information (ANA_SW = "0") is output at first and VIN_B information at last. Techwell, Inc. www.techwellinc.com 72 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Analog Type Channel ID in VBI The TW2835 supports the analog type channel ID during VBI period. The analog channel ID can include an Auto channel ID, Detection channel ID and User channel ID. Each channel ID can be enabled via the VIS_AUTO_EN, AUTO_RPT_EN, VIS_DET_EN, VIS_USER_EN (1x80) registers. The Auto channel ID requires one line basically, but can need one more line for repetition. Both Detection channel ID and User channel ID require two lines so that total six lines are used for analog type channel ID. The vertical starting position of analog channel ID is controlled by the VIS_LINE_OS (1x83) register with 1 line unit and the horizontal starting position is defined via VIS_PIXEL_HOS(1x81) register with 2 pixel unit. The pixel width of each bit is controlled by the VIS_PIXEL_WIDTH (1x82) register and the magnitude of each bit is defined by the VIS_HIGH_VAL/VIS_LOW_VAL (1x84/1x85) register. The analog channel ID consists of run-in clock, channel ID data, type and parity bit. The run-in clock insertion is enabled via the VIS_RIC_EN (1x80) register. The channel ID data can include 4 byte information and the channel ID type contains 3 bits that "0" is meant for Auto channel ID, "1" for repeated channel ID, "2" for Detection channel ID of master and first slave stage chip, "3" for Detection channel ID of second and third slave chip, "4" for User channel ID of VIS_MAN0~3, and "5" for User channel ID of VIS_MAN4~8. The parity is 1 bit width and used for even parity. The analog channel ID is located right after digital channel ID line. The following Fig 45 shows the illustration of analog channel ID. Video Output H V VIS_LINE_OS + VIS_FLD_OS F Digital Channel ID Analog Channel ID Format VIS_PIXEL_HOS VIS_HIGH_VAL Run-In Clock User Channel ID Detection Channel ID Auto Channel ID Parity A0 = 11000000 VIS_LOW_VAL VBI_HW A1 = 11000001 A2 = 11000010 A2 = 11000010 Channel ID Type (*) * Channel ID Type of each line can be detected with Channel ID Type. Auto channel ID = 001 / 010 (Repeated channel ID) Detection Channel ID = 011 / 100 User Channel ID = 101 / 110 Fig 45 The illustration of analog channel ID Techwell, Inc. www.techwellinc.com 73 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Digital Type Channel ID in VBI The TW2835 also provides the digital type channel ID during VBI period. It's useful for DSP application because the channel ID can be inserted in just 1 line with special format. The digital channel ID is located before analog channel ID line. The digital channel ID can be enabled via the VIS_CODE_EN (1x80) register. The digital channel ID is inserted in Y data in ITU-R BT.656 stream and composed of ID # and channel information. The ID # indicates the index of digital type channel ID including the Start code, Auto/Detection/User channel ID and End code. The ID # has 0 ~ 63 index and each channel information of 1 byte is divided into 2 bytes of 4 LSB that takes "50h" offset against ID # for discrimination. The Start code is located in ID# 0 ~ 1 and the Auto channel ID is situated in ID# 2 ~ 9. The Detection channel ID is located in ID # 10 ~ 25 and the User channel ID is situated in ID # 26 ~ 41. The End code occupies the others. The digital channel ID is repeated more than 5 times during horizontal active period. The following Fig 46 shows the illustration of the digital channel ID. Video Output H V VBI_LINE_OS + VBI_FLD_OS F Digital Channel ID Digital Channel ID SAV P0 P1 P2 P3 Horizontal Active Period (1440 Pixel) P1440 EAV FFh 00h 00h XYh 00h 00h 00h 5Fh 00h 01h 00h 50h 00h 02h 00h 5Ch 00h 03h 00h 50h Cb SAV Y Cr Y 2nd Start Code 1st Auto Channel ID 2nd Auto Channel ID Full Ch ID Set = 256 Pixels 00h ID # Digital Channel ID Format Id # Data description 0 5Fh 1 50h 2 {0101, A0_MSB} ~ 9 10 {0101, D0_MSB} ~ ~ 25 { 0101, D7_LSB} 00h Data 00h 3Eh 00h 50h 00h 3Fh 00h 50h 00h 00h 1st Start Code 63th End Code 64th End Code Repeated Again 26 {0101, U0_MSB} ~ ~ 41 {0101, U7_LSB} 42 -{0101, 0000} End Code 63 ~ {0101, A3_LSB} Start Code Auto Channel ID (4 Bytes) Detection Channel ID (8 Bytes) User Channel ID (8 Bytes) Fig 46 The illustration of the digital channel ID in VBI period Techwell, Inc. www.techwellinc.com 74 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Digital Type Channel ID in Channel Boundary The TW2835 also supports the extra type of digital channel ID in horizontal boundary of each channel. This information can be used for very easy memory management of each channel in DSP solution because this digital channel ID information includes not only the channel information but also line number of picture. The Auto channel ID format is described in the following Table 6. Bit [15:7] 6 5 4 [3:2] [1:0] Name FIELD REG_EN ANAPATH CASCADE VIN_PATH Table 6 The digital channel ID information in active area Function Active Line number Field Polarity Information Region Enable Information Analog switch information Cascade Stage Information Video Input Path Number (depending on DEC_PATH_Y) LINENUM This digital channel ID is enabled in the horizontal active area by setting "1" to the CH_START (1x55) register. The following Fig 47 shows the digital channel ID in channel boundary. Video Output when SIZE_MODE = 2 0 0 320 Pixel # 640 720 CH 1 Line # CH 2 23h Digital Data for Channel ID Horizontal Active Period SAV P0 P1 P2 P3 Channel 1 Data P0 P1 P2 P3 Channel 2 Data P0 P1 P2 P3 Blank Data No channel Area EAV FFh 00h 00h XYh 21h 01h 23h 01h Cb SAV Y Cr Y 22h 01h 23h 01h Cb Y Cr Y 00h 01h 23h 01h Cb Y Cr Y CH 1 Start Code 00h 00h CH 2 Start Code No video Start Code Data { Linenum[8], ENC_FIELD, VALID, ANA_PATH, CASCADE(2 Bit), VIN_PATH(2Bit) } Linenum[7:0] Fig 47 The digital channel ID format in channel boundary Techwell, Inc. www.techwellinc.com 75 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Chip-to-Chip Cascade Operation The TW2835 supports chip-to-chip cascade connection up to 4 chips for 16-channel application and also provides the independent operation for display and record path. That is, the display path can be operated with cascade connection even though the record path is working in normal operation. Likewise, the cascade connection of record path is limited within 4 chips while the infinite cascade connection of display path can be supported for more than 16-channel application. In cascade operation, the TW2835 transfers all information of slaver chips to master chip including video data, zoom factors, switching information and 2D box except overlay information such as single box, mouse pointer and bitmap information. Therefore, the master chip should be controlled for overlay and the lowest slaver chip should be controlled for the others such as video data, zoom control and switching queue. Channel Priority Control When 2 channels are overlapped in chip-to-chip cascade operation for display path, there is a priority with the following order such as popup attributed channel of master device, popup attributed channel of slaver device, non-popup attributed channel of master device and nonpopup attributed channel of slaver device. Using this popup attribute, the TW2835 can implement the channel overlay such as PIP, POP, and full D1 format channel switching in chipto-chip cascade connection. For QUAD multiplexing record output in chip-to-chip cascade application, the popup priority of the channel is controlled via the QUAD_MUX queue. The QUAD_MUX operation is enabled via the POS_CTL_EN (1x70) register and the operation mode should be set into strobe operation (FUNC_MODE = "1"). If the POS_CTL_EN is "0", the channel position is defined via the PIC_POS (1x6D) register and the priority from top to bottom layer is controlled by the popup attribute like the display path. If the POS_CTL_EN is "1", the channel position and priority is controlled by the pre-defined queue or interrupt. The TW2835 supports the interrupt triggering via the POS_INTR (1x70), POS_CH (1x73, 1x74) register and also provides the internal or external triggering mode for the QUAD_MUX operation. The triggering mode is selected via the POS_TRIG_MODE (1x70) register such as "0" for external trigger mode and "1" for internal trigger mode. The QUAD_MUX queue size can be defined by the POS_QUE_SIZE (1x71) register. To change the channel popup sequence in internal queue, the POS_QUE_WR (1x75) register should be set to "1" after defining the queue address with the POS_QUE_ADDR (1x75) register and the channel number with the POS_CH (1x73, 1x74) register. The POS_QUE_WR register will be cleared automatically after updating queue. The QUAD_MUX queue is shared with the normal switching queue so that the maximum queue size for QUAD_MUX is 32 (=128/4) depth. Techwell, Inc. www.techwellinc.com 76 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary The QUAD_MUX switching period can be defined via the POS_QUE_PERIOD (1x72) register that has 1 ~ 1024 period range in the internal triggering mode. The switching period unit is controlled via the POS_FLD_MD (1x71) register as field or frame. If switching period unit is frame, switching will occur at the beginning of odd field. The internal field counter can be reset at anytime using the POS_CNT_RST (1x75) register that will be cleared automatically after set to "1". To reset an internal queue position, the POS_QUE_RST (1x75) register should be set to "1" and will be cleared automatically after set to "1". The structure of QUAD_MUX switching operation is shown in the following Fig 48. POS_QUE_ADDR POS_TRIG_MODE POS_QUE_RST POS_QUE_SIZE = 7 Q4 Q5 Q6 Q7 Q0 Q3 Q2 Q1 POS_QUE POS_WR POS_CH Internal Queue Queue Read/Write Control Internal Field Counter External Triggering Detector POS_PERIOD POS_CNT_RST POS_TRIG POS_INTR POS_CH Popup/position Interrupt Detector Popup/position Arbitration Popup/position Operation Control POS_OUT_CH Fig 48 The structure of QUAD_MUX switching operation when POS_SIZE = 7 For QUAD_MUX switching operation by field unit, the TW2835 supports an auto strobe mode for channel to be updated automatically with specific field data. The STRB_FLD (1x04, 1x54) register is used to select specific field data in strobe mode and the STRB_AUTO (1x07, 1x57) register is used to update it automatically. The QUAD_MUX operation has several limitations. The first is that the channel region should not be overlapped with other channel region via the PIC_SIZE and PIC_POS register. The second is that the channel position and popup property in live or strobe operation mode can be controlled by the popup/position control. But the channel position and priority in switch operation mode is determined by the QUAD_MUX queue. The third is that the POS_CH register in QUAD_MUX queue should be set as the following sequence that is the left top, right top, left bottom and right bottom position in the picture. The POS_CH register includes the cascade stage and channel number information. Techwell, Inc. www.techwellinc.com 77 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary 120 CIF/Sec Record Mode For chip-to-chip cascade connection, the DLINKI, VLINKI and HLINKI pin in master chip should be connected to VDOUTX, VSENC and HSENC pin in slaver chips. So the VDOUTX, VSENC and HSENC output pin is only available in master device when cascaded. The TW2835 has several registers for cascade operation such as the LINK_EN, LINK_NUM, LINK_LAST (1x00) and SYNC_DEL (1x7E) register. For lowest slaver chip, both LINK_LAST_X and LINK_LAST_Y should be set to "1". To receive the cascade data from slaver chip, either LINK_EN_X or LINK_EN_Y should be set to "1". To transfer the cascade data properly among the chips, the LINK_NUM and SYNC_DEL should be set properly in accordance with its order. The information of switching channel can be taken from master chip via the channel ID in video stream output or by reading the MUX_OUT_CH (1x08, 1x6E) register. The information of switching channel can also be taken from the lowest slaver chip via the MPP1/2 pins. The following Fig 49 illustrates the cascade connection for 120 CIF/Sec record mode. 4 Display (16ch Split) 5 time 0~3 Input PB Input 5 VIN0 VIN1 VIN2 VIN3 Record (16ch MUX) Record (Quad MUX) 139 40 51 14 15 10 6 11 7 2 3 Pop_up 128 Master (LINK_NUM =0) (SYNC_DEL = 4) (LINK_LAST_X=0, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=0, PBIN HLINKI LINK_EN_Y=1) DLINKI VLINKI VDOUTX 4 5 4197 0 10 13 6 14 2 3 12 8 11 5 15 12 8 5 3 13 3 3 switch time 9 10 13 5 7 6 12 15 4~7 Input VIN0 VIN1 VIN2 VIN3 Slave1 VSENC VDOUTX 4 12 8 (LINK_NUM=1) (SYNC_DEL = 2) (LINK_LAST_X=0, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=0, PBIN HLINKI LINK_EN_Y=1) DLINKI VLINKI 5 5 13 X 14 8 11 128 139 4 5 4 5 1410 1511 66 77 Pop_up switch 2 2 time 9 10 13 8~11 Input VIN0 VIN1 VIN2 VIN3 VDOUTX (LINK_NUM=2) (SYNC_DEL = 0) (LINK_LAST_X=0, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=0, PBIN HLINKI LINK_EN_Y=1) DLINKI VLINKI Slave2 VSENC 12 8 12 15 8 12 8 8 13 X 14 8 11 14 9 8 9 15 10 10 11 11 10 11 Pop_up 8 13 9 switch 1 1 time 12~15 Input VIN0 VIN1 VIN2 VIN3 VSENC VDOUTX (LINK_NUM=3) (SYNC_DEL=0) (LINK_LAST_X=1, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=1, PBIN HLINKI LINK_EN_Y=1) DLINKI VLINKI Slave3 13 14 12 12 12 12 13 12 15 switch 12 12 X 13 13 12 13 12 13 14 15 14 14 15 15 14 15 Pop_up switch Fig 49 The cascade connection for 120 CIF/sec record mode Techwell, Inc. www.techwellinc.com 78 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary 240 CIF/Sec Record Mode The TW2835 supports 240 CIF/Sec record mode in chip-to-chip cascade connection. In this case, the display path is composed of 4 chip cascade stage, but the record path consists of 2 chip cascade stage. That is, two lowest slaver chips for record path should be set with the LINK_LAST_Y = "1" and the switching channel information can be taken from two master chips for record path via the channel ID in video stream or by reading the MUX_OUT_CH (1x6E) register. The following Fig 50 illustrates the cascade connection for 240 CIF/Sec record mode. 4 Display (16ch Split) 6 Record (8ch MUX) time Record (Quad MUX) 0~3 Input PB Input 6 VIN0 VIN1 VIN2 VIN3 VDOUTX (LINK_NUM =0) (SYNC_DEL = 4) (LINK_LAST_X=0, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=0, PBIN HLINKI LINK_EN_Y=1) DLINKI VLINKI Master 4 6 4197 0 10 13 6 14 2 3 12 8 11 5 15 4 2 4 5 3 6 5 04 15 0 1 62 73 6 7 2 3 3 3 VSENC VDOUTX (LINK_NUM=1) HSENC (SYNC_DEL = 2) (LINK_LAST_X=0, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=1, HLINKI PBIN LINK_EN_Y=1) DLINKI VLINKI switch switch Pop_up Pop_up time 9 10 13 5 7 6 12 15 4~7 Input VIN0 VIN1 VIN2 VIN3 Slave1 4 4 4 5 5 44 6 X 14 8 11 55 44 55 6 7 66 77 6 7 Pop_up switch 2 2 5 switch switch Pop_up Record (8ch MUX) time Record (Quad MUX) 12 8 13 9 8 15 11 10 8~11 Input PB Input 5 VIN0 VIN1 VIN2 VIN3 VDOUTX (LINK_NUM=2) (SYNC_DEL = 0) HSENC (LINK_LAST_X=0, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=0, PBIN HLINKI LINK_EN_Y=1) DLINKI VLINKI Slave2 VSENC 5 9 10 13 14 8 11 12 15 12 8 13 9 14 12 14 13 15 14 10 9 11 switch 1 1 switch Pop_up Pop_up time 12~15 Input VIN0 VIN1 VIN2 VIN3 VSENC VDOUTX (LINK_NUM=3) (SYNC_DEL = 0) HSENC (LINK_LAST_X=1, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=1, PBIN HLINKI LINK_EN_Y=1) DLINKI VLINKI Slave3 13 14 12 12 13 13 14 12 15 switch 12 12 14 X 13 13 12 13 12 13 15 14 14 15 15 14 15 switch switch Pop_up Pop_up Fig 50 The cascade connection for 240 CIF/sec record mode Techwell, Inc. www.techwellinc.com 79 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary 480 CIF/Sec Record Mode The TW2835 also supports 480 CIF/Sec record mode in chip-to-chip cascade connection. In this case, the display path is composed of 4 chip cascade stage, but the record path has no cascade connection. Even though the record path has no cascade connection, the LINK_NUM should be set properly in accordance with its cascade order for correct channel number in channel ID and the LINK_EN_Y should be set to "0" or the LINK_LAST_Y should be set to "1". The TW2835 transfers the slaver chip information to master chip such as zoom control and 2D box only for display path and the switching channel information for record path can be taken from each chip via the channel ID in video stream or by reading the MUX_OUT_CH (1x6E) register. The following Fig 51 illustrates the cascade connection for 480 CIF/Sec record mode. 4 8 Display (16ch Split) 0~3 Input PB Input 8 VIN0 VIN1 VIN2 VIN3 VDOUTX (LINK_NUM=0) (SYNC_D EL = 4) (LINK_LAST_X=0, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=0, PBIN LINK_EN_Y=0) HLINKI VLINKI DLINKI time Record (4ch MU X or QUAD) Master 4 8 4197 0 10 13 6 14 2 3 12 8 11 5 15 01 23 0 2 1 3 3 3 7 Record (4ch MU X or QUAD) time 4~7 Input PB Input 7 VIN0 VIN1 VIN2 VIN3 VDOUTX (LINK_NUM=1) (SYNC_D EL = 2) (LINK_LAST_X=0, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=0, PBIN LINK_EN_Y=0) HLINKI VLINKI DLINKI Slave1 VSENC 4 7 9 10 13 5 14 8 11 7 6 12 15 57 46 4 6 5 7 2 2 6 Record (4ch MU X or QUAD) time 8~11 Input PB Input 6 VIN0 VIN1 VIN2 VIN3 VDOUTX (LINK_NUM=2) (SYNC_D EL = 0) (LINK_LAST_X=0, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=0, PBIN LINK_EN_Y=0) HLINKI VLINKI DLINKI Slave2 VSENC 6 9 10 13 14 8 11 12 15 89 10 11 8 10 9 11 1 1 5 Record (4ch MU X or QUAD) time 12~15 Input VIN0 VIN1 VIN2 VIN3 VDOUTX (LINK_NUM=3) (SYNC_D EL = 0) (LINK_LAST_X=1, LINK_EN_X=1) VDOUTY (LINK_LAST_Y=1, PBIN HLINKI LINK_EN_Y=0) VLINKI DLINKI Slave3 VSENC 13 5 14 PB Input 5 12 15 15 12 13 14 12 15 13 14 Fig 51 The cascade connection for 480 CIF/Sec record mode Techwell, Inc. www.techwellinc.com 80 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Infinite Cascade Mode for Display Path In normal cascade connection, the master chip has LINK_NUM = "0" and the lowest slaver chip has LINK_NUM = "3". The master chip can output both display and record path, but the slaver device can output only record path. To implement more than 16 channel application, the TW2835 also provides the infinity cascade connection for display path. That is, the video data and popup information can be transferred to next cascade chip even though the master chip is set with LINK_NUM = "0" and the slaver chip with LINK_NUM = "3" for display path. This mode can be enabled via the T_CASCADE_EN (1x7F) register. The following Fig 52 illustrates the multiple cascade connection for display path. In this example, the display path in the last master chip can output 32 channel video and the record path can implement "480 CIF/sec" with lower 4 chips and "120 CIF/sec" with upper 4 chips. 5 D is p la y ( m u lti- c h S p lit) 6 C a p tu r e (1 6 c h M U X ) C a p tu r e ( Q U A D M U X ) 40 51 C 7 3 AE 8 V id e o In p u t 6 V IN 0 V IN 1 V IN 2 V IN 3 P B IN V L IN K I M a s te r D e v ic e VDOUTX (L IN K _ N U M = 0 ) (S Y N C _ D E L = 6 ) ( L IN K _ L A S T _ X = 0 , L IN K _ E N _ X = 1 ) V D O U T Y ( L IN K _ L A S T _ Y = 0 , H L IN K I L IN K _ E N _ Y = 1 ) D L IN K I 5 6 01234567 89ABCDEF 01234567 89ABCDEF 3 4 B D 9 0 D 6 2 BF V id e o In p u t V IN 0 V IN 1 V IN 2 V IN 3 P B IN V L IN K I VSENC S la v e 1 VDOUTX (L IN K _ N U M = 1 ) (S Y N C _ D E L = 4 ) ( L IN K _ L A S T _ X = 0 , L IN K _ E N _ X = 1 ) V D O U T Y ( L IN K _ L A S T _ Y = 0 , H L IN K I L IN K _ E N _ Y = 1 ) D L IN K I M id d le 4567 89ABCDEF 01234567 89ABCDEF V id e o In p u t V IN 0 V IN 1 V IN 2 V IN 3 P B IN V L IN K I VSENC S la v e 2 VDOUTX (L IN K _ N U M = 2 ) (S Y N C _ D E L = 2 ) ( L IN K _ L A S T _ X = 0 , VDOUTY L IN K _ E N _ X = 1 ) ( L IN K _ L A S T _ Y = 0 , H L IN K I L IN K _ E N _ Y = 1 ) D L IN K I M id d le 89ABCDEF 01234567 89ABCDEF V id e o In p u t VSENC S la v e 3 VDOUTX (L IN K _ N U M = 3 ) (T _ C A S C A D E _ E N = 1 ) (S Y N C _ D E L = 0 ) ( L IN K _ L A S T _ X = 0 , V D O U T Y P B IN L IN K _ E N _ X = 1 ) H L IN K I ( L IN K _ L A S T _ Y = 1 , V L IN K I D L IN K I L IN K _ E N _ Y = 1 ) V IN 0 V IN 1 V IN 2 V IN 3 M id d le CDEF 01234567 89ABCDEF 4 C a p tu r e (4 c h M U X ) C a p tu r e ( Q u a d ) 0 1 3 V id e o In p u t 4 ( L IN K _ N U M = 0 ) (T _ C A S C A D E _ E N = 1 ) (S Y N C _ D E L = 4 ) ( L IN K _ L A S T _ X = 0 , V D O U T Y L IN K _ E N _ X = 1 ) P B IN H L IN K I ( L IN K _ L A S T _ Y = 0 , D L IN K I V L IN K I L IN K _ E N _ Y = 0 ) V IN 0 V IN 1 V IN 2 V IN 3 M id d le M a s te r VSENC VDO UTX 0 4 1 2 3 01234567 89ABCDEF 3 1 2 C a p tu r e (4 c h M U X ) C a p tu r e ( Q u a d ) 4 5 7 V id e o In p u t 3 V IN 0 V IN 1 V IN 2 V IN 3 P B IN V L IN K I M id d le S la v e 1 VSENC VDO UTX ( L IN K _ N U M = 1 ) HSENC (S Y N C _ D E L = 2 ) ( L IN K _ L A S T _ X = 0 , VDO UTY L IN K _ E N _ X = 1 ) ( L IN K _ L A S T _ Y = 0 , H L IN K I L IN K _ E N _ Y = 0 ) D L IN K I 7 3 5 4 7 4567 89ABCDEF 2 6 6 C a p tu r e (4 c h M U X ) C a p tu r e ( Q u a d ) 9 B 8 V id e o In p u t 2 V IN 0 V IN 1 V IN 2 V IN 3 P B IN V L IN K I M id d le S la v e 2 VSENC VDO UTX ( L IN K _ N U M = 2 ) (S Y N C _ D E L = 0 ) ( L IN K _ L A S T _ X = 0 , VDO UTY L IN K _ E N _ X = 1 ) ( L IN K _ L A S T _ Y = 0 , H L IN K I L IN K _ E N _ Y = 0 ) D L IN K I 8 2 9 B A 8 A 89ABCDEF 1 C a p tu r e (4 c h M U X ) C a p tu r e ( Q u a d ) C D F V id e o In p u t 1 V IN 0 V IN 1 V IN 2 V IN 3 P B IN V L IN K I L o w est S la v e 3 VSENC VDO UTX ( L IN K _ N U M = 3 ) (S Y N C _ D E L = 0 ) ( L IN K _ L A S T _ X = 1 , L IN K _ E N _ X = 1 ) V D O U T Y ( L IN K _ L A S T _ Y = 1 , H L IN K I L IN K _ E N _ Y = 0 ) D L IN K I C 1 D E F C E CDEF Fig 52 Infinite cascade mode for display path Techwell, Inc. www.techwellinc.com 81 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary OSD (On Screen Display) Control The TW2835 provides various overlay layers such as 2D box layer, bitmap layer, single box layer and mouse pointer layer that can be overlaid on display and record path independently. The following Fig 53 shows the overlay block diagram. Index + Mix + Blink LUT Write Display RAM LUT From Video Control Part MOTION RESULT VVID_X VVID_Y VOUT_Y Bitmap Overlay Single Box Overlay Pointer Overlay VOSD_Y Display RAM LUT Index + Mix + Blink LUT Write Fig 53 Overlay block diagram The bitmap data can be downloaded from host and supported up to 2 fields * 6 pages for display path and 2 field * 1 page for record path. The TW2835 supports four single and 2D arrayed boxes that are programmable for size, position and color. Dual analog video outputs and dual digital video outputs can enable or disable a bitmap, single box and mouse pointer overlay respectively. The overlay priority of OSD is shown in Fig 54. The various OSD overlay function is very useful to build GUI interface. P ointer Layer S ingle box Layer B itm ap Layer 2D Box Layer V ideo Layer Fig 54 The overlay priority of OSD layer Techwell, Inc. www.techwellinc.com 82 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in To Video Encoder & BT. 656 Formatter Chip-to-Chip Cascade & Path Overlay VOUT_X Bitmap Overlay Single Box Overlay Pointer Overlay VOSD_X 2D Box Overlay TW2835 Video and Audio Controller Preliminary 2 Dimensional Arrayed Box The TW2835 supports four 2D arrayed boxes that have programmable cell size up to 16x16. The 2D arrayed box can be used to make table menu or display motion detection information via the 2DBOX_MODE (2x60, 2x68, 2x70, 2x78) register. The 2D arrayed box is displayed on each path by the 2DBOX_EN (2x60, 2x68, 2x70, and 2x78) register. For each 2D arrayed box, the number of row and column cells is defined via the 2DBOX_HNUM and 2DBOX_VNUM (2x66, 2x6E, 2x76, and 2x7E) registers. The horizontal and vertical location of left top is controlled by the 2DBOX_HL (2x62, 2x6A, 2x72, and 2x7A) register and the 2DBOX_VT (2x64, 2x6C, 2x74, and 2x7C) registers. The horizontal and vertical size of each cell is defined by the 2DBOX_VW (2x65, 2x6D, 2x75, and 2x7D) registers and the 2DBOX_HW (2x63, 2x6B, 2x73, and 2x7B) registers. So the whole size of 2D arrayed box is same as the sum of cells in row and column. The boundary of 2D arrayed box is enabled by the 2DBOX_BNDEN (2x61, 2x69, 2x71, and 2x79) register and its color is controlled via the 2DBOX_BNDCOL (2x5F) register which selects one of 4 colors such as 0% black, 25% gray, 50% gray and 75% white. Especially the TW2835 provides the function to indicate cursor cell inside 2D arrayed box. The cursor cell is enabled by the 2DBOX_CUREN (2x60, 2x68, 2x70, and 2x78) register and the displayed location is defined by the 2DBOX_CURHP and 2DBOX_CURVP (2x67, 2x6F, 2x77, and 2x7F) registers. Its color is a reverse color of cell boundary. It is useful function to control motion mask region. The plane of 2D arrayed box is separated into mask plane and detection plane. The mask plane represents the cell defined by MD_MASK (2x86 ~ 2x9D, 2xA6 ~ 2xBD, 2xC6 ~ 2xDD, 2xE6 ~ 2xFD) register. The detection plane represents the motion detected cell excluding the mask cells among whole cells. The mask plane of 2D arrayed box is enabled by the 2DBOX_MSKEN (2x60, 2x68, 2x70, 2x78) register and the detection plane is enabled by the 2DBOX_DETEN (2x60, 2x68, 2x70, 2x78) register. The color of mask plane is controlled by the MASK_COL (2x5B ~ 2x5E) register and the color of detection plane is defined by the DET_COL (2x5B ~ 2x5E) register which selects one out of 12 fixed colors or 4 user defined colors using the CLUT (2x13 ~ 2x1E) register. The mask plane of 2D arrayed box shows the mask information according to the MD_MASK registers automatically and the additional narrow boundary of each cell is provided to display motion detection via the 2DBOX_DETEN register and its color is a reverse cell boundary color. The plane can be mixed with video data by the 2DBOX_MIX (2x60, 2x68, 2x70, 2x78) register and the alpha blending level is controlled as 25%, 50%, and 75% via the ALPHA_2DBOX (2x1F) register. Even in the horizontal / vertical mirroring mode, the video data and motion detection result can be matched via the 2DBOX_HINV and 2DBOX_VINV (2x81, 2xA1, 2xC1, 2xE1) registers. The TW2835 has 4 2D arrayed boxes so that 4 video channels can have its own 2D arrayed box for motion display mode. To overlay mask information and motion result on video data properly, the scaling ratio of video should be matched with 2D arrayed box size. Techwell, Inc. www.techwellinc.com 83 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary The following Fig 55 shows the 2D arrayed box of table mode and motion display mode. 2DBOX_HL Boundary Mask Plane (MD_MASK = 1) : Color by MASK_COL 2DBOX_VT Detection Plane (MD_MASK = 0) : Color by DET_COL Boundary 2DBOX_HW Cursor Cell 2DBOX_CUR_HP = 5 2DBOX_CUR_VP = 1 Detection Plane Mask Plane 2DBOX_VW 2DBOX_HNUM = 7 2DBOX_VNUM = 4 Motion detected Cell 2DBOX_HNUM = 15 Table mode Motion display mode in 2DBOX_DETEN = 0 Fig 55 The 2D arrayed box in table mode and motion display mode In case those several 2D arrayed boxes have same region, there will be a conflict of what to display for that region. Generally the TW2835 defines that 2D arrayed box 0 has priority over other 2D arrayed box. So if a conflict happens between more than 2 2D arrayed boxes, 2D arrayed box 0 will be displayed first as top layer and 2D arrayed box 1, box 2, and box 3 are hidden beneath that are not supported for pop-up attribute like channel attribute. Techwell, Inc. www.techwellinc.com 84 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in 2DBOX_VNUM = 11 No Motion Cell TW2835 Video and Audio Controller Preliminary Bitmap Overlay The TW2835 has bitmap overlay function for display and record path independently. Each bitmap overlay function block consists of display RAM, lookup table (LUT) and overlay control block. The display RAM stores the downloaded bitmap data from host via the OSD_BUF_DATA (2x00 ~ 2x03) registers by 4 dot unit for display path and 8 dot unit for record path. Actually, the downloaded bit map data consists of index and attributes such as mix and blink. The TW2835 can support max 6 frame bit map pages for display path, and 1 frame for record path. But to extend the bit map page to 1 ~ 5 frame page, the save function is not allowed because those frame pages are overlapped with save function page. The TW2835 has the respective display RAM for display and record path and supports full bitmap overlay with 720 x 576/480 dot resolution for both paths. Each dot has its own attributes such as mix, blink, and LUT index (6 bits for display path and 2 bits for record path). The mix attribute makes character mixed with video data and blink attribute gets character to be blinked with the period defined by the BLK_TIME (2x1F) register. The index attribute selects the displayed color out of 64 colors in display path and 4 colors in record path. If the index is 0xFFh for display path and 0xFh for record path, the dot is disabled and cannot be displayed on the picture. The lookup table (LUT) converts the index into the real displayed color (Y/Cb/Cr). The relationship between the OSD_BUF_DATA and the displayed location is shown in the following Fig 56. OSD_BUF_DATA for display path MIX BLINK INDEX (6 bit) MIX BLINK INDEX (6 bit) MIX BLINK INDEX (6 bit) MIX BLINK INDEX (6 bit) OSD_BUF_DATA[31:24] Dot 0 Dot 0 displayed most left location Dot display Off = 0xFFh OSD_BUF_DATA[23:16] Dot 1 OSD_BUF_DATA[15:8] Dot 2 OSD_BUF_DATA[7:0] Dot 3 Dot 3 displayed most right location OSD_BUF_DATA for record path MIX BLINK INDEX (2 bit) MIX BLINK INDEX (2 bit) MIX BLINK INDEX (2 bit) MIX BLINK INDEX (2 bit) MIX BLINK INDEX (2 bit) MIX BLINK INDEX (2 bit) MIX BLINK INDEX (2 bit) MIX BLINK INDEX (2 bit) OSD_BUF_DATA[31:28] OSD_BUF_DATA[27:24] OSD_BUF_DATA[23:20] OSD_BUF_DATA[19:16] OSD_BUF_DATA[15:12] OSD_BUF_DATA[11:8] OSD_BUF_DATA[7:4] OSD_BUF_DATA[3:0] Dot 0 Dot 1 Dot 2 Dot 3 Dot 4 Dot 5 Dot 6 Dot 7 Dot 0 displayed most left location Dot display Off = 0xFh Dot 7 displayed most right location Fig 56 The relationship between the OSD_BUF_DATA and the displayed location Techwell, Inc. www.techwellinc.com 85 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary The following Fig 57 shows the structure of the display RAM in display and record path. Display RAM for display path OSD_***_HPOS (0 ~ 179) Display RAM for record path OSD_***_HPOS (0 ~ 89) OSD_***_VPOS (0 ~ 287) For Display Path 4 Pixels/(32 Bit) X 180/H X 288 /V X 2/Frame X 6/Page O SD _ FL D OSD_***_VPOS (0 ~ 287) For Record Path 8 Pixels/(32 Bit) X 90/H X 288/V X 2/Frame X 1/Page _P A G E, OS D Bitmap Attribute MIX BLINK INDEX Bitmap Attribute MIX BLINK INDEX 1bit 1bit 6bit 1bit 1bit 2bit * Bitmap Attribute If 8'hFF = Bitmap Off * Bitmap Attribute 4'hF = Bitmap Off Fig 57 The structure of the display RAM The TW2835 support two method for downloading in display RAM such as using internal buffer and using graphic acceleration via the OSD_ACC_EN (2x0A) register. The internal buffer usage is normal method to download a bit map data by 4 ~ 64 dot for display path and 8 ~ 128 dot for record path through the OSD_BUF_DATA, OSD_BUF_ADDR and OSD_BUF_WR (2x04) register. The horizontal starting position for downloading bitmap in display RAM is defined by the OSD_START_HPOS (2x05) register with 4 dot unit for display path and 8 dot unit for record path. The vertical starting position for downloading bitmap is defined by the OSD_START_VPOS (2x07, 2x09) register with 1 line unit. The MSB of the OSD_START_VPOS selects the field of downloading as "0" is for odd field and "1" is for even field. The writing data size of internal buffer is defined by the OSD_BL_SIZE (2x0A) register and the writing path of internal buffer is selected by the OSD_MEM_PATH (2x0A) register ("0" for display path and "1" for record path). The download processing is started by the OSD_MEM_WR (2x0A) register that will be cleared automatically when downloading is finished. The graphic acceleration is useful for single writing, box, line drawing and clearing bitmap data because it will automatically fill in specific display RAM area via the OSD_BUF_DATA. For the graphic acceleration, the OSD_START_HPOS, OSD_START_VPOS, OSD_MEM_PATH and OSD_MEM_WR registers except the OSD_BL_SIZE register are shared with internal buffer. Additionally the horizontal and vertical ending positions are defined by the OSD_END_HPOS (2x06) and OSD_END_VPOS (2x08) register. For proper graphic acceleration, the graphic acceleration region may be separated into multiple regions like 16 x A + B. That is, the "A" region can be divided by 16 unit (1unit is 8 dot for display path, 4 dot for record path) and the Techwell, Inc. www.techwellinc.com Oct, 10, 2006 Datasheet Rev. 1.2 86 www.DataSheet.in OS D _F LD TW2835 Video and Audio Controller Preliminary remained region can be less than 16 unit. So if the region can not be divided by 16 unit, the graphic acceleration should be performed two times independently. The graphic acceleration is started by the OSD_MEM_WR (2x0A) register that will be cleared automatically when graphic acceleration is finished. The Fig 58 shows the flowchart for downloading data to display RAM and lookup table. Bitmap Downloading using internal Buffer D ow nl ad i S tart o ng Bitmap Downloading using Graphic Acceleration D ow nl ad i S tart o ng LUT write LU T W ri S tar te t No B uffer W ri End ? te Y es W ri O S D _S TA R T_H P O S te W ri O S D _S TA R T_VP O S te W ri O S D _B L_S I E te Z W ri O S D _M E M _P A TH te W ri O S D _M E M _P A G E te C l O S D _A C C _E N ear S et O S D _M EM _W R Fo r m ul p l reg i by 16 ti e on W ri O S D _B U F_D A TA te W ri O S D _B U F_A D D R te S et O S D _B U F_W R W ri O S D _B U F_D A TA te W ri O S D _S TA R T_H P O S te W ri O S D _E N D _H P O S te W ri O S D _S TA R T_VP O S te W ri O S D _E N D _VP O S te W ri O S D _M E M _P A TH te W ri O S D _M E M _P A G E te S et O S D _A C C _E N S et O S D _M EM _W R W ri O S D _I D E X _Y te N W ri O S D _I D E X _C B te N W ri O S D _I D E X _C R te N W ri O S D _I D E X _A D D R te N S et O S D _I D E X_W R N No LU T W ri End ? te Y es LU T W ri End te No O S D _M E M _W R = 0 ? Y es Fo r rem ai ned r i n eg o C hang e O S D _S TA R T_H P O S C hang e O S D _E N D _H P O S S et O S D _M EM _W R No O S D _M E M _W R = 0 ? Y es No B i ap W ri E nd ? tm te Y es D ow nl ad i E nd o ng No O S D _M E M _W R = 0 ? No B i ap W ri E nd ? tm te Y es D ow nl ad i E nd o ng Fig 58 The flowchart for downloading data to display RAM The field of bitmap is selected by the OSD_FLD (2x0F) register for display and record path. For OSD_FLD = "1" or "2", only one field data is displayed for both fields, but for OSD_FLD = "3", frame data is displayed so that the bitmap resolution can be enhanced 2 times in vertical direction. For display path, the TW2835 can read the bitmap data from the extended page of display RAM via the OSD_RD_PAGE (2x0F) register. It's useful to change bitmap data from pre-downloaded bitmap page. The blink period is controlled via the TBLINK_OSD (2x1F) register as "0" for 0.25 sec, "1" for 0.5 sec, "2" for 1 sec, and "3" for 2 sec period. The alpha blending level is also controlled via ALPHA_OSD (2x1F) register as 25%, 50%, and 75%. The TW2835 supports dual color LUT (Look-Up Table) with Y/Cb/Cr color space for display and record path via the OSD_INDEX_Y (2x0B), OSD_INDEX_CB (2x0C) and OSD_INDEX_CR (2x0D) register. The OSD_INDEX_ADDR (2x0E) register controls the writing position of LUT as Oct, 10, 2006 Datasheet Rev. 1.2 Techwell, Inc. www.techwellinc.com 87 www.DataSheet.in TW2835 Video and Audio Controller Preliminary "0 ~ 63" is for LUT of display path and "64 ~ 67" for record path. The update processing of color LUT is started by the OSD_INDEX_WR (2x0E) register that will be cleared automatically when downloading is finished. The TW2835 also provides bitmap overlay function between display and record path via the OSD_OVL_MD (2x38) register as "0" for no overlay, "1" for low priority overlay, "2" for high priority overlay, and "3" for only the other path overlay. The following Fig 59 shows the bitmap overlay function between display and record path. D i ay R A M spl O S D _O V L_M D = 0 O S D _O V L_M D = 1 O S D _O V L_M D = 2 O S D _O V L_M D = 3 (D i ay P ath) spl O nl D y O S D _O V L_M D = 0 D +R O S D _O V L_M D = 1 D+R O S D _O V L_M D = 2 O nl R y O S D _O V L_M D = 3 (R ecord P ath) O nl R y R+D R+D O nl D y Fig 59 The bitmap overlay function between display and record path Techwell, Inc. www.techwellinc.com 88 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Single Box The TW2835 provides 4 single boxes that can be used for picture masking or box cursor. Each single box has programmable location and size parameters with the BOX_HL (2x22, 2x28, 2x2D, 2x34), BOX_HW (2x23, 2x29, 2x2E, 2x35), BOX_VT (2x24, 2x2A, 2x2F, 2x36) and BOX_VW (2x25, 2x2B, 2x30, 2x37) registers. The BOX_HL is the horizontal location of box with 2 pixel unit and the BOX_HW is the horizontal size of box with 2 pixel unit. The BOX_VT is the vertical location of box with 1 line unit and the BOX_VW is the vertical size of box with 1 line unit. The BOX_PLNEN (2x20, 2x26, 2x2B, 2x32) register enables each plane color and its color is defined by the BOX_PLNCOL (2x21, 2x27, 2x2C, 2x33) register, which selects one out of 12 fixed colors or 4 user defined colors using the CLUT (2x13 ~ 2x1E) register. Each box plane can be mixed with video data via the BOX_PLNMIX (2x20, 2x26, 2x2B, 2x32) register and the alpha blending level is controlled via the ALPHA_BOX (2x1F) register. The color of box boundary is enabled via the BOX_BNDEN (2x20, 2x26, 2x2B, 2x32) register and its color is defined by the BOX_BNDCOL (2x20, 2x26, 2x2B, 2x32) registers. In case that several boxes have same region, there will be a conflict of what to display for that region. Generally the TW2835 defines that box 0 has priority over box 3. So if a conflict happens between more than 2 boxes, box 0 will be displayed first as top layer and box 1 to box 3 are hidden beneath that are not supported for pop-up attribute unlike channel display. Mouse Pointer The TW2835 supports the mouse pointer that has attributes such as pointer enabling, pointer location, blink and sub-layer enabling. The mouse pointer can be overlaid on both display and record path independently. The mouse pointer is located in the full screen according to the CUR_HP (2x11) register with 2 pixel step and CUR_VP (2x12) register with 1 line step. Two kinds of mouse pointer are provided through the CUR_TYPE (2x10) register. The CUR_SUB (2x10) register determines a pointer inside area to be filled with 100% white or to be transparent and the CUR_BLINK (2x10) register controls a blink function of mouse. Actually the CUR_ON (2x10) register enables or disables the mouse pointer for display and record path independently. Techwell, Inc. www.techwellinc.com 89 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Video Output Preliminary The TW2835 supports dual digital video outputs with ITU-R BT.656 format and 2 analog video outputs with built-in video encoder at the same time. Dual video controllers generate 4 kinds of video data such as the display path video data with/without OSD and the record path video data with/without the OSD. The CCIR_IN (1xA0) register selects one of 4 video data for the digital video output and ENC_IN (1xA0) register selects one of 4 video data for the analog video output as shown in Fig 60. SYS5060/ENC_MODE ENC_VSDEL/ENC_VSOFF/ENC_HSDEL/ACTIVE_HDEL/ACTIVE_VDEL Timing Interface and Control CCIR_OUT_X HSENC VSENC FLDENC VVID_X VOSD_X VVID_Y VOSD_Y CCIR_IN_X 4X1 MUX CCIR_IN_Y 656 Encoder (X Path) 656 Encoder (Y Path) DAC_OUT_YX 2X1 MUX CCIR_OUT_Y VDOX 4X1 MUX 2X1 MUX VDOY DAC_PD_YX ENC_IN_X Y 0 Luma 4X1 MUX DAC_OUT_CX DAC DAC_PD_CX VAOYX 4X1 MUX Y/C Separation Cb/Cr + X CVBS Chroma 4X1 MUX DAC_OUT_YY DAC VAOCX FSC Generation ENC_IN_Y Cb/Cr DAC_PD_YY 4X1 MUX Y/C Separation X + CVBS 2X1 MUX DAC VAOYY Y Fig 60 Video output selection The TW2835 supports all NTSC and PAL standards for analog output, which can be composite video, or S-video video for both display and record path. All outputs can be operated as master mode to generate timing signal internally or slave mode to be synchronized with external timing. Techwell, Inc. www.techwellinc.com 90 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Timing Interface and Control The TW2835 can be operated in master or slave mode via the ENC_MODE (1xA4) register. In master mode, the TW2835 can generate all of timing signals internally while the TW2835 receives all of timing signals from external device in slaver mode. The polarity of horizontal, vertical sync and field flag can be controlled by the ENC_HSPOL, ENC_VSPOL and ENC_FLDPOL (1xA4) registers respectively for both master and slave mode. In slave mode, the TW2835 can detect field polarity from vertical sync and horizontal sync via the ENC_FLD (1xA4) register or can detect vertical sync from the field flag via the ENC_VS (1xA4) register. The detailed timing diagram is illustrated in the following Fig 61. ACTIVE_VDEL Even End VBI Full Interval 525 1 2 3 4 5 6 7 8 9 10 11 12-17 18 Odd Start Line Number Analog Output V (656) F (656) H (656) VSENC FLDENC HSENC 524 19 20 ENC_VSDEL + ENC_VSOFF (Odd) ACTIVE_HDEL Analog Output H (656) ENC_HSDEL HSENC ACTIVE_VDEL Odd End VBI Full Interval Line Number Analog Output V (656) F (656) H (656) ENC_VSDEL + ENC_VSOFF (Even) VSENC FLDENC HSENC 274281 282 Even Start Active Data / Line Line Start 262 263 264 265 266 267 268 269 270 271 272 273 283 284 285 286 Fig 61 Horizontal and vertical timing control Techwell, Inc. www.techwellinc.com 91 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary The TW2835 provides or receives the timing signal through the HSENC, VSENC and FLDENC pins. To adjust the timing of those pins from video output, the TW2835 has the ENC_HSDEL (1xA6), ENC_VSDEL and ENC_VSOFF (1xA5) registers which control only the related signal timing regardless of analog and digital video output. Likewise, by controlling the ACTIVE_VDEL (1xA7) and ACTIVE_HDEL (1xA8) registers, only active video period can be shifted on horizontal and vertical direction independently. The shift of active video period produces the cropped video image because the timing signal is not changed even though active period is moved. So this feature is restricted to adjust video location in monitor for example. To control the analog video timing differently from digital video output, the ACTIVE_MD (1xA8) register can be used. For ACTIVE_MD = "1", both analog and digital output timing can be controlled together, but for ACTIVE_MD = "0", the active delay of only analog video output can be controlled independently. In cascade application, these timing related register should be controlled with same value for all cascade chips and be operated as only master mode because HSENC and VSENC pin is dedicated to cascade purpose. (Please refer to "Chip-to-Chip Cascade Operation" section on page 76) Techwell, Inc. www.techwellinc.com 92 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Analog Video Output The TW2835 supports analog video output using built-in video encoder, which generates composite or S-video with three 10 bit DAC for display and record path. The incoming digital video are adjusted for gain and offset according to NTSC or PAL standard. Both the luminance and chrominance are band-limited and interpolated to 27MHz sampling rate for digital to analog conversion. The NTSC output can be selected to include a 7.5 IRE pedestal. The TW2835 also provides internal test color bar generation. Output Standard Selection The TW2835 supports various video standard outputs via the SYS5060 (1x00) and ENC_FSC, ENC_PHALT, ENC_PED (1xA9) registers as described in the following Table 7. Table 7 Analog output video standards Format NTSC-M NTSC-J NTSC-4.43 NTSC-N PAL-BDGHI PAL-N PAL-M PAL-NC PAL-60 525/59.94 625/50 525/59.94 15.734 15.625 15.734 3.57561149 3.58205625 4.43361875 0 1 0 2 3 1 1 1 1 525/59.94 625/50 625/50 15.734 15.625 15.625 4.43361875 3.579545 4.43361875 0 1 1 1 0 1 0 0 1 Specification Line/Fv (Hz) 525/59.94 Fh (KHz) 15.734 Fsc (MHz) 3.579545 SYS5060 0 Register ENC_ FSC 0 ENC_PHALT 0 ENC_PED 1 0 1 0 0 1 0 0 0 If the ENC_ALTRST (1xA9) register is set to "1", phase alternation can be reset every 8 field so that phase alternation keeps same phase every 8 field. Techwell, Inc. www.techwellinc.com 93 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Luminance Filter The bandwidth of luminance signal can be selected via the YBW (1xAA) register as shown in the following Fig 62. 0 -5 -10 Magnitude Response (dB) -15 -20 -25 -30 -35 -40 -45 0 2 4 6 8 Frequency (Hertz) 10 12 x 10 6 Fig 62 Characteristics of luminance filter Chrominance Filter The bandwidth of chrominance signal can be selected via the CBW (1xAA) register as shown in the following Fig 63. 0 -5 Magnitude Response (dB) -10 -15 -20 -25 0 0.5 1 1.5 Frequency (Hertz) 2 2.5 x 10 3 6 Fig 63 Characteristics of chrominance Filter Techwell, Inc. www.techwellinc.com 94 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Digital-to-Analog Converter The digital video data from video encoder is converted to analog video signal by DAC (Digital to Analog Converter). The analog video signal format can be selected for each DAC independently via the DAC_OUT_SEL (1xA1, 1xA2) register like the following Table 8. Each DAC can be disabled independently to save power by the DAC_PD (1xA1, 1xA2) register. The video output gain can also be controlled via the VOGAIN (0x41, 0x42) register. Table 8 The available output combination of DAC Path Format VAOYX Ouptput VAOCX VAOYY No Output O O O CVBS O O O Display Luma O O X Chroma O O X Record CVBS X X O A simple reconstruction filter is required externally to reject noise as shown in the Fig 64. C 18pF L 1.8uH R 75 C 330pF C 330pF VAO RCA JACK Fig 64 Example of reconstruction filter Techwell, Inc. www.techwellinc.com 95 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Digital Video Output The digital output data of ITU-R BT.656 format is synchronized with CLKVDOX/Y pin which is 27MHz for single output or 54MHz for dual output. Each digital data of display and record path can be output through VDOX and VDOY pin respectively on single output mode. For the dual output mode, both display and record path output can come out through only one VDOX or VDOY pin. The active video level of the ITU-R BT.656 can be limited to 1 ~ 254 via the CCIR_LMT (1xA4) register. In case that channel ID is located in active video period, the CCIR_LMT should be set to low for proper digital channel ID operation. The following Table 9 shows the ITU-R BT.656 SAV and EAV code sequence. Table 9 ITU-R BT.656 SAV and EAV code sequence Line From 523 (1*1) 4 60Hz (525Lines) To 3 Field EVEN Condition Vertical Blank Horizontal EAV SAV EAV SAV EAV SAV EAV SAV EAV SAV EAV SAV EAV SAV EAV SAV EAV SAV EAV SAV EAV SAV EAV SAV F 1 FVH V 1 H 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0xFF 0x00 0x00 0xFF 0x00 0x00 First SAV/EAV Code Sequence Second Third Fourth 0xF1 0xEC 0xB6 0xAB 0x9D 0x80 0xB6 0xAB 0xF1 0xEC 0xDA 0xC7 0xB6 0xAB 0x9D 0x80 0xB6 0xAB 0xF1 0xEC 0xDA 0xC7 0xF1 0xEC 19 259 *1 (263 ) 265 ODD Blank 0 1 20 260 *1 (264 ) 266 ODD Active 0 0 ODD Blank 0 1 282 522 (525*1) 22 EVEN Blank 1 1 283 EVEN Active 1 0 1 ODD Blank 0 1 23 50Hz (625Lines) 310 ODD Active 0 0 311 312 ODD Blank 0 1 313 335 EVEN Blank 1 1 336 623 EVEN Active 1 0 624 625 EVEN Blank 1 1 Note 1. The number of ( ) is ITU-R BT. 656 standard. The TW2835 also supports this standard by CCIR_STD register (1xA8 Bit[6]). The TW2835 also supports ITU-R BT.601 interface through the VDOX and VDOY pin. Techwell, Inc. www.techwellinc.com 96 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Single Output Mode For the single output mode, each digital output data in display and record path can be output at 27MHz ITU-R BT 656 interface through VDOX and VDOY pin that are synchronized with CLKVDOX and CLKVDOY. The output data is selected by the CCIR_OUT (1xA3) register which selects the display path data for "0" and record path data for "1". The timing diagram of single output mode for ITU-R BT.656 interface is shown in the following Fig 65. CLKVDOX/Y VDOX/Y[7:0] FFh 00h 00h EAV code XY 80h 10h 80h 10h FFh 00h 00h SAV code XY Cb0 Y0 Cr0 Y1 Cb2 Y2 Cr2 Y3 Fig 65 Timing diagram of single output mode for 656 Interface The TW2835 also supports 13.5MHz ITU-R BT 601 interface through VDOX and VDOY pin via the CCIR_601 (1xA3) register. The output data is selected via the CCIR_OUT register which chooses the display path data for "0" and record path data for "1". The timing diagram of single output mode for ITU-R BT 601 interface is shown in the following Fig 66. CLKVDOX/Y (13.5MHz) VDOX[7:0] VDOY[7:0] FFh 00h 00h XYh EAV code 80h 10h 80h 10h FFh 00h 00h XYh SAV code Cb0 Y0 Cr0 Y1 Cb2 Y2 Cr2 Y3 Fig 66 Timing diagram of single output mode for 601 Interface The video output is synchronized with CLKVDOX and CLKVDOY pins whose phase and frequency can be controlled by the ENC_CLK_FR_X, ENC_CLK_FR_Y, ENC_CLK_PH_X and ENC_CLK_PH_Y (1xAD) registers. Techwell, Inc. www.techwellinc.com 97 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Dual Output Mode The TW2835 also supports dual output mode that is time-multiplexed with display and record path data at 54MHz clock rate. The sequence is related with the CCIR_OUT (1xA3) register that the display path data precedes the record path for CCIR_OUT = "2" and the record path data precedes the display path for CCIR_OUT = "3". This mode is useful to reduce number of pins for interface with other devices. The timing diagram of dual output mode for ITU-R BT 656 interface is illustrated in the Fig 67. CLKVDOX (54MHz) CLKVDOY (27MHz) VDOX/Y[7:0] FFhFFh 00h 00h 00h 00h XY XY 80h 80h 10h 10h FFh FFh 00h 00h 00h 00h XY XY Cb0Cb0 Y0 Y0 Cr0 Cr0 Y1 Y1 Cb2Cb2 Y2 Y2 EAV code Data output for display path SAV code Data output for capture path Fig 67 Timing diagram of dual output mode for 656 Interface The TW2835 also supports dual output mode with 13.5MHz ITU-R BT 601 interface that is timing multiplexed to 27MHz through VDOX and VDOY pin via the CCIR_601 (1xA3) register. The sequence is determined by the CCIR_OUT register like 54MHz ITU-R BT.656 interface. The timing diagram of single output mode for ITU-R BT 601 interface is shown in the following Fig 68. CLKVDOX (27MHz) CLKVDOY (13.5MHz) VDOUTX[7:0] VDOUTY[7:0] FFh FFh 00h 00h 80h 80h 00h 00h XYh XYh 10h 10h EAV code Data output for display path 80h 80h FFh FFh 00h 00h Cb0 Cb0 Cr0 Cr0 Cb2 Cb2 Cr2 Cr2 10h 10h 00h 00h XYh XYh Y0 SAV code Data output for capture path Y0 Y1 Y1 Y2 Y2 Y3 Y3 Fig 68 Timing diagram of dual output mode for 601 Interface The video output is synchronized with CLKVDOX and CLKVDOY pins whose polarity and frequency can be controlled by the ENC_CLK_FR_X, ENC_CLK_FR_Y, ENC_CLK_PH_X and ENC_CLK_PH_Y registers. Techwell, Inc. www.techwellinc.com 98 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Audio CODEC Preliminary The audio codec in the TW2835 is composed of 4 audio Analog-to-Digital converters, 1 Digitalto-Analog converter, audio mixer, digital serial audio interface and audio detector shown as the Fig 69. The TW2835 can accept 4 analog audio signals and 1 digital serial audio data and produce 1 mixing analog audio signal and 2 digital serial audio data. Audio Detector I2S Encoder ACLKR ASYNR ADATR ADATM AIN0 AIN1 AIN2 AIN3 ACLKP ASYNP ADATP G ADC MUTE G ADC MUTE G ADC MUTE MIX DAC G AOUT G ADC MUTE I2S Decoder MUTE RATIO MUTE Fig 69 Block Diagram of Audio Codec The level of analog audio input signal AIN0 ~ AIN3 can be adjusted respectively by internal programmable gain amplifiers that are defined via the AIGAIN0, AIGAIN1, AIGAIN1 and AIGAIN3 (0x60, 0x61) registers and then sampled by each Analog-to-Digital converters. The digital serial audio input data through the ACLKP, ASYNP and ADATP pin are used for playback function. To record audio data, the TW2835 provides the digital serial audio output via the ACLKR, ASYNR and ADATR pin. The TW2835 can mix all of audio inputs including analog audio signal and digital audio data according to the predefined mixing ratio for each audio via the MIX_RATIO1 ~ MIX_RATIO4 and MIX_RATIOP (0x6E, 0x6F, and 0x70) registers. This mixing audio output can be provided through the analog and digital interfaces. The embedded audio Digital-to-Analog converter supports the analog mixing audio output whose level can be controlled by programmable gain amplifier via the AOGAIN (0x70) register. The ADATM pin supports the digital mixing audio Techwell, Inc. www.techwellinc.com 99 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary output and its digital serial audio timings are provided through the ACLKR and ASYNR pins that are shared with the digital serial audio record timing pins. Multi-Chip Operation The TW2835 can be operated with the cascaded connection up to 16 chips that accept 64 channel audio inputs. The Fig 70 shows the example of 16 channel audio connection using 4 chips. Each stage chip can accept 4 analog audio signals so that four cascaded chips through the ADATP and ADATM pin will be 16 channels audio controller. The first stage chip provides 16ch digital serial audio data for record. Even though the first stage chip has only 1 digital serial audio data pin ADATR for record, the TW2835 can generate 16 channel data simultaneously using multi-channel method. Also, each stage chip can support 4 channel record outputs that are corresponding with analog audio inputs. This first stage chip can also output 16 channel mixing audio data by the digital serial audio data and analog audio signal. Each chip accepts the digital serial audio data for playback and converts it to analog signal through the Digital-to-Analog Converter. Techwell, Inc. www.techwellinc.com 100 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary AIN1 AIN2 AIN3 AIN4 Analog Mix & Playback Output AOUT ALINKO TW2835 First Stage ALINKI ACLKR ASYNR ADATR ADATM ACLKP ASYNP ADATP Record Output (AIN1~AIN16) Mix Output Playback Input AIN5 AIN6 AIN7 AIN8 Analog Mix & Playback Output AOUT ALINKO TW2835 Second Stage ALINKI ACLKR ASYNR ADATR ADATM ACLKP ASYNP ADATP Record Output (AIN5~AIN16) Playback Input AIN9 AIN10 AIN11 AIN12 Analog Mix & Playback Output AOUT ALINKO TW2835 Third Stage ALINKI ACLKR ASYNR ADATR ADATM ACLKP ASYNP ADATP Record Output (AIN9~AIN16) Playback Input AIN13 AIN14 AIN15 AIN16 Analog Mix & Playback Output AOUT ALINKO TW2835 Last Stage ALINKI ACLKR ASYNR ADATR ADATM ACLKP ASYNP ADATP Record Output (AIN13~AIN16) Playback Input Fig 70 Connection for Multi-chip Operation Techwell, Inc. www.techwellinc.com 101 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Serial Audio Interface There are 3 kinds of digital serial audio interfaces in the TW2835, the first is a recording output, the second is a mixing output and the third is a playback input. These 3 digital serial audio interfaces follow a standard I2S or DSP interface as shown in the Fig 71. 1/fs ASYN ACLK ADAT MSB Data 1 LSB MSB Data 2 LSB MSB (a) I2S Format 1/fs ASYN ACLK ADAT MSB Data 1 LSB MSB Data 2 LSB MSB (b) DSP Format Fig 71 Timing Chart of Serial Audio Interface Playback Input The serial interface using the ACLKP, ASYNP and ADATP pins accepts the digital serial audio data for the playback purpose. The ACLKP and ASYNP pins can be operated as master or slaver mode. For master mode, these pins work as output pin and generate the standard audio clock and synchronizing signal. For slaver mode, these pins are input mode and accept the standard audio clock and synchronizing signal. The ADATP pin is always input mode regardless of operating mode. One of audio data in left or right channel should be selected for playback audio by the PB_LRSEL (0x6C). The sampling frequency, bit width and number of audio bit are defined by the PB_SAMRATE, PB_BITWID and PB_BITRATE (0x6C) register. Techwell, Inc. www.techwellinc.com 102 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Record Output Preliminary To record audio data, the TW2835 provides the digital serial audio data through the ACLKR, ASYNR and ADATR pins. The RM_SAMRATE, RM_BITWID and RM_BITRATE(0x62) registers define the sampling frequency, bit width and number of audio bit. Even though the standard I2S and DSP format can have only 2 audio data on left and right channel, the TW2835 can provide an extended I2S and DSP format which can have 16 channel audio data through ADATR pin. The R_MULTCH (0x63) defines the number of audio data to be recorded by the ADATR pin. The Fig 72 shows the digital serial audio data organization for multi-channel audio. 1/fs ASYNR ACLKR 3 R_MULTCH ADATR 2 1 0 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 8 9 A B 0 1 8 9 0 8 MSB 8/16bit LSB (a) I2S Format 1/fs ASYNR ACLKR 3 R_MULTCH ADATR 2 1 0 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 0 1 2 3 0 1 MSB 8/16bit LSB (b) DSP Format Fig 72 Timing Chart of Multi-channel Audio Record Techwell, Inc. www.techwellinc.com 103 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary The following Table 10 shows the sequence of audio data to be recorded for each mode of the R_MULTCH (0x63) register. The sequences of 0 ~ F do not mean actual audio channel number but represent sequence only. The actual audio channel should be assigned to sequence 0 ~ F by the R_SEQ_0 ~ R_SEQ_F (0x64 ~ 0x6B) register. When the ADATM pin is used for record via the R_ADATM (0x63) register, the audio sequence of ADATM is showed also in Table 10. Table 10 Sequence of Multi-channel Audio Record I2S Format R_MULTCH 0 1 2 3 DSP Format R_MULTCH 0 1 2 3 Pin ADATR ADATM ADATR ADATM ADATR ADATM ADATR ADATM Pin ADATR ADATM ADATR ADATM ADATR ADATM ADATR ADATM 0 F 0 F 0 F 0 F 1 E 1 E 1 E 1 E 2 D 2 D 2 D 3 C 3 C 3 C 4 B 4 B 5 A 5 A 6 9 6 9 7 8 7 8 8 7 9 6 A 5 B 4 C 3 D 2 E 1 F 0 0 F 0 F 0 F 0 F 1 E 1 E 1 E 2 D 2 D 3 C 3 C 4 B 5 A 6 9 7 8 Left Channel 8 7 8 7 8 7 8 7 9 6 9 6 9 6 A 5 A 5 B 4 B 4 C 3 D 2 E 1 F 0 Right Channel Left/Right Channel Mix Output The digital serial audio data on the ADATM pin has 2 different audio data which are mixing audio and playback audio. The mixing digital serial audio data is the same as analog mixing output. The sampling frequency, bit width and number of audio for the ADATM pin are same as the ADATR pin because the ACLKR and ASYNR pins are shared with the ADATR and ADATM pins. Techwell, Inc. www.techwellinc.com 104 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Analog Audio Output The embedded audio Digital-to-Analog converter supports the analog mixing audio output whose level can be controlled via the AOGAIN (0x70) register. The audio DAC output can be disabled to save power by the ADAC_PD (0x4C) register. A simple reconstruction filter is required externally to reject noise as shown in the Fig 64. AOUT 4.7K RCA JACK R C 33nF Fig 73 Example of audio DAC reconstruction filter Techwell, Inc. www.techwellinc.com 105 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Host Interface Preliminary The TW2835 provides serial and parallel interfaces that can be selected by HSPB pin. When HSPB is low, the parallel interface is selected, the serial interface for high. Some of the interface pins serve a dual purpose depending on the working mode. The pins HALE and HDAT [7] in parallel mode become SCLK and SDAT pins in serial mode and the pins HDAT [6:1] and HCSB0 in parallel mode become slave address in serial mode respectively. Each interface protocol is shown in the following figures. . Table 11 Pin assignments for serial and parallel interface Pin Name HSPB HALE HRDB HWRB HCSB0 HCSB1 HDAT[0] HDAT[1] HDAT[2] HDAT[3] HDAT[4] HDAT[5] HDAT[6] HDAT[7] Serial Mode HIGH SCLK Not Used (VSSO) Not Used (VSSO) Slave Address[0] Not Used (VSSO) Not Used (VSSO) Slave Address[1] Slave Address[2] Slave Address[3] Slave Address[4] Slave Address[5] Slave Address[6] SDAT Parallel Mode LOW AEN RENB WENB CSB0 CSB1 PDATA[0] PDATA[1] PDATA[2] PDATA[3] PDATA[4] PDATA[5] PDATA[6] PDATA[7] Techwell, Inc. www.techwellinc.com 106 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Serial Interface Preliminary HDAT [6:1] and HCSB0 pins define slave address in serial mode. Therefore, any slave address can be assigned for full flexibility. The Fig 74 shows an illustration of serial interface for the case of slave address (Read : "0x85", Write : 0x84"). 3.3V/5V 3.3V/5V 3.3V/5V R200 10K U1 HSPB HALE HDAT[7] HDAT[6] HDAT[5] HDAT[4] HDAT[3] HDAT[2] HDAT[1] HCSB0 HDAT[0] HCSB1 HRDB HWRB 55 59 62 63 65 66 67 68 69 56 71 57 60 61 R1 10K R201 4.7K R202 4.7K SCLK SDAT TW2835 Slave Address example Read : "10000101" Write : "10000100" Fig 74 The serial interface for the case of slave address. (Read : "0x85", Write : "0x84") The TW2835 has total 3 pages for registers (1 page can contain 256 registers) so that the page index [1:0] is used for selecting page of registers. Page 0 is assigned for video decoder, Page 1 is for video controller / encoder and Page 2 is for OSD / motion detector / Box / Mouse pointer. The detailed timing diagram is illustrated in the Fig 75 and Fig 76. The TW2835 also supports automatic index increment so that it can read or write continuous multi-bytes without restart. Therefore, the host can read or write multiple bytes in sequential order without writing additional slave address, page index and index address. The data transfer rate on the bus is up to 400K bits/s. Techwell, Inc. www.techwellinc.com 107 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Preliminary Start Slave address R/WB Ack "0" Page index Ack Index address Ack Data Ack Stop SDAT SCLK MSB LSB MSB LSB MSB LSB MSB LSB Fig 75 Write timing of serial interface Restart without stop is allowed Start Slave address R/WB Ack "0" Page Index Ack Index address Ack Stop Start Slave address R/WB Ack "1" MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB Data Ack Data NoAck Stop SDAT SCLK MSB LSB Index Write Procedure for Read Data Read Procedure Fig 76 Read timing of serial interface Techwell, Inc. www.techwellinc.com 108 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Parallel Interface Preliminary In parallel interface, page of registers can be selected by CSB0 and CSB1 pins, which are working as page index [1:0] in serial interface. Page number 0 is selected by CSB1 = "0" and CSB0 = "0", page number 1 is by CSB1 = "0" and CSB0 = "1", and page number 2 is by CSB1 = "1" and CSB0 = "0". The TW2835 also supports automatic index increment for parallel interface. The writing and reading timing is shown in the Fig 77 and Fig 78 respectively. The detail timing parameters are in Table 12. CSB0/1 Tsu(1) Tw Tw Th(1) Tcs WENB RENB AEN Tw PDATA Index Address Tsu(2) Th(2) Tsu(2) Write Th(2) Tsu(2) Write Th(2) Fig 77 Write timing of parallel interface with auto index increment mode CSB0/1 Tsu(1) Tcs WENB Tw RENB AEN Tw Trd Trd Tw Th(1) PDATA Index Address Tsu(2) Th(2) Td(1) Read Td(2) Td(1) Read Td(2) Fig 78 Read timing of parallel interface with auto index increment mode Techwell, Inc. www.techwellinc.com 109 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Table 12 Timing parameters of parallel interface Parameter CSB setup until AEN active PDATA setup until AEN,WENB active AEN, WENB, RENB active pulse width CSB hold after WENB, RENB inactive PDATA hold after AEN,WENB inactive PDATA delay after RENB active PDATA delay after RENB inactive CSB inactive pulse width RENB active delay after AEN inactive RENB active delay after RENB inactive Symbol Tsu(1) Tsu(2) Tw Th(1) Th(2) Td(1) Td(2) Tcs Trd 60 60 60 Min 10 10 40 60 20 12 Typ Preliminary Max Units ns ns ns ns ns ns ns ns ns Techwell, Inc. www.techwellinc.com 110 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Interrupt Interface Preliminary The TW2835 provides the interrupt request function via an IRQ pin. Any video loss, motion, blind, and night detection will make IRQ pin high or low whose polarity can be controlled via the IRQ_POL (1x76) register. The host can distinguish what event makes interrupt request to IRQ pin by reading the status of IRQENA_NOVID (1x78), IRQENA_MD (1x79), IRQENA_BD (1x7A) and IRQENA_ND (1x7B) registers that have different function for reading and writing. For writing mode, setting "1" to those registers enables to detect the related event. For reading mode, the state of those registers has two kinds of information depending on the IRQENA_RD (1x76) register. For IRQENA_RD = "1", the state of those registers indicates the written value on the writing mode. For IRQENA_RD = "0", the state of those registers denotes the related event status. The interrupt request will be cleared automatically by reading those registers when the IRQENA_RD is "0". The following Fig 79 is show an illustration of the interrupt sequence. VIN 3 motion disappear VIN 3 blind detect VIN 3 motion detect VIN 0 video detect 01h 00h 04h 00h Event Also Cleared by read IRQ Pin output Register address VIN 0 video loss detect 00h IRQENA_NOVID (1x78) IRQENA_MD (1x79) IRQENA_BD (1x7A) 00h 00h 08h 1x78h 1x79h 1x78h 1x7Ah Clear by host read (HRDB) Read Data 01h 04h 00h 08h Fig 79 the illustration of Interrupt Sequence The TW2835 also provides the status of video loss, motion, blind and night detection for individual channel through the MPP0/1 pins with the control of the MPPSET (1xB0, 1xB1, 1xB3, 1xB5) register. Techwell, Inc. www.techwellinc.com 111 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller MPP Pin Interface Preliminary The TW2835 provides the multi-purpose pin through the DLINKI and MPP1/2 pin that is controlled via the MPP_MD, MPP_SET, MPP_DATA (1xB0 ~ 1xB5) register. But, DLINK pin is also used for cascaded interconnection in cascaded application. The following Table 13 shows the detailed mode with the control of the related register. MPP_MD MPP_SET 0 1 2 3 4 5-7 8 9 - 13 14 15 0 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Table 13 MPP Pin Interface Mode I/O MPP_DATA In Input Data from Pin Strobe_det_c CHID_MUX[3:0] CHID_MUX[7:4] Mux_out_det[15:12] Strobe_det_d {1'b0, H, V, F} {hsync, vsync, field, link} Write Data to Pin Input Data from Pin Decoder H Sync Decoder V Sync Decoder Field Sync Decoder Ch 0/1 [7:4] Decoder Ch 0/1 [3:0] Decoder Ch 2/3 [7:4] Decoder Ch 2/3 [3:0] Novid_det_m Md_det_m Bd_det_m Nd_det_m Novid_det_s Md_det_s Bd_det_s Nd_det_s Default Capture path Reserved Display Path Reserved BT. 656 Sync Analog Encoder Sync GPP I/O Mode Bit[3:0] : VIN3 ~ VIN0 MSB for Ch 0/1 LSB for Ch 0/1 MSB for Ch 2/3 LSB for Ch 2/3 Reserved For VINA (ANA_SW = 0) Remark 0 Out 1 Out In 2 Out For VINB (ANA_SW = 1) The TW2835 also supports four channel real-time record output using MPP1 and MPP2 pin. The video output is synchronized with CLKMPP1 and CLKMPP2 pins whose polarity and frequency can be controlled via the DEC_CLK_FR_X, DEC_CLK_FR_Y, DEC_CLK_PH_X and DEC_CLK_PH_Y registers. Techwell, Inc. www.techwellinc.com 112 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in www.DataSheet.in TW2835 Video and Audio Controller Control Register Register Map For Video Decoder VIN0 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E Preliminary Address VIN1 VIN2 0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17 0x18 0x19 0x1A 0x1B 0x1C 0x1D 0x1E 0x20 0x21 0x22 0x23 0x24 0x25 0x26 0x27 0x28 0x29 0x2A 0x2B 0x2C 0x2D 0x2E 0x40 0x41 0x42 0x43 0x44 0x45 0x46 0x47 0x48 0x49 0x4A 0x4B 0x4C 0x4D 0x4E 0x4F 0x50 0x51 0x52 0x53 0x54 0x55 0x60 VIN3 0x30 0x31 0x32 0x33 0x34 0x35 0x36 0x37 0x38 0x39 0x3A 0x3B 0x3C 0x3D 0x3E BIT7 IFMTMAN BIT6 DET_FORMAT * BIT5 BIT4 DET_COLOR * BIT3 BIT2 BIT1 BIT0 0 0 YBWI 0 0 0 PB_SDEL MPPCLK_OEB 0 0 SLICELVL FLDMODE IFCOMP 0 0 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 LOCK_COLOR * LOCK_GAIN * LOCK_OFST * LOCK_HPLL * IFORMAT AGC PEDEST DET_NONSTD * DET_FLD60 * HDELAY_XY [7:0] HACTIVE_XY [7:0] VDELAY_XY [7:0] VACTIVE_XY [7:0] VACTIVE_XY[8] VDELAY_XY[8] HACTIVE_XY [9:8] HDELAY_XY [9:8] HUE SAT CONT BRT COMBMD YPEAK_MD YPEAK_GN CKILL CTI_GN 0 0 ANA_SW SW_RESET WPEAK_MD 0 1 0 0 0 1 WPEAK_REF WPEAK_RNG WPEAK_TIME VOGAINCX 0 VOGAINYX 0 0 0 VOGAINYY 0 0 GNTIME OSTIME HSWIDTH VSMODE FLDPOL HSPOL VSPOL 1 0 CLPF ACCTIME APCTIME C_CORE 0 CDEL U_GAIN V_GAIN U_OFF V_OFF ADAC_PD AADC_PD VADC_PD3 VADC_PD2 VADC_PD1 VADC_PD0 0 0 NOVID_MD 1 1 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 FLD VAV AIGAIN1 AIGAIN0 Techwell, Inc. www.techwellinc.com 113 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller For Video Decoder VIN0 Address VIN1 VIN2 0x61 0x62 0x63 0x64 0x65 0x66 0x67 0x68 0x69 0x6A 0x6B 0x6C 0x6D 0x6E 0x6F 0x70 0x71 0x72 0x73 0x74 0x90 0xA0 0x91 0xA1 0x92 0xA2 0x93 0xA3 0x94 0xA4 0x95 0xA5 0x96 0xA6 0x97 0xA7 0x98 0xA8 0x99 0xA9 0x9A 0xAA 0x9B 0xAB 0x9C 0xAC 0x9D 0xAD 0x9E 0xAE 0x9F 0xAF 0xC0 0xC1 0xC2 0xC3 0xC4 0xC5 0xC6 0xC7 Preliminary VIN3 BIT7 M_PBSEL BIT6 BIT5 BIT4 RM_BITRATE 0 BIT3 RM_DATMOD 0 BIT2 BIT1 BIT0 0 0 0 0 0 0 0 0xB0 0xB1 0xB2 0xB3 0xB4 0xB5 0xB6 0xB7 0xB8 0xB9 0xBA 0xBB 0xBC 0xBD 0xBE 0xBF 0x80 0x81 0x82 0x83 0x84 0x85 0x86 0x87 0x88 0x89 0x8A 0x8B 0x8C 0x8D 0x8E 0x8F AIGAIN3 M_RLSWAP 0 0 R_SEQ_1 R_SEQ_3 R_SEQ_5 R_SEQ_7 R_SEQ_9 R_SEQ_B R_SEQ_D R_SEQ_F PB_MASTER PB_LRSEL 0 MIX_DERATIO MIX_RATIO1 MIX_RATIO3 AOGAIN 1 MIX_MODE 0 0 0 0 0 0 DEC_PATH_X 0 0 0 0 0/1/2/3 VSCALE_Y 0 0 LIM_656_PB 0 1 1 0 VACTIVE_PB[8] PB_FLDPOL 0 LIM_656_X LIM_656_DEC BGNDEN_PB BGNDEN_Y PAL_DLY_Y 1 1 1 1 AIGAIN2 RM_SAMRATE RM_BITWID RM_SYNC R_ADATM R_MULTCH R_SEQ_0 R_SEQ_2 R_SEQ_4 R_SEQ_6 R_SEQ_8 R_SEQ_A R_SEQ_C R_SEQ_E PB_BITRATE PB_DATMOD PB_SAMRATE PB_BITWID PB_SYNC MIX_MUTE MIX_RATIO0 MIX_RATIO2 MIX_RATIOP MIX_OUTSEL 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 VSFLT_X HSFLT_X VSCALE_X [15:8] VSCALE_X [7:0] HSCALE_X [15:8] HSCALE_X [7:0] 0 VSFLT_PB HSFLT_PB VSCALE_PB [15:8] VSCALE_PB [7:0] HSCALE_PB [15:8] HSCALE_PB [7:0] HSCALE_Y VSFLT_Y HSFLT_Y HDELAY_PB[7:0] HACTIVE_PB[7:0] VDELAY_PB[7:0] VACTIVE_PB[7:0] VDELAY_PB[8] HACTIVE_PB[9:8] HDELAY_PB[9:8] 0 MAN_PBCROP PB_CROP_MD PB_ACT_MD LIM_656_Y1 LIM_656_Y0 LIM_656_Y3 LIM_656_Y2 BGNDCOL AUTOBGNDPB AUTOBGNDY AUTOBGNDX BGNDEN_X PAL_DLY_X 1 PAL_DLY_PB 1 1 1 1 1 Techwell, Inc. www.techwellinc.com 114 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller For Video Decoder VIN0 Address VIN1 VIN2 0xC8 0xC9 0xCA 0xFE Preliminary VIN3 BIT7 0 0 0 BIT6 0 0 OUT_CHID BIT5 0 1 0 BIT4 0 1 0 0x28* BIT3 0 1 1 BIT2 FLD_OFST_PB 1 1 BIT1 FLD_OFST_Y 0 1 BIT0 FLD_OFST_X 0 1 Notes 1. 2. "*" stand for read only register VIN0 ~ VIN3 stand for video input 0 ~ video input 3. For Video Controller (Display path) Address CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 1x00 1x01 1x02 1x03 1x04 1x05 1x06 1x07 1x08 1x09 1x0A 1x0B 1x0C 1x0D 1x0E 1x0F 1x28 1x13 1x29 1x14 1x2A 1x15 1x2E 1x16 1x2F 1x17 1x3C 1x40 1x3D 1x41 1x3E 1x42 1x3F 1x43 BIT7 SYS_5060 0 RECALL_FLD BIT6 BIT5 BIT4 BIT3 BIT2 BIT1 LINK_NUM STRB_FLD BIT0 OVERLAY LINK_LAST_X 0 0 SAVE_FLD NOVID_MODE MUX_MODE 0 STRB_AUTO 0 MUX_OUT_CH0 MUX_OUT_CH2 0 0 LINK_LAST_Y LINK_EN_X TBLINK FRZ_FRAME SAVE_HID SAVE_REQ STRB_REQ 0 0 MUX_FLD 0 INTR_REQX LINK_EN_Y DUAL_PAGE SAVE_ADDR AUTO_ENHACE INVALID_MODE 0 0 0 INTR_CH MUX_OUT_CH1 MUX_OUT_CH3 CHID_MUX_OUT ZM_EVEN_OS ZMENA H_ZM_MD FR_EVEN_OS FR_ODD_OS ZMBNDEN ZMAREAEN ZMAREA ZOOMH ZOOMV BNDCOL BGDCOL BLKCOL FUNC_MODE ANA_PATH_SEL PB_PATH_EN Reserved H_MIRROR V_MIRROR ENHANCE BLANK BOUND BLINK FIELD_OP DVR_IN RECALL_ADDR PB_STOP EVENT_PB PB_CH_NUM 0 0 0 0 0 0 PICHL PICHR PICVT PICVB ZM_ODD_OS ZMBNDCOL 1x10 1x11 1x12 1x16 1x17 1x30 1x31 1x32 1x33 1x18 1x19 1x1A 1x1E 1x1F 1x34 1x35 1x36 1x37 1x20 1x21 1x22 1x26 1x27 1x38 1x39 1x3A 1x3B 1x1B 1x1C 1x1D 1x1E 1x1F 1x44 1x45 1x46 1x47 1x23 1x24 1x25 1x26 1x27 1x48 1x49 1x4A 1x4B 1x2B 1x2C 1x2D 1x2E 1x2F 1x4C 1x4D 1x4E 1x4F FRZ_FLD CH_EN POP_UP RECALL_CH FRZ_CH 0 0 PB_AUTO_EN FLD_CONV 0 0 Notes 1. 2. "*" stand for read only register CH0 ~ CH7 stand for channel 0 ~ channel 7. Techwell, Inc. www.techwellinc.com 115 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller For Video Controller (Record path) Address CH0 CH1 CH2 CH3 1x50 1x51 1x52 1x53 1x54 1x55 1x56 1x57 1x58 1x59 1x5A 1x5B 1x5C 1x5D 1x5E 1x5F 1x63 1x66 1x69 1x64 1x67 1x6A 1x65 1x68 1x6B 1x6C 1x6D 1x6E 1x6F 1x70 1x71 1x72 1x73 1x74 1x75 1x76 1x77 1x78 1x79 1x7A 1x7B 1x7C 1x7D 1x7E 1x7F 1x80 1x81 1x82 1x83 1x84 Preliminary BIT7 BIT6 BIT5 BIT4 BIT3 BIT2 BIT1 BIT0 1x60 1x61 1x62 MEDIAN_MD TM_SLOP TM_THR 0 FRAME_OP FRAME_FLD DIS_MODE 0 0 SIZE_MODE TBLINK FRZ_FRAME TM_WIN_MD 0 0 0 0 0 0 0 0 0 0 0 0 0 STRB_FLD DUAL_PAGE STRB_REQ NOVID_MODE 0 CH_START 0 AUTO_NR_EN INVALID_MODE MUX_MODE TRIG_MODE MUX_FLD PIN_TRIG_MD PIN_TRIG_EN STRB_AUTO QUE_SIZE QUE_PERIOD[7:0] QUE_PERIOD[9:8] EXT_TRIG INTR_REQY MUX_WR_CH QUE_WR QUE_ADDR 0 Q_POS_RD_CTL Q_DATA_RD_CTL MUX_SKIP_EN ACCU_TRIG QUE_CNT_RST QUE_POS_RST MUX_SKIP_CH[15:8] MUX_SKIP_CH[7:0] CHID_MUX_OUT FRZ_FLD BNDCOL BGDCOL BLKCOL CH_EN POP_UP FUNC_MODE NR_EN_DM NR_EN DEC_PATH_Y 0 FRZ_CH H_MIRROR V_MIRROR 0 BLANK BOUND BLINK 0 0 FIELD_OP 0 0 0 0 0 PIC_SIZE3 PIC_SIZE2 PIC_SIZE1 PIC_SIZE0 PIC_POS3 PIC_POS2 PIC_POS1 PIC_POS0 MUX_OUT_CH0 MUX_OUT_CH1 MUX_OUT_CH2 MUX_OUT_CH3 POS_CTL_EN POS_TRIG_MODE POS_TRIG POS_INTR 0 POS_RD_CTL POS_DATA_RD_CTL POS_PERIOD[9:8] POS_FLD_MD POS_SIZE POS_QUE_PER[7:0] POS_CH0 POS_CH1 POS_CH2 POS_CH3 POS_QUE_WR POS_CNT_RST POS_QUE_RST POS_QUE_ADDR IRQENA_RD 0 0 0 0 0 IRQ_POL IRQ_RPT IRQ_PERIOD IRQENA_NOVID_S IRQENA_NOVID_M IRQENA_MD_S IRQENA_MD_M IRQENA_BD_S IRQENA_BD_M IRQENA_ND_S IRQENA_ND_M DET_NOVID_PB 0 0 0 0 0 0 0 0 0 0 0 0 1 SYNC_DEL MCLK_CTL MEM_INIT 0 T_CASCADE_EN 0 0 1 0 0 VIS_ENA VIS_AUTO_EN AUTO_RPT_EN VIS_DET_EN VIS_USER_EN VIS_CODE_EN VIS_RIC_EN 1 VIS_PIXEL_HOS VIS_FLD_OS 0 VIS_PIXEL_WIDTH 0 VIS_DM_MD 0 VIS_LINE_OS VIS_HIGH_VAL Techwell, Inc. www.techwellinc.com 116 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller For Video Controller (Record path) Address CH0 CH1 CH2 CH3 1x85 1x86 1x87 1x88 1x89 1x8A 1x8B 1x8C 1x8D 1x8E 1x8F 1x90 1x91 1x92 1x93 1x94 1x95 1x96 1x97 1x98 1x99 1x9A 1x9B 1x9C 1x9D 1x9E 1x9F Preliminary BIT7 AUTO_VBI_DET BIT6 0 BIT5 VBI_ENA VAV_CHK BIT4 BIT3 BIT2 VBI_FLT_EN VBI_PIXEL_WIDTH VBI_LINE_OS BIT1 CHID_RD_TYPE BIT0 VBI_RD_CTL VIS_LOW_VAL VBI_CODE_EN VBI_RIC_ON VBI_PIXEL_HOS VBI_FLD_OS VBI_SIZE VBI_MID_VALUE DET_CHID_TYPE/{3'b0, auto_valid, det_valid, user_valid} AUTO_CHID0 AUTO_CHID1 AUTO_CHID2 AUTO_CHID3 USER_CHID0 USER_CHID1 USER_CHID2 USER_CHID3 USER_CHID4 USER_CHID5 USER_CHID6 USER_CHID7 DET_CHID0 DET_CHID1 DET_CHID2 DET_CHID3 DET_CHID4 DET_CHID5 DET_CHID6 DET_CHID7 Notes 1. 2. "*" stand for read only register CH0 ~ CH3 stand for channel 0 ~ channel 3. Techwell, Inc. www.techwellinc.com 117 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller For Video Output Address 1xA0 1xA1 1xA2 1xA3 1xA4 1xA5 1xA6 1xA7 1xA8 1xA9 1xAA 1xAB 1xAC 1xAD 1xAE 1xAF 1xB0 1xB1 1xB2 1xB3 1xB4 1xB5 1xB6 1xB7 1xB8 1xB9 1xBA 1xBB 1xBC 1xBD 1xBE 1xBF Preliminary BIT7 BIT6 BIT5 BIT4 BIT3 BIT2 BIT1 BIT0 CCIR_IN_X CCIR_IN_Y DAC_PD_YX 0 DAC_OUT_CX DAC_PD_YY 0 0 0 CCIR601_Y 0 CCIR_OUT_Y CCIR_FLDPOL ENC_HSPOL ENC_VSPOL ENC_FLDPOL ENC_VSDEL ENC_HSDEL[7:0] ENC_HSDEL[9:8] TST_FSC_FREE ACTIVE_VDEL ACTIVE_MD CCIR_STD ACTIVE_HDEL ENC_FSC 0 0 1 ENC_PHALT ENC_ALTRST ENC_PED ENC_CBW_X ENC_YBW_X ENC_CBW_Y ENC_YBW_Y 0 HOUT VOUT FOUT ENC_BAR_X ENC_CKILL_X ENC_BAR_Y ENC_CKILL_Y ENC_CLK_FR_X ENC_CLK_PH_X ENC_CLK_CTL_X ENC_CLK_FR_Y ENC_CLK_PH_Y ENC_CLK_CTL_Y DEC_CLK_FR_X DEC_CLK_PH_X DEC_CLK_CTL_X DEC_CLK_FR_Y DEC_CLK_PH_Y DEC_CLK_CTL_Y 0 0 MPP_MD2 MPP_MD1 MPP_MD0 MPP0_SET_MSB MPP0_SET_LSB MPP0_DATA_MSB MPP0_DATA_LSB MPP1_SET_MSB MPP1_SET_LSB MPP1_DATA_MSB MPP1_DATA_LSB MPP2_SET_MSB MPP2_SET_LSB MPP2_DATA_MSB MPP2_DATA_LSB MEM_INIT_DET 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ENC_IN_X DAC_PD_CX 0 1 CCIR_601_X 0 ENC_MODE CCIR_LMT ENC_VSOFF ENC_IN_Y DAC_OUT_YX DAC_OUT_YY CCIR_OUT_X ENC_VS ENC_FLD Notes 1. "*" stand for read only register Techwell, Inc. www.techwellinc.com 118 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller For Character and Mouse Overlay Address 2x00 2x01 2x02 2x03 2x04 2x05 2x06 2x07 2x08 2x09 0x0A 0x0B 0x0C 2x0D 2x0E 2x0F 2x10 2x11 2x12 2x13 2x14 2x15 2x16 2x17 2x18 2x19 2x1A 2x1B 2x1C 2x1D 2x1E 2x1F Preliminary BIT7 BIT6 BIT5 BIT4 BIT3 BIT2 BIT1 BIT0 OSD_BUF_DATA[31:24] OSD_BUF_DATA[23:16] OSD_BUF_DATA[15:8] OSD_BUF_DATA[7:0] OSD_BUF_WR OSD_BUF_RD_MD 0 0 OSD_BUF_ADDR OSD_START_HPOS OSD_END_HPOS OSD_START_VPOS[7:0] OSD_END_VPOS[7:0] OSD_BL_SIZE OSD_START_VPOS[9:8] OSD_END_VPOS[9:8] OSD_MEM_WR OSD_ACC_EN OSD_MEM_PATH OSD_WR_PAGE 0 OSD_INDEX_RD_MD OSD_INDEX_Y OSD_INDEX_CB OSD_INDEX_CR OSD_INDEX_WR OSD_INDEX_ADDR 0 OSD_RD_PAGE OSD_FLD_X OSD_FLD_Y CUR_ON_X CUR_ON_Y CUR_TYPE CUR_SUB CUR_BLINK 0 CUR_HP [0] CUR_VP [0] CUR_HP CUR_VP CLUT0_Y CLUT0_CB CLUT0_CR CLUT1_Y CLUT1_CB CLUT1_CR CLUT2_Y CLUT2_CB CLUT2_CR CLUT3_Y CLUT3_CB CLUT3_CR TBLINK_OSD ALPHA_OSD ALPHA_2DBOX ALPHA_BOX Notes Techwell, Inc. www.techwellinc.com 119 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller For Single Box B0 2x20 2x21 2x22 2x23 2x24 2x25 Preliminary Address B1 B2 2x26 2x27 2x28 2x29 2x2A 2x2B 2x2C 2x2D 2x2E 2x2F 2x30 2x31 2x38 B3 2x32 2x33 2x34 2x35 2x36 2x37 BIT7 BIT6 BIT5 BOX_PLNMIX_Y BOX_PLNCOL BIT4 BOX_BNDEN_Y BIT3 BIT2 BIT1 BOX_BNDEN_X BOX_VT[0] BIT0 BOXPLNEN_X BOX_VW[0] BOX_BNDCOL 0 0 0 0 BOXPLNEN_Y BOX_PLNMIX_X BOX_HL[0] BOX_HW[0] BOX_HL[8:1] BOX_HW[8:1] BOX_VT[8:1] BOX_VW[8:1] OVL_MD_X OVL_MD_Y Notes 1. B0 ~ B3 stand for single box 0 to 3. For 2D Arrayed Box Overlay Address 2DB0 2DB1 2DB2 2DB3 2x5B 2x5C 2x5D 2x5E 2x5F 2x68 2x70 2x69 2x71 2x6A 2x72 2x6B 2x73 2x6C 2x74 2x6D 2x75 2x6E 2x76 2x6F 2x77 BIT7 BIT6 BIT5 BIT4 BIT3 BIT2 BIT1 BIT0 MASKAREA0_COL MASKAREA1_COL MASKAREA2_COL MASKAREA3_COL 2x78 2x79 2x7A 2x7B 2x7C 2x7D 2x7E 2x7F MDBND3_COL 2DBOX_EN_X 2DBOX_EN_Y 2DBOX_HINV 2DBOX_VINV MDBND2_COL MDBND1_COL 2DBOX_MODE 2DBOX_CUREN 2DBOX_MIX MASKAREA_EN DETAREA_EN 2DBOX_BND_EN 2DBOX_HL[8:1] 2DBOX_HW 2DBOX_VT[8:1] 2DBOX_VW 2DBOX_HNUM 2DBOX_CURHP DETAREA0_COL DETAREA1_COL DETAREA2_COL DETAREA3_COL MDBND0_COL 2DBOX_IN_SEL 2DBOX_HL[0] 2DBOX_VT[0] 2x60 2x61 2x62 2x63 2x64 2x65 2x66 2x67 0 2DBOX_VNUM 2DBOX_CURVP Notes 1. 2DB0 ~ 2DB3 stand for 2D arrayed box 0 to 3. Techwell, Inc. www.techwellinc.com 120 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller For Motion Detector VIN0 2x80 2x81 2x82 2x83 2x84 2x85 2x86 2x88 2x8A 2x8C 2x8E 2x90 2x92 2x94 2x96 2x98 2x9A 2x9C 2x87 2x89 2x8B 2x8D 2x8F 2x91 2x93 2x95 2x97 2x99 2x9B 2x9D 2x9E Preliminary Address VIN1 VIN2 2xA0 2xA1 2xA2 2xA3 2xA4 2xA5 2xA6 2xA8 2xAA 2xAC 2xAE 2xB0 2xB2 2xB4 2xB6 2xB8 2xBA 2xBC 2xA7 2xA9 2xAB 2xAD 2xAF 2xB1 2xB3 2xB5 2xB7 2xB9 2xBB 2xBD 2xBE 2xC0 2xC1 2xC2 2xC3 2xC4 2xC5 2xC6 2xC8 2xCA 2xCC 2xCE 2xD0 2xD2 2xD4 2xD6 2xD8 2xDA 2xDC 2xC7 2xC9 2xCB 2xCD 2xCF 2xD1 2xD3 2xD5 2xD7 2xD9 2xDB 2xDD 2xDE VIN3 2xE0 2xE1 2xE2 2xE3 2xE4 2xE5 2xE6 2xE8 2xEA 2xEC 2xEE 2xF0 2xF2 2xF4 2xF6 2xF8 2xFA 2xFC 2xE7 2xE9 2xEB 2xED 2xEF 2xF1 2xF3 2xF5 2xF7 2xF9 2xFB 2xFD 2xFE BIT7 MD_DIS BIT6 BIT5 BIT4 BIT3 BIT2 BD_LVSENS ND_TMPSENS MD_ALIGN MD_LVSENS MD_SPEED MD_SPSENS BIT1 BIT0 MD_REFFLD BD_CELSENS ND_LVSENS MD_MASK_RD_MD MD_FLD MD_CELLSENS MD_DUAL_EN MD_STRB_EN MD_STRB MD_TMPSENS MD_MASK[15:8] MD_MASK[7:0] DET_NOVID_S DET_MD_S DET_BD_S DET_ND_S DET_NOVID_M DET_MD_M DET_BD_M DET_ND_M Notes 1. VIN0 ~ VIN3 stand for video input 0 ~ video input 3. Techwell, Inc. www.techwellinc.com 121 Oct, 10, 2006 Datasheet Rev. 1.2 TW2835 Video and Audio Controller Recommended Value For Video Decoder VIN0 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E Address VIN1 VIN2 0x10 0x20 0x11 0x21 0x12 0x22 0x13 0x23 0x14 0x24 0x15 0x25 0x16 0x26 0x17 0x27 0x18 0x28 0x19 0x29 0x1A 0x2A 0x1B 0x2B 0x1C 0x2C 0x1D 0x2D 0x1E 0x2E 0x40 0x41 0x42 0x43 0x44 0x45 0x46 0x47 0x48 0x49 0x4A 0x4B 0x4C 0x4D 0x4E 0x4F 0x50 0x51 0x52 0x53 0x54 0x55 0x60 0x61 0x62 0x63 0x64 0x65 0x66 0x67 0x68 VIN3 0x30 0x31 0x32 0x33 0x34 0x35 0x36 0x37 0x38 0x39 0x3A 0x3B 0x3C 0x3D 0x3E 1 CH 8'h00 C8 20 D0 06 F0 08 80 80 80 80 02 06 00 11 00 77 07 45 A0 D0 2F 64 80 80 82 82 00 0F 05 00 00 80 06 00 00 00 88 88 00 00 10 32 54 76 98 NTSC 4 CH 9 CH 16 CH 1 CH 8'h00 88 20 D0 05 20 28 80 80 80 80 82 06 00 11 00 77 07 45 A0 D0 2F 64 80 80 82 82 00 0F 05 00 00 80 06 00 00 00 88 88 00 00 10 32 54 76 98 Preliminary PAL 4 CH 9 CH 16 CH Techwell, Inc. www.techwellinc.com 122 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN0 Address VIN1 VIN2 0x69 0x6A 0x6B 0x6C 0x6D 0x6E 0x6F 0x70 0x71 0x72 0x73 0x74 0x90 0x91 0x92 0x93 0x94 0x95 0x96 0x97 0x98 0x99 0x9A 0xA0 0xA1 0xA2 0xA3 0xA4 0xA5 0xA6 0xA7 0xA8 0xA9 0xAA VIN3 1 CH BA DC FE 00 00 88 88 88 54 00 00 00 00/40/ 80/C0 FF FF FF FF 00 FF FF FF FF 00/40/ 80/C0 00 D0 00 F0 08 00 00 00 07 00 00 F0 FF 00 3C 0F 28 NTSC 4 CH 9 CH 16 CH 1 CH BA DC FE 00 00 88 88 88 54 00 00 00 00/40/ 80/C0 FF FF FF FF 00 FF FF FF FF 00/40/ 80/C0 00 D0 00 20 28 00 00 00 07 00 FF F0 FF 00 3C 0F 28 Preliminary PAL 4 CH 9 CH 16 CH 0x80 0x81 0x82 0x83 0x84 0x85 0x86 0x87 0x88 0x89 0x8A 0x8B 0x8C 0x8D 0x8E 0x8F 0xB0 0xB1 0xB2 0xB3 0xB4 0xB5 0xB6 0xB7 0xB8 0xB9 0xBA 0xBB 0xBC 0xBD 0xBE 0xBF 01/41/ 81/C1 7F FF 7F FF 01 7F FF 7F FF 31/71/ B1/F1 06/46/ 86/C6 55 55 55 55 06 55 55 55 55 - 0B/4B/ 8B/CB 3F FF 3F FF 0B 3F FF 3F FF - 01/41/ 81/C1 7F FF 7F FF 01 7F FF 7F FF 31/71/ B1/F1 06/46/ 86/C6 55 55 55 55 06 55 55 55 55 - 0B/4B/ 8B/CB 3F FF 3F FF 0B 3F FF 3F FF - 0x9B 0xAB 0x9C 0xAC 0x9D 0xAD 0x9E 0xAE 0x9F 0xAF 0xC0 0xC1 0xC2 0xC3 0xC4 0xC5 0xC6 0xC7 0xC8 0xC9 0xCA 0xFE 00 00 00 Techwell, Inc. www.techwellinc.com 123 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller For Video Controller CH0 Address CH1 CH2 1x00 1x01 1x02 1x03 1x04 1x05 1x06 1x07 1x08 1x09 1x0A 1x0B 1x0C 1x0D 1x0E 1x0F 1x10 1x18 1x20 1x28 1x19 1x21 1x1A 1x22 1x1B 1x23 1x1C 1x24 1x1D 1x25 1x1E 1x26 1x1F 1x27 1x30 1x31 1x32 1x33 1x34 1x35 1x36 1x37 1x38 1x39 1x3A 1x3B 1x3C 1x3D 1x3E 1x3F 1x40 ~ 1x4F 1x50 1x51 1x52 1x53 CH3 1 CH 8'h00 00 00 00 00 80 00 00 00 00 00 D7 00 00 00 A7 80 81 82 83 02 00 00 00 00 00 00 00 B4 00 78 00 B4 00 78 00 B4 00 78 00 B4 00 78 00 00 00 00 00 NTSC 4 CH 9 CH 16 CH 1 CH 8'h80 00 00 00 00 80 00 00 00 00 00 D7 00 00 00 A7 80 81 82 83 02 00 00 00 00 00 00 00 B4 00 90 00 B4 00 90 00 B4 00 90 00 B4 00 90 00 00 00 00 00 Preliminary PAL 4 CH 9 CH 16 CH 1x11 1x12 1x13 1x14 1x15 1x16 1x17 1x29 1x2A 1x2B 1x2C 1x2D 1x2E 1x2F 00 5A 00 3C 5A B4 00 3C 00 5A 3C 78 5A B4 3C 78 00 3C 00 28 3C 78 00 28 78 B4 00 28 00 3C 28 50 00 2D 00 1E 2D 5A 00 1E 5A 87 00 1E 87 B4 00 1E 00 5A 00 48 5A B4 00 48 00 5A 48 90 5A B4 48 90 00 3C 00 30 3C 78 00 30 78 B4 00 30 00 3C 30 60 00 2D 00 24 2D 5A 00 24 5A 87 00 24 87 B4 00 24 Techwell, Inc. www.techwellinc.com 124 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller CH0 Address CH1 CH2 1x54 1x55 1x56 1x57 1x58 1x59 1x5A 1x5B 1x5C 1x5D 1x5E 1x5F 1x60 1x63 1x66 1x69 1x64 1x67 1x65 1x68 1x6C 1x6D 1x6E 1x6F 1x70 1x71 1x72 1x73 1x74 1x75 1x76 1x77 1x78 1x79 1x7A 1x7B 1x7C 1x7D 1x7E 1x7F 1x80 1x81 1x82 1x83 1x84 1x85 1x86 1x87 1x88 1x89 1x8A CH3 1 CH 00 80 00 00 00 00 00 00 00 00 00 A7 80 81 82 83 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 88 84 FF 00 51 07 EB 10 A8 00 51 E7 80 NTSC 4 CH 9 CH 16 CH 1 CH 00 80 00 00 00 00 00 00 00 00 00 A7 80 81 82 83 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 88 84 FF 00 51 07 EB 10 A8 00 51 E7 80 Preliminary PAL 4 CH 9 CH 16 CH 1x61 1x62 1x6A 1x6B FF E4 - - - - FF E4 - - Techwell, Inc. www.techwellinc.com 125 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller CH0 Address CH1 CH2 1x8B 1x8C 1x8D 1x8E 1x8F 1x90 ~ 1x9F 1xA0 1xA1 1xA2 1xA3 1xA4 1xA5 1xA6 1xA7 1xA8 1xA9 1xAA 1xAB 1xAC 1xAD 1xAE 1xAF 1xB0 ~ 1xBF CH3 1 CH 00 00 00 00 00 00 77 23 D0 01 C0 10 00 0D 20 09 AA 00 00 00 00 00 00 NTSC 4 CH 9 CH 16 CH 1 CH 00 00 00 00 00 00 77 23 D0 01 C0 10 00 0D 20 4C AA 00 00 00 00 00 00 Preliminary PAL 4 CH 9 CH 16 CH Notes 1. Blanks have the same value of 1 CH. 2. All values are Hexa format. For Motion Detector VIN0 2x80 2x81 2x82 2x83 2x84 2x85 Address VIN1 VIN2 2xA0 2xC0 2xA1 2xC1 2xA2 2xC2 2xA3 2xC3 2xA4 2xC4 2xA5 2xC5 VIN3 2xE0 2xE1 2xE2 2xE3 2xE4 2xE5 NTSC 8'h17 88 08 6A 07 24 PAL 8'h17 88 08 6A 07 24 Notes 1. All values are Hexa format. Techwell, Inc. www.techwellinc.com 126 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Register Description [7] [6] DET_ FORMAT [5] [4] DET_ COLOR [3] LOCK_ COLOR [2] LOCK_ GAIN Preliminary VIN Index [1] LOCK_ OFST [0] LOCK_ HPLL 0 1 2 3 0x00 0x10 0x20 0x30 DET_FORMAT Status of video standard detection (Read only) 0 PAL-B/D 1 2 3 4 5 6 PAL-M PAL-N PAL-60 NTSC-M NTSC-4.43 NTSC-N DET_COLOR Status of color detection (Read only) 0 Color is not detected 1 Color is detected Status of locking for color demodulation loop (Read only) 0 Color demodulation loop is not locked 1 Color demodulation loop is locked Status of locking for AGC loop (Read only) 0 AGC loop is not locked 1 AGC loop is locked Status of locking for clamping loop (Read only) 0 1 Claming loop is not locked Claming loop is locked LOCK_COLOR LOCK_GAIN LOCK_OFST LOCK_HPLL Status of locking for horizontal PLL (Read only) 0 1 Horizontal PLL is not locked Horizontal PLL is locked Techwell, Inc. www.techwellinc.com 127 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN Index Preliminary [3] [2] [1] DET_ NONSTD * [0] DET_ FLD60 * [7] [6] [5] [4] 0 1 2 3 0x01 0x11 0x21 0x31 IFMTMAN IFORMAT AGC PEDEST Notes : * Read only bits IFMTMAN Setting video standard manually with IFORMAT 0 Detect video standard automatically according to incoming video signal (default) 1 IFORMAT Video standard is selected with IFORMAT Force the device to operate in a particular video standard when IFMTMAN is high or to free-run in a particular video standard on no-video status when IFMTMAN is low 0 1 2 3 4 5 6 PAL-B/D (default) PAL-M PAL-N PAL-60 NTSC-M NTSC-4.43 NTSC-N AGC Enable the AGC 0 1 Disable the AGC (default) Enable the AGC PEDEST Enable gain correction for 7.5 IRE black (pedestal) level 0 No pedestal level (0 IRE is ITU-R BT.656 code 16) (default) 1 7.5 IRE setup level (7.5 IRE is ITU-R BT.656 code 16) DET_NONSTD Status of non-standard video detection (Read only) 0 The incoming video source is standard 1 The incoming video source is non-standard Status of field frequency of incoming video (Read only) 0 50Hz field frequency 1 60Hz field frequency DET_FLD60 Techwell, Inc. www.techwellinc.com 128 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] 0 1 2 3 0 1 2 3 0x06 0x16 0x26 0x36 0x02 0x12 0x22 0x32 HDELAY_XY[7:0] 0 0 VACTIVE_ VDELAY_ XY[8] XY[8] HACITIVE_XY[9:8] HDELAY_XY[9:8] HDELAY_XY This 10bit register defines the starting location of horizontal active pixel for display / record path. A unit is 1 pixel. The default value is decimal 32. VIN Index [7] [6] [5] [4] [3] [2] [1] [0] 0 1 2 3 0 1 2 3 0x06 0x16 0x26 0x36 0x03 0x13 0x23 0x33 HACTIVE_XY[7:0] 0 0 VACTIVE_ VDELAY_ XY[8] XY[8] HACITIVE_XY[9:8] HDELAY_XY[9:8] HACTIVE_XY This 10bit register defines the number of horizontal active pixel for display / record path. A unit is 1 pixel. The default value is decimal 720. Techwell, Inc. www.techwellinc.com 129 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] 0 1 2 3 0 1 2 3 0x06 0x16 0x26 0x36 0x04 0x14 0x24 0x34 VDELAY_XY[7:0] 0 0 VACTIVE_ VDELAY_ XY[8] XY[8] HACITIVE_XY[9:8] HDELAY_XY[9:8] VDELAY_XY This 9bit register defines the starting location of vertical active for display / record path. A unit is 1 line. The default value is decimal 6. VIN Index [7] [6] [5] [4] [3] [2] [1] [0] 0 1 2 3 0 1 2 3 0x06 0x16 0x26 0x36 0x05 0x15 0x25 0x35 VACTIVE_XY[7:0] 0 0 VACTIVE_ VDELAY_ XY[8] XY[8] HACITIVE_XY[9:8] HDELAY_XY[9:8] VACTIVE_XY This 9bit register defines the number of vertical active lines for display / record path. A unit is 1 line. The default value is decimal 240. Techwell, Inc. www.techwellinc.com 130 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] 0 1 2 3 0x07 0x17 0x27 0x37 HUE HUE Control the hue information. The resolution is 1.4 / LSB. 0 -180 : : 128 0 (default) : 255 : 180 VIN Index [7] [6] [5] [4] [3] [2] [1] [0] 0 1 2 3 0x08 0x18 0x28 0x38 SAT SAT Control the color saturation. The resolution is 0.8% / LSB. 0 0% : : 128 : 255 100 % (default) : 200 % Techwell, Inc. www.techwellinc.com 131 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] 0 1 2 3 0x09 0x19 0x29 0x39 CONT CONT Control the contrast. The resolution is 0.8% / LSB. 0 0% : : 128 100 % (default) : 255 : 200 % VIN Index [7] [6] [5] [4] [3] [2] [1] [0] 0 1 2 3 0x0A 0x1A 0x2A 0x3A BRT BRT Control the brightness. The resolution is 0.2IRE / LSB. 0 -25 IRE : : 128 : 255 0 (default) : 25 IRE Techwell, Inc. www.techwellinc.com 132 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] YPEAK_ MD 0 1 2 3 0x0B 0x1B 0x2B 0x3B YBWI COMBMD YPEAK_GN YBWI Select the luminance trap filter mode 0 Narrow bandwidth trap filter mode (default) 1 Wide bandwidth trap filter mode Select the adaptive comb filter mode 0,1 Adaptive comb filter mode (default) 2 Force trap filter mode 3 Not supported Select the luminance peaking frequency band 0 4~5 MHz frequency band (default) 1 2~4 MHz frequency band Control the luminance peaking gain 0 1 2 3 4 5 6 7 8 9 10 11 12 13 No peaking (default) 12.5 % 25 % 37.5 % 50 % 62.5 % 75 % 87.5 % 100 % 112.5 % 125 % 137.5 % 150 % 162.5 % COMBMD YPEAK_MD YPEAK_GN 14 175 % 15 187.5 % Techwell, Inc. www.techwellinc.com 133 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] 0 1 2 3 0x0C 0x1C 0x2C 0x3C 0 0 CKILL CTI_GN CKIL Control the color killing mode 0,1 Auto detection mode (default) 2 Color is always alive 3 Color is always killed Control the CTI gain 0 No CTI 1 12.5 % 2 25 % 3 4 5 6 7 8 9 10 11 12 13 14 15 37.5 % 50 % 62.5 % 75 % (default) 87.5 % 100 % 112.5 % 125 % 137.5 % 150 % 162.5 % 175 % 187.5 % CTI_GN Techwell, Inc. www.techwellinc.com 134 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN Index Preliminary [3] [2] SW_ RESET [1] [0] [7] [6] [5] [4] 0 1 2 3 0x0D 0x1D 0x2D 0x3D 0 0 0 0 ANA_SW WPEAK_MD ANA_SW Control the analog input channel switch 0 VIN_A channel is selected (default) 1 VIN_B channel is selected Reset the system by software except control registers. This bit is self-clearing in a few clocks after enabled. 0 Normal operation (default) 1 Enable soft reset Select the automatic white peak control mode. 0 No automatic white peak control (default) 1 Suppress the excessive white peak level into WPEAK_REF level 2 Increase the low level into WPEAK_REF level 3 Suppress and Increase the input level into WPEAK_REF level SW_RESET WPEAK_MD Techwell, Inc. www.techwellinc.com 135 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] 0 1 2 3 0x0E 0x1E 0x2E 0x3E 0 0 0 1 0 0 0 1 This control register is reserved for putting the part into test mode. For normal operation, the above value should be set in this register. Techwell, Inc. www.techwellinc.com 136 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] 0x40 PB_SDEL WPEAK_REF WPEAK_RNG WPEAK_TIME PB_SDEL Control the start point of active video from ITU-R BT.656 digital playback input 0 No delay (default) 1 1ck delay of 27MHz 2 3 2ck delay of 27MHz 3ck delay of 27MHz WPEAK_REF Control the white peak reference level for automatic white peak control 0 100 IRE (default) 1 2 3 110 IRE 130 IRE 140 IRE WPEAK_RNG Control the range of automatic white peak control 0 -3 ~ 3 dB (default) 1 -6 ~ 6 dB 2,3 -9 ~ 9 dB WPEAK_TIME Control the time constant of automatic white peak control loop 0 1 2 3 Slower (default) Slow Fast Faster Techwell, Inc. www.techwellinc.com 137 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] 0 [2] [1] VOGAINYX VOGAINYY [0] [7] MPPCLK_ OEB 0 [6] [5] VOGAINCX [4] 0x41 0x42 0 0 0 0 MPPCLK_OEB Control the tri-state of CLKMPP1/2 output pins 0 Outputs are Tri-state (default) 1 Outputs are enabled Control the gain of analog video output for each DAC 0 1 2 3 4 5 6 7 90.625 % 93.75 % 96.875 % 100 % 103.125 % 106.25 % 109.375 % 112.5 % VOGAIN Techwell, Inc. www.techwellinc.com 138 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] GNTIME [2] [1] OSTIME [0] [7] 0 [6] 1 [5] 0 [4] 0 0x43 GNTIME Control the time constant of gain tracking loop 0 Slower 1 Slow (default) 2 Fast 3 Faster OSTIME Control the time constant of offset tracking loop 0 Slower 1 Slow (default) 2 3 Fast Faster Techwell, Inc. www.techwellinc.com 139 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] [0] [7] 1 [6] 0 [5] [4] 0x44 HSWIDTH HSWIDTH Define the width of horizontal sync output. A unit is 1 pixel. The default value is decimal 32. Index [7] [6] [5] VSMODE [4] FLDPOL [3] HSPOL [2] VSPOL [1] 1 [0] 0 0x45 FLDMODE FLDMODE Select the field flag generation mode 0 Field flag is detected from incoming video (default) 1 Field flag is generated from small accumulator of detected field 2 3 Field flag is generated from medium accumulator of detected field Field flag is generated from large accumulator of detected field VSMODE Control the VS and field flag timing 0 VS and field flag is aligned with vertical sync of incoming video 1 (default) VS and field flag is aligned with HS FLDPOL Select the FLD polarity 0 Odd field is high (default) 1 Even field is high HSPOL Select the HS polarity 0 Low for sync duration (default) 1 High for sync duration VSPOL Select the VS polarity 0 Low for sync duration (default) 1 High for sync duration Techwell, Inc. www.techwellinc.com 140 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] [0] [7] IFCOMP [6] [5] CLPF [4] 0x46 ACCTIME APCTIME IFCOMP Select the IF-compensation filter mode 0 No compensation (default) 1 +1 dB/ MHz 2 +2 dB/ MHz 3 +3 dB/ MHz CLPF Select the Color LPF mode 0 550KHz bandwidth 1 750KHz bandwidth (default) 2 3 950KHz bandwidth 1.1MHz bandwidth ACCTIME Control the time constant of auto color control loop 0 Slower 1 2 3 Slow Fast Faster (default) APCTIME Control the time constant of auto phase control loop 0 1 2 3 Slower Slow Fast Faster (default) Techwell, Inc. www.techwellinc.com 141 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] 0 [2] [1] CDEL [0] [7] 0 [6] 1 [5] C_CORE [4] 0x47 C_CORE Coring to reduce the noise in the chrominance 0 No coring 1 Coring value is within 128 +/- 1 range 2 Coring value is within 128 +/- 2 range (default) 3 Coring value is within 128 +/- 4 range CDEL Adjust the group delay of chrominance path relative to luminance 0 -2.0 pixel 1 -1.5 pixel 2 3 4 5 6 7 -1.0 pixel -0.5 pixel 0.0 pixel (default) 0.5 pixel 1.0 pixel 1.5 pixel Techwell, Inc. www.techwellinc.com 142 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] U_GAIN 0x48 U_GAIN Adjust gain for U (or Cb) component. The resolution is 0.8% / LSB. 0 0% : : 128 : 255 100 % (default) : 200 % Index [7] [6] [5] [4] V_GAIN [3] [2] [1] [0] 0x49 V_GAIN Adjust gain for V (or Cr) component. The resolution is 0.8% / LSB. 0 : 128 : 255 0% : 100 % (default) : 200 % Techwell, Inc. www.techwellinc.com 143 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] U_OFF 0x4A U_OFF U (or Cb) offset adjustment register. The resolution is 0.4% / LSB. 0 -50 % : : 128 0 % (default) : : 255 50 % Index [7] [6] [5] [4] V_OFF [3] [2] [1] [0] 0x4B V_OFF V (or Cr) offset adjustment register. The resolution is 0.4% / LSB. 0 -50 % : : 128 0 % (default) : : 255 50 % Techwell, Inc. www.techwellinc.com 144 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] [0] [7] 0 [6] 0 [5] ADAC_ PD [4] AADC_ PD 0x4C VADC_PD ADAC_PD Power down the audio DAC. 0 Normal operation (default) 1 Power down Power down the audio ADC. 0 Normal operation (default) 1 Power down Power down the video ADC. VADC_PD[3:0] stands for CH3 to CH0. 0 Normal operation (default) 1 Power down AADC_PD VADC_PD Index [7] 0 [6] 0 [5] 0 [4] 0 [3] [2] [1] 1 [0] 1 0x4D NOVID_MD NOVID_MD Select the No-video flag generation mode 0 1 2 3 Faster Fast Slow Slower (default) Techwell, Inc. www.techwellinc.com 145 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] 0 0 0 0 0 0 0 [2] 1 0 0 0 1 0 0 [1] 0 0 0 0 1 0 0 [0] 1 0 0 0 0 0 0 [7] 0 0 0 1 0 0 0 [6] 0 0 0 0 0 0 0 [5] 0 0 0 0 0 0 0 [4] 0 0 0 0 0 0 0 0x4E 0x4F 0x50 0x51 0x52 0x53 0x54 This control register is reserved for putting the part into test mode. For normal operation, the above value should be set in this register. Index [7] [6] FLD [5] [4] [3] [2] VAV [1] [0] 0x55 FLD Status of the field flag for corresponding channel (Read only) FLD[3:0] stands for VIN3 to VIN0. 0 Odd field when FLDPOL (0x46) = 1 1 Even field when FLDPOL (0x46) = 1 VAV Status of the vertical active video signal for corresponding channel (Read only). VAV[3:0] stands for VIN3 to VIN0. 0 1 Vertical blanking time Vertical active time Techwell, Inc. www.techwellinc.com 146 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] AIGAIN0 AIGAIN2 [1] [0] [7] [6] AIGAIN1 AIGAIN3 [5] [4] 0x60 0x61 AIGAIN Select the amplifier's gain for each analog audio input AIN0 ~ AIN3. 0 0.25 1 0.31 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0.38 0.44 0.50 0.63 0.75 0.88 1.00 (default) 1.25 1.50 1.75 2.00 2.25 2.50 2.75 Techwell, Inc. www.techwellinc.com 147 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] RM_ BITWID [0] RM_ SYNC [7] [6] [5] M_ RLSWAP [4] RM_ BITRATE 0x62 M_PBSEL RM_ RM_ DATMOD SAMRATE M_PBSEL Select the playback audio data on the ADATM / AOUT pin. 0 The playback audio input from the first stage chip (default) 1 The playback audio input from the second stage chip 2 3 The playback audio input from the third stage chip The playback audio input from the last stage chip M_RLSWAP Define the sequence of mixing and playback audio data on the ADATM pin. 0 1 Mixing audio on left channel and playback audio on right channel (default) Playback audio on left channel and mixing audio on right channel RM_BITRATE Define the bit rate for record and mixing audio on the ACLKR, ASYNR, ADATR and ADATM pin. 0 256 bit per sample period (256fs) (default) 1 384 bit per sample period (384fs) RM_DATMOD Define the data mode on the ADATR and ADATM pin. 0 1 2's complement data mode (default) Straight binary data mode RM_SAMRATE Define the sample rate for record and mixing audio on the ACLKR, ASYNR, ADATR and ADATM pin. 0 1 8KHz (default) 16KHz RM_BITWID Define the bit width for record and mixing audio on the ADATR and ADATM pin. 0 1 16 bit (default) 8 bit RM_SYNC Define the digital serial audio data format for record and mixing audio on the ACLKR, ASYNR, ADATR and ADATM pin. 0 I2S format (default) 1 DSP format Techwell, Inc. www.techwellinc.com 148 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] 0 [2] R_ADATM [1] [0] [7] 0 [6] 0 [5] 0 [4] 0 0x63 R_MULTCH R_ADATM Select the output mode for the ADATM pin. 0 Digital serial data of mixing audio (default) 1 Digital serial data of record audio Define the number of audio for record on the ADATR pin. 0 2 audios (default) 1 4 audios 2 8 audios 3 16 audios R_MULTCH Techwell, Inc. www.techwellinc.com 149 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] 0x64 0x65 0x66 0x67 0x68 0x69 0x6A 0x6B R_SEQ_1 R_SEQ_3 R_SEQ_5 R_SEQ_7 R_SEQ_9 R_SEQ_B R_SEQ_D R_SEQ_F R_SEQ_0 R_SEQ_2 R_SEQ_4 R_SEQ_6 R_SEQ_8 R_SEQ_A R_SEQ_C R_SEQ_E R_SEQ Define the sequence of record audio on the ADATR pin. Refer to the Fig16 and Table5 for the detail of the R_SEQ_0 ~ R_SEQ_F. The default value of R_SEQ_0 is "0", R_SEQ_1 is "1", ... and R_SEQ_F is "F". 0 AIN1 1 AIN2 : : : : 14 AIN15 15 AIN16 Techwell, Inc. www.techwellinc.com 150 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] PB_ BITWID [0] PB_ SYNC [7] 0 [6] PB_ MASTER [5] PB_ LRSEL [4] PB_ BITRATE 0x6C PB_ PB_ DATMOD SAMRATE PB_MASTER Define the operation mode of the ACLKP and ASYNP pin for playback. 0 Slaver mode (ACLKP and ASYNP is input mode) (default) 1 Master mode (ACLKP and ASYNP is output mode) Select the channel for playback. 0 Left channel audio is used for playback input. (default) 1 Right channel audio is used for playback input. Define the bit rate for playback audio on the ACLKP, ASYNP and ADATP pin. 0 256 bit per sample period (256fs) (default) 1 384 bit per sample period (384fs) Define the data mode on the ADATP pin. 0 2's complement data mode (default) 1 Straight binary data mode Define the sample rate for playback audio on the ACLKP, ASYNP and ADATP pin. 0 8KHz (default) 1 16KHz Define the bit width for playback audio on the ADATP pin. 0 16 bit (default) 1 8 bit Define the digital serial audio data format for playback audio on the ACLKP, ASYNP and ADATP pin. 0 I2S format (default) 1 DSP format PB_LRSEL PB_BITRATE PB_DATMOD PB_SAMRATE PB_BITWID PB_SYNC Techwell, Inc. www.techwellinc.com 151 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] MIX_MUTE [1] [0] [7] 0 [6] 0 [5] MIX_ DERATIO [4] 0x6D MIX_DERATIO Disable the mixing ratio value for all audio. 0 Apply individual mixing ratio value for each audio (default) 1 Apply nominal value for all audio commonly Enable the mute function for each audio. It effects only for mixing. MIX_MUTE[0] : Audio input AIN0. MIX_MUTE[1] : Audio input AIN1. MIX_MUTE[2] : Audio input AIN2. MIX_MUTE[3] : Audio input AIN3. MIX_MUTE[4] : Playback audio input. It effects only for single chip or the last stage chip 0 Normal 1 Muted (default) MIX_MUTE Techwell, Inc. www.techwellinc.com 152 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] 0x6E 0x6F 0x70 MIX_RATIO1 MIX_RATIO3 AOGAIN MIX_RATIO0 MIX_RATIO2 MIX_RATIOP MIX_RATIO Define the ratio values for audio mixing. MIX_RATIO0 : Audio input AIN0. MIX_RATIO1 : Audio input AIN1. MIX_RATIO2 : Audio input AIN2. MIX_RATIO3 : Audio input AIN3. MIX_RATIOP : Playback audio input. It effects only for single chip or the last stage chip. 0 0.25 1 0.31 2 0.38 3 4 5 6 7 8 9 10 11 12 0.44 0.50 0.63 0.75 0.88 1.00 (default) 1.25 1.50 1.75 2.00 13 2.25 14 2.50 15 2.75 Techwell, Inc. www.techwellinc.com 153 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] [0] [7] [6] AOGAIN [5] [4] 0x70 MIX_RATIOP AOGAIN Define the amplifier gain for analog audio output. 0 0.25 1 0.31 2 0.38 3 4 5 6 7 8 9 10 11 12 0.44 0.50 0.63 0.75 0.88 1.00 (default) 1.25 1.50 1.75 2.00 13 2.25 14 2.50 15 2.75 Techwell, Inc. www.techwellinc.com 154 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] MIX_OUTSEL [7] 0 [6] 1 [5] MIX_MODE [4] [1] [0] 0x71 MIX_MODE Control the mixing mode for audio mixing. 0 Average mode (default) 1 Just summation mode Define the final audio output for analog and digital mixing out. 0 Select record audio of channel 0 1 Select record audio of channel 1 2 Select record audio of channel 2 3 Select record audio of channel 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Select record audio of channel 4 Select record audio of channel 5 Select record audio of channel 6 Select record audio of channel 7 Select record audio of channel 8 Select record audio of channel 9 Select record audio of channel 10 Select record audio of channel 11 Select record audio of channel 12 Select record audio of channel 13 Select record audio of channel 14 Select record audio of channel 15 Select playback audio of the first stage chip Select playback audio of the second stage chip Select playback audio of the third stage chip MIX_OUTSEL 19 Select playback audio of the last stage chip 20 Select mixed audio (default) Techwell, Inc. www.techwellinc.com 155 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] 0 0 0 [2] 0 0 0 [1] 0 0 0 [0] 0 0 0 [7] 0 0 0 [6] 0 0 0 [5] 0 0 0 [4] 0 0 0 0x72 0x73 0x74 This control register is reserved for putting the part into test mode. For normal operation, the above value should be set in this register. Techwell, Inc. www.techwellinc.com 156 Oct, 10, 2006 Datasheet Rev. 1.2 w w w . D a t a S h e e t . i n TW2835 Video and Audio Controller CH 0 1 2 3 Index 0x80 0x90 0xA0 0xB0 DEC_PATH_X 0 0 VSFLT_X [7] [6] [5] [4] [3] [2] Preliminary [1] [0] HSFLT_X DEC_PATH_X Select the video input for each channel scaler in display path. 0 1 2 3 Video input from internal video decoder on VIN0 pin (default) Video input from internal video decoder on VIN1 pin Video input from internal video decoder on VIN2 pin Video input from internal video decoder on VIN3 pin VSFLT_X Select the vertical anti-aliasing filter mode for display path. 0 Full bandwidth (default) 1 0.25 Line-rate bandwidth 2,3 0.18 Line-rate bandwidth Select the horizontal anti-aliasing filter mode for display path. 0 Full bandwidth (default) 1 2 MHz bandwidth 2 1.5 MHz bandwidth 3 1 MHz bandwidth HSFLT_X Techwell, Inc. www.techwellinc.com 157 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path CH 0 1 2 X 3 0 1 2 3 0 1 2 PB 3 0 1 2 3 Index 0x81 0x91 0xA1 0xB1 0x82 0x92 0xA2 0xB2 0x86 0x96 0xA6 0xB6 0x87 0x97 0xA7 0xB7 VSCALE_PB[7:0] VSCALE_PB[15:8] VSCALE_X[7:0] VSCALE_X[15:8] [7] [6] [5] [4] [3] [2] Preliminary [1] [0] VSCALE The 16 bit register defines a vertical scaling ratio. The actual vertical scaling ratio is VSCALE/(2^16 - 1). The default value is 0xFFFF. Path CH 0 1 2 Index 0x83 0x93 0xA3 0xB3 0x84 0x94 0xA4 0xB4 0x88 0x98 0xA8 0xB8 0x89 0x99 0xA9 0xB9 [7] [6] [5] [4] [3] [2] [1] [0] HSCALE_X[15:8] X 3 0 1 2 3 0 1 2 3 0 1 2 3 HSCALE_X[7:0] HSCALE_PB[15:8] PB HSCALE_PB[7:0] HSCALE The 16 bit register defines a horizontal scaling ratio. The actual horizontal scaling ratio is HSCALE/(2^16 - 1). The default value is 0xFFFF. Techwell, Inc. www.techwellinc.com 158 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller CH 0 1 2 3 Index 0x85 0x95 0xA5 0xB5 0 0 0 0 VSFLT_PB [7] [6] [5] [4] [3] [2] Preliminary [1] [0] HSFLT_PB VSFLT_PB Select the vertical anti-aliasing filter mode for PB path. 0 Full bandwidth (default) 1 0.25 Line-rate bandwidth 2,3 0.18 Line-rate bandwidth HSFLT_PB Select the horizontal anti-aliasing filter mode for PB path. 0 1 2 3 Full bandwidth (default) 2 MHz bandwidth 1.5 MHz bandwidth 1 MHz bandwidth Techwell, Inc. www.techwellinc.com 159 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller CH 0 1 2 3 Index 0x8A 0x9A 0xAA 0xBA [7] 0 1 2 3 VSCALE_ Y HSCALE_ Y VSFLT_Y [6] [5] [4] [3] [2] Preliminary [1] [0] HSFLT_Y VSCALE_Y Enable the half vertical scaling for record path. 0 1 Disable the vertical scaling (default) Enable the half vertical scaling HSCALE_Y Enable the half horizontal scaling for record path. 0 Disable the horizontal scaling (default) 1 Enable the half horizontal scaling VSFLT_PB Select the vertical anti-aliasing filter mode for record path. 0 Full bandwidth (default) 1 0.25 Line-rate bandwidth 2,3 0.18 Line-rate bandwidth HSFLT_PB Select the horizontal anti-aliasing filter mode for record path. 0 Full bandwidth (default) 1 2 3 2 MHz bandwidth 1.5 MHz bandwidth 1 MHz bandwidth Techwell, Inc. www.techwellinc.com 160 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller CH Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] 0 1 2 3 0 1 2 3 0x06 0x16 0x26 0x36 0x02 0x12 0x22 0x32 HDELAY_PB[7:0] 0 0 VACTIVE_ VDELAY_ PB[8] PB[8] HACITIVE_PB[9:8] HDELAY_PB[9:8] HDELAY_PB This 10bit register defines the starting location of horizontal active pixel for PB path. A unit is 1 pixel. The default value is decimal 0. CH Index [7] [6] [5] [4] [3] [2] [1] [0] 0 1 2 3 0 1 2 3 0x06 0x16 0x26 0x36 0x03 0x13 0x23 0x33 HACTIVE_PB[7:0] 0 0 VACTIVE_ VDELAY_ PB[8] PB[8] HACITIVE_PB[9:8] HDELAY_PB[9:8] HACTIVE_PB This 10bit register defines the number of horizontal active pixel for PB path. A unit is 1 pixel. The default value is decimal 720. Techwell, Inc. www.techwellinc.com 161 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller CH Index Preliminary [3] [2] [1] [0] [7] [6] [5] [4] 0 1 2 3 0 1 2 3 0x06 0x16 0x26 0x36 0x04 0x14 0x24 0x34 VDELAY_PB[7:0] 0 0 VACTIVE_ VDELAY_ PB[8] PB[8] HACITIVE_PB[9:8] HDELAY_PB[9:8] VDELAY_PB This 9bit register defines the starting location of vertical active for PB path. A unit is 1 line. The default value is decimal 0. CH Index [7] [6] [5] [4] [3] [2] [1] [0] 0 1 2 3 0 1 2 3 0x06 0x16 0x26 0x36 0x05 0x15 0x25 0x35 VACTIVE_PB[7:0] 0 0 VACTIVE_ VDELAY_ PB[8] PB[8] HACITIVE_PB[9:8] HDELAY_PB[9:8] VACTIVE_PB This 9bit register defines the number of vertical active lines for PB path. A unit is 1 line. The default value is decimal 240. Techwell, Inc. www.techwellinc.com 162 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] PB_ CROP_MD [7] 0 [6] PB_ FLDPOL [5] 0 [4] 0 [1] [0] 0xC0 MAN_ PBCROP PB_ACT_MD PB_FLDPOL Select the FLD polarity of playback input 0 1 Even field is high Odd field is high MAN_PB_CROP Select manual cropping mode for playback input 0 Auto cropping mode with fixed cropping position (default) 1 Manual cropping mode with HDELAY/HACTIVE and VDELAY/VACTIVE PB_CROP_MD Select the cropping mode for playback input 0 Normal record mode or frame record mode (default) 1 Cropping for DVR record mode or DVR frame record mode input PB_ACT_MD Select the horizontal active size for playback input when MAN_PB_CROP is low 0 720 pixels (default) 1 704 pixels 2/3 640 pixels Techwell, Inc. www.techwellinc.com 163 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] LIM_656_Y0 LIM_656_Y2 [7] LIM_656_ PB 0 [6] LIM_656_ X LIM_656_ DEC [5] [4] LIM_656_Y1 LIM_656_Y3 [0] 0xC1 0xC2 LMT_656_PB Control the range of output level for PB path. 0 Output ranges are limited to 1 ~ 254 (default) 1 Output ranges are limited to 16 ~ 235 LMT_656_X Control the range of output level for display path. 0 Output ranges are limited to 1 ~ 254 (default) 1 Output ranges are limited to 16 ~ 235 Control the range of output level for record path. 0 Output ranges are limited to 1 ~ 254 (default) 1 Output ranges are limited to 16 ~ 254 2 3 4 5 6 7 Output ranges are limited to 24 ~ 254 Output ranges are limited to 32 ~ 254 Output ranges are limited to 1 ~ 235 Output ranges are limited to 16 ~ 235 Output ranges are limited to 24 ~ 235 Output ranges are limited to 32 ~ 235 LMT_656_Y LMT_656_DEC Control the range of output level for decoder bypass mode. 0 Output ranges are limited to 1 ~ 254 (default) 1 Output ranges are limited to 16 ~ 235 Techwell, Inc. www.techwellinc.com 164 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] AUTO BGNDPB [7] [6] [5] [4] [1] AUTO BGNDY [0] AUTO BGNDX 0xC3 0xC4 BGNDEN_PB BGNDEN_Y BGNDCOL BGNDEN_X BGNDEN Enable the background color for each channel. BGNDEN[3:0] stands for CH3 to CH0. 0 1 Background color is disabled (default) Background color is enabled BLKCOL Select the background color when BGNDEN = "1". 0 Blue color (default) 1 Black color AUTO_BGND Select the decoder background mode. 0 Manual background mode (default) 1 Automatic background mode when No-video is detected. Techwell, Inc. www.techwellinc.com 165 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] [2] [1] [0] [7] 1 [6] 1 [5] 1 [4] 1 0xC5 0xC6 PAL_DLY_Y PAL_DLY_X PAL_DLY_PB PAL_DLY Select the PAL delay line mode. 0 Vertical scaling mode is selected in chrominance path (default) 1 PAL delay line mode is selected in chrominance path Index [7] 1 [6] 1 [5] 1 [4] 1 [3] 1 [2] 1 [1] 1 [0] 1 0xC7 This control register is reserved for putting the part into test mode. For normal operation, the above value should be set in this register. Index [7] 0 [6] 0 [5] 0 [4] 0 [3] 0 [2] FLD_ OFST_PB [1] FLD_ OFST_Y [0] FLD_ OFST_X 0xC8 FLDOS Remove the field offset between ODD and EVEN field. 0 Normal operation (default) 1 Remove the field offset between ODD and EVEN field Index [7] 0 [6] 0 [5] 1 [4] 1 [3] 1 [2] 1 [1] 0 [0] 0 0xC9 This control register is reserved for putting the part into test mode. For normal operation, the above value should be set in this register. Techwell, Inc. www.techwellinc.com 166 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index Preliminary [3] 1 [7] 0 [6] OUT_CHID [5] 0 [4] 0 [2] 1 [1] 1 [0] 1 0xCA OUT_CHID Enable the channel ID format in the horizontal blanking period for Decoder Bypass mode 0 Disable the channel ID format (default) 1 Enable the channel ID format Index [7] [6] [5] DEV_ID * [4] [3] [2] [1] REV_ID * [0] 0xFE Notes "*" stand for read only register DEV_ID REV_ID The TW2835 product ID code is 00101. The revision number. Techwell, Inc. www.techwellinc.com 167 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x00 [7] SYS_5060 [6] OVERLAY [5] LINK _LAST_X [4] LINK _LAST_Y [3] [2] Preliminary [1] LINK_NUM [0] LINK_EN_X LINK_EN_Y SYS_5060 Select the standard format for video controller. 0 60Hz, 525 line format (default) 1 50Hz, 625 line format Control the overlay between display and record path. 0 Disable the overlay (default) 1 Enable the overlay Define the lowest slaver chip in chip-to-chip cascade operation. 0 Master or middle slaver chip (default) 1 The lowest slaver chip Control the chip-to-chip cascade operation for display and record path. 0 1 Disable the cascade operation (default) Enable the cascade operation OVERLAY LINK_LAST LINK_EN LINK_NUM Define the stage number of chip-to-chip cascade connection. 0 Master chip (default) 1 2 3 1st slaver chip 2nd slaver chip 3rd slaver chip Techwell, Inc. www.techwellinc.com 168 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path X Index 1x01 [7] 0 [6] 0 [5] 0 [4] TBLINK [3] [2] Preliminary [1] [0] FRZ_FRAME DUAL_PAGE STRB_FLD TBLINK Control the blink period of channel boundary. 0 Blink for every 30 fields (default) 1 Blink for every 60 fields Select the field or frame mode on freeze status. 0 Field display mode (default) 1 Frame display mode Enable the dual page operation. 0 Normal strobe operation for each channel (default) 1 Enable the dual page operation Control the field mode for strobe operation. 0 Capture odd field only (default) 1 Capture even field only 2 Capture first field of any field 3 Capture frame FRZ_FRAME DUAL_PAGE STRB_FLD Techwell, Inc. www.techwellinc.com 169 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path X Index 1x02 [7] RECALL_ FLD [6] [5] [4] SAVE_HID [3] [2] Preliminary [1] [0] SAVE_FLD SAVE_ADDR RECALL_FLD Select the field or frame data on recalling picture. 0 1 Recall frame data from SDRAM (default) Recall field data from SDRAM SAVE_FLD Select the field or frame data to save. 0 Save first odd field data to SDRAM (default) 1 2 3 Save first even field data to SDRAM Save first any field data to SDRAM Save first frame (odd and even field) data to SDRAM SAVE_HID Control the priority to save picture. 0 Save picture as shown in screen (default) 1 Save picture even though hidden under other picture Define the save address of SDRAM. The unit address has 4Mbit memory space. 0-3 Reserved for normal operation. Do not use this address. (default = 0) 4-11 Available address for 64M SDRAM 12-15 Reserved for normal operation. Do not use this address. SAVE_ADDR Path X Index 1x03 [7] [6] [5] [4] [3] [2] [1] [0] SAVE_REQ SAVE_REQ Request to save for each channel. SAVE_REQ[7:0] stands for channel 7 to 0 0 None operation (default) 1 Request to start saving picture Techwell, Inc. www.techwellinc.com 170 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path X Index 1x04 [7] [6] [5] [4] [3] [2] STRB_REQ Preliminary [1] [0] STRB_REQ Request strobe operation. STRB_REQ[7:0] stands for channel 7 to 0 0 None operation (default) 1 Request to start strobe operation Path X Index 1x05 [7] [6] [5] 0 [4] 0 [3] 0 [2] AUTO_ ENHANCE [1] [0] NOVID_MODE INVALID_MODE NOVID_MODE Select the indication method for no-video channel 0 Bypass (default) 1 Capture last image 2 Blanked with blank color 3 Capture last image and blink channel boundary Enable auto enhancement mode in field display mode 0 Manual enhancement mode in field display mode (default) 1 Auto enhancement mode in field display mode Select the indication mode for no channel area In horizontal and vertical active region 0 Background layer with background color (default) 1 Y = 0, Cb/Cr = 128 2 Y/Cb/Cr = 0 3 Y/Cb/Cr = 0 AUTO_ENHANCE INVALID_MODE In horizontal and vertical blanking region 0 Y = 16, Cb/Cr = 128 (default) 1 2 3 Background layer with background color Y = 0, Cb = {0, F, V, 0, Cascade, linenum[8:7]}, Cr = {0, linenum[6:0]} Y/Cb/Cr = 0 Techwell, Inc. www.techwellinc.com 171 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path X Index 1x06 [7] MUX_MODE Preliminary [3] 0 [2] 0 [1] 0 [0] 0 [6] 0 [5] MUX_FLD [4] MUX_MODE Define the switch operation mode 0 Switch still mode (default) 1 Switch live mode Select the field mode on switch still mode 0 Odd Field (default) 1 Even Field 2,3 Capture Frame MUX_FLD Path X Index 1x07 [7] STRB_AUTO [6] 0 [5] 0 [4] INTR_REQX [3] [2] INTR_CH [1] [0] STRB_AUTO Enable automatic strobe mode when FUNC_MODE = "1" 0 User strobe mode (default) 1 Automatic strobe mode Request to start the interrupt switch operation in display path 0 None operation (default) 1 Request to start the interrupt switch operation in display path Define the channel number for interrupt switch operation INTR_CH[3:2] represents the stage of cascaded chips for interrupt switch operation 0 Master chip (default) 1 1st slaver chip 2 2nd slaver chip 3 3rd slaver chip INTR_REQX INTR_CH INTR_CH[1:0] represents the channel number for interrupt switch operation 0 Channel 0 (default) 1 Channel 1 2 3 Channel 2 Channel 3 Techwell, Inc. www.techwellinc.com 172 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path X Index 1x08 1x09 [7] [6] [5] [4] [3] [2] MUX_OUT_CH0 * MUX_OUT_CH2 * Preliminary [1] [0] MUX_OUT_CH1 * MUX_OUT_CH3 * Notes "*" stand for read only register MUX_OUT_CH0 MUX_OUT_CH1 MUX_OUT_CH2 MUX_OUT_CH3 Channel information in current field/frame for interrupt switch operation Channel information in next field/frame for interrupt switch operation Channel information after 2 fields for interrupt switch operation Channel information after 3 fields for interrupt switch operation MUX_OUT_CH [3:2] represents the stage of cascaded chips for interrupt switch operation 0 Master chip (default) 1 1st slaver chip 2 2nd slaver chip 3 3rd slaver chip MUX_OUT_CH [1:0] represents the channel number for interrupt switch operation 0 Channel 0 (default) 1 2 3 Channel 1 Channel 2 Channel 3 Techwell, Inc. www.techwellinc.com 173 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path X Index 1x0A [7] [6] [5] [4] [3] [2] CHID_MUX_OUT * Preliminary [1] [0] Notes "*" stand for read only register CHID_MUX_OUT Channel ID of current field/frame in interrupt switch operation CHID_MUX_OUT [7] represents the channel ID latch enabling pulse 0->1 1->0 Rising edge for channel ID Update Falling edge after 16 clock * 18.5 ns from rising edge CHID_MUX_OUT [6] represents the updated picture in interrupt switch operation 0 1 No Updated Updated by new switching CHID_MUX_OUT [5] represents the field mode in interrupt switch operation 0 1 Frame Mode Field Mode CHID_MUX_OUT [4] represents the analog switch path 0 Analog switch 0 path 1 Analog switch 1 path CHID_MUX_OUT [3:2] represents the stage of cascaded chips for interrupt switch operation 0 Master chip 1 2 3 1st slaver chip 2nd slaver chip 3rd slaver chip CHID_MUX_OUT [1:0] represents the channel number for interrupt switch operation 0 Channel 0 1 Channel 1 2 Channel 2 3 Channel 3 Techwell, Inc. www.techwellinc.com 174 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path X Index 1x0B [7] [6] [5] [4] [3] [2] ZM_EVEN_OS ZM_ODD_OS FR_EVEN_OS Preliminary [1] [0] FR_ODD_OS ZM_EVEN_OS Even field offset coefficient when zoom is enabled 0 No Offset 1 + 0.25 Offset 2 3 + 0.5 Offset + 0.75 Offset (default) ZM_ODD_OS Odd field offset coefficient when zoom is enabled 0 No Offset 1 2 3 + 0.25 Offset (default) + 0.5 Offset + 0.75 Offset FR_EVEN_OS Even field offset coefficient when the enhancement is enabled 0 No Offset 1 + 0.25 Offset (default) 2 + 0.5 Offset 3 + 0.75 Offset Odd field offset coefficient when the enhancement is enabled 0 No Offset 1 + 0.25 Offset 2 + 0.5 Offset 3 + 0.75 Offset (default) FR_ODD_OS Techwell, Inc. www.techwellinc.com 175 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path X Index 1x0C [7] ZMENA [6] H_ZM_MD [5] [4] [3] [2] ZMBNDCOL ZMBNDEN ZMAREAEN Preliminary [1] ZMAREA [0] ZMENA Enable the zoom function. 0 Disable the zoom function (default) 1 Enable the zoom function Select the zoom mode for only horizontal direction 0 2x zoom for both horizontal and vertical direction (default) 1 2x zoom for horizontal direction Define the boundary color for zoomed area 0 0% Black (default) 1 25% Gray 2 75% Gray 3 100% White H_ZM_MD ZMBNDCOL ZMBNDEN Enable the boundary for zoomed area. 0 Disable the boundary for zoomed area (default) 1 Enable the boundary for zoomed area Enable the mark for zoomed area 0 Disable the mark for zoom area (default) 1 Enable the mark for zoom area Control the effect for zoomed area. 0 10 IRE bright up for inside of zoomed area (default) 1 20 IRE bright up for inside of zoomed area 2 10 IRE bright up for outside of zoomed area 3 20 IRE bright up for outside of zoomed area ZMAREAEN ZMAREA Techwell, Inc. www.techwellinc.com 176 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path X Index 1x0D [7] [6] [5] [4] ZOOMH [3] [2] Preliminary [1] [0] ZOOMH Define the horizontal left point of zoomed area. 4 pixels/step. 0 Left end value (default) : : 180 Right end value Path X Index 1x0E [7] [6] [5] [4] ZOOMV [3] [2] [1] [0] ZOOMV Define the vertical top point of zoom area. 2 lines/step. 0 Top end value (default) : : 120 : 144 Bottom end value for 60Hz, 525 lines system : Bottom end value for 50Hz, 625 lines system Techwell, Inc. www.techwellinc.com 177 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path X Index 1x0F [7] FRZ_FLD [6] [5] BNDCOL [4] [3] BGDCOL [2] Preliminary [1] BLKCOL [0] FRZ_FLD Select the image for freeze function or for last image capture on video loss. 0 Last image (default) 1 Last image of 1 field before 2 3 Last image of 2 fields before Last image of 3 fields before BNDCOL Define the channel boundary color. 0 0% Black 1 25% Gray 2 75% Gray 3 100% White (default) Channel boundary color is changed according to this value when boundary is blinking. 0 100% White 1 100% White 2 0% Black 3 0% Black (default) BGDCOL Define the background color. 0 0% Black 1 40% Gray (default) 2 3 75% Gray 100% Amplitude 100% Saturation Blue BLKCOL Define the color of the blanked channel. 0 0% Black 1 2 3 40% Gray 75% Gray 100% Amplitude 100% Saturation Blue (default) Techwell, Inc. www.techwellinc.com 178 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path CH 0 1 2 3 4 5 6 7 Index 1x10 1x18 1x20 1x28 1x13 1x1B 1x23 1x2B CH_EN POP_UP 0 FUNC_ MODE[0] FUNC_MODE ANA_ PATH_ SEL PB_PATH_ EN [7] [6] [5] [4] [3] [2] Preliminary [1] [0] 0 (RESERVED) 1 (RESERVED) 2 (RESERVED) 3 (RESERVED) 0 (RESERVED) 1 (RESERVED) 2 (RESERVED) 3 (RESERVED) X CH_EN Enable the channel. 0 1 Disable the channel (default) Enable the channel POP_UP Enable pop-up. 0 Disable pop-up (default) 1 Enable pop-up FUNC_MODE Select the operation mode. 0 Live mode (default) 1 Strobe mode 2-3 Switch mode for Channel 0/1/2/3 ANA_PATH_SEL Select the switching path on PB display mode with PB_AUTO_EN = 1 0 Main channel selection (default) 1 Sub channel selection Select the input between Live and PB for each channel 0 Normal live analog input (default) 1 PB path input The following value should be set for proper operation. (default = 0) 1x10/1x13 0 1x18/1x1B 1 1x20/1x23 2 1x28/1x2B 3 PB_PATH_EN RESERVED Techwell, Inc. www.techwellinc.com 179 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path CH 0 1 2 3 4 5 6 7 Index 1x11 1x19 1x21 1x29 1x14 1x1C 1x24 1x2C RECALL_ EN FREEZE H_MIRROR V_MIRROR ENHANCE BLANK [7] [6] [5] [4] [3] [2] Preliminary [1] [0] X BOUND BLINK RECALL_EN Enable the recall function of main channel. 0 1 Disable the recall function (default) Enable the recall function FREEZE Enable the freeze function of main channel. 0 Normal operation (default) 1 Enable the freeze function H_MIRROR Enable the horizontal mirroring function of main channel. 0 Normal operation (default) 1 Enable the horizontal mirroring function Enable the vertical mirroring function of main channel. 0 Normal operation (default) 1 Enable the vertical mirroring function Enable the image enhancement function of main channel. 0 Normal operation (default) 1 Enable the image enhancement function Enable the blank of main channel. 0 1 Disable the blank (default) Enable the blank V_MIRROR ENHANCE BLANK BOUND Enable the channel boundary of main channel. 0 1 Disable the channel boundary (default) Enable the channel boundary BLINK Enable the boundary blink of main channel when boundary is enabled. 0 Disable the boundary blink (default) 1 Enable the boundary blink 180 Oct, 10, 2006 Datasheet Rev. 1.2 Techwell, Inc. www.techwellinc.com www.DataSheet.in TW2835 Video and Audio Controller Path CH 0 1 2 3 4 5 6 7 Index 1x12 1x1A 1x22 1x2A 1x15 1x1D 1x25 1x2D 0 0 FLD_OP DVR_IN [7] [6] [5] [4] [3] [2] Preliminary [1] [0] X RECALL_ADDR FLD_OP Enable Field to Frame conversion mode. 0 1 Normal operation (default) Enable Field to Frame conversion mode DVR_IN Enable DVR to normal conversion mode. 0 Normal operation (default) 1 DVR to normal conversion mode RECALL_ADDR Define the recall address for main channel. (default = 0) 0-3 Reserved address. Do not use this value 4-15 Available address for 64M SDRAM Techwell, Inc. www.techwellinc.com 181 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path CH 0 Index 1x16 1x1E 1x26 1x2E [7] PB_AUTO _EN 0 0 0 FLD_CONV PB_STOP [6] [5] [4] [3] [2] Preliminary [1] [0] X 1 2 3 EVENT _PB PB_CH_NUM PB_AUTO_EN Enable the auto strobe and auto cropping function for playback input 0 Disable the auto strobe/cropping function (default) 1 Enable the auto strobe/cropping function Enable Frame to Field conversion mode 0 Normal operation (default) 1 Enable Frame to Field conversion mode Disable the auto strobe operation for playback input 0 Normal operation (default) 1 Disable the auto strobe operation for playback input Enable the event strobe function for playback input 0 1 Disable the event strobe function for playback input (default) Enable the event strobe function for playback input FLD_CONV PB_STOP EVEN_PB PB_CH_NUM Select the channel number from playback input for display (default = 0) PB_CH_NUM[3:2] represents the stage of cascaded chips 0 1 2 3 Master chip 1st slaver chip 2nd slaver chip 3rd slaver chip PB_CH_NUM[1:0] represents the channel number 0 Channel 0 1 Channel 1 2 Channel 2 3 Channel 3 Techwell, Inc. www.techwellinc.com 182 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path CH 0 1 2 3 Index 1x17 1x1F 1x27 1x2F 0 0 0 0 0 0 [7] [6] [5] [4] [3] [2] Preliminary [1] [0] X 0 0 This is reserved register. For normal operation, the above value should be set in this register. Techwell, Inc. www.techwellinc.com 183 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path CH 0 1 2 3 4 5 6 7 Index 1x30 1x34 1x38 1x3C 1x40 1x44 1x48 1x4C PICHL [7] [6] [5] [4] [3] [2] Preliminary [1] [0] X PICHL Define the horizontal left position of channel 0 Left end (default) : : 180 Right end Path CH 0 1 2 3 4 5 6 7 Index 1x31 1x35 1x39 1x3D 1x41 1x45 1x49 1x4D [7] [6] [5] [4] [3] [2] [1] [0] X PICHR PICHR Define the horizontal right position of channel region 0 Left end (default) : : 180 Right end Techwell, Inc. www.techwellinc.com 184 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path CH 0 1 2 3 4 5 6 7 Index 1x32 1x36 1x3A 1x3E 1x42 1x46 1x4A 1x4E PICVT [7] [6] [5] [4] [3] [2] Preliminary [1] [0] X PICVT Define the vertical top position of channel region. 0 : 120 : 144 Top end (default) : Bottom end for 60Hz system : Bottom end for 50Hz system Path CH 0 1 2 3 4 5 6 7 Index 1x33 1x37 1x3B 1x3F 1x43 1x47 1x4B 1x4F [7] [6] [5] [4] [3] [2] [1] [0] X PICVB PICVB Define the vertical bottom position of channel region. 0 Top end (default) : 120 : 144 : Bottom end for 60Hz system : Bottom end for 50Hz system Techwell, Inc. www.techwellinc.com 185 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x50 [7] MEDIAN_MD [6] TM_SLOP [5] [4] [3] [2] TM_THR Preliminary [1] [0] MEDIAN_MD Select the noise reduction filter mode. 0 Adaptive median filter mode (default) 1 Simple median filter mode Select the slope of adaptive median filter mode 0 Gradient is 0 1 Gradient is 1 (default) 2 Gradient is 2 3 Gradient is 3 TM_SLOP TM_THR Select the threshold of adaptive median filter mode 0 No threshold : 8 : 31 : Median value (default) : Max value Techwell, Inc. www.techwellinc.com 186 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x51 [7] 0 [6] FRAME_OP [5] FRAME_ FLD [4] DIS_MODE [3] 0 [2] 0 Preliminary [1] [0] SIZE_MODE FRAME_OP Select the frame operation mode for record path. 0 1 Normal operation mode (Default) Frame operation mode DIS_MODE Select the record mode depending on FRAME_OP. When FRAME_OP = 0 0 1 Normal record mode (Default) DVR normal record Mode When FRAME_OP = 1 0 1 FRAME_FLD Frame record mode DVR frame record mode Select the displayed field when FRAME_OP = "1". 0 Odd field is displayed (default) 1 Even field is displayed SIZE_MODE Select the active pixel size per line 0 720 pixels (default) 1 704 pixels 2 3 640 pixels 640 pixels Techwell, Inc. www.techwellinc.com 187 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x52 [7] TBLINK [6] FRZ_FRAME [5] [4] [3] 0 [2] 0 TM_WIN_MD Preliminary [1] 0 [0] 0 TBLINK Control the blink period of channel boundary. 0 Blink for every 30 fields (default) 1 Blink for every 60 fields Select field or frame display mode on freeze status 0 Field display mode (default) 1 Frame display mode Select the mask type of median/adaptive median filter 0 9x9 mask (default) 1 Cross mask 2 Multiplier mask 3 Vertical bar mask FRZ_FRAME TM_WIN_MD Path Y Index 1x53 [7] 0 [6] 0 [5] 0 [4] 0 [3] 0 [2] 0 [1] 0 [0] 0 This is reserved register. For normal operation, the above value should be set in this register. Techwell, Inc. www.techwellinc.com 188 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x54 [7] 0 [6] [5] [4] DUAL_PAGE [3] [2] STRB_FLD STRB_REQ Preliminary [1] [0] STRB_FLD Control the field mode for strobe operation. 0 Capture odd field only (default) 1 Capture even field only 2 3 Capture first field of any field Capture frame DUAL_PAGE Enable dual page operation. 0 Normal strobe operation for each channel (default) 1 Enable the dual page operation STRB_REQ Request the strobe operation. STRB_REQ[3:0] represents the channel 3 to 0 0 1 None operation (default) Request to start strobe operation Techwell, Inc. www.techwellinc.com 189 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x55 [7] [6] [5] 0 [4] CH_START [3] 0 [2] AUTO_NR_ EN Preliminary [1] [0] NOVID_MODE INVALID_MODE NOVID_MODE Select the indication method for no video detected channel 0 1 2 3 Bypass (default) Capture last image Blanked with blank color Capture last image and blink channel boundary CH_START Enable the digital channel ID in horizontal boundary of channel 0 Disable the digital channel ID in horizontal boundary (default) 1 Enable the digital channel ID in horizontal boundary Enable the noise reduction filter automatically when night is detected 0 Disable auto noise reduction filter operation (default) 1 Enable auto noise reduction filter operation Select the indication mode for no channel area In horizontal and vertical active region 0 Background layer with background color (default) 1 Y = 0, Cb/Cr = 128 2 Y/Cb/Cr = 0 3 Y/Cb/Cr = 0 In horizontal and vertical blanking region 0 Y = 16, Cb/Cr = 128 (default) 1 Background layer with background color 2 Y = 0, Cb = {0, F, V, 0, Cascade, linenum[8:7]}, Cr = {0, linenum[6:0]} 3 Y/Cb/Cr = 0 AUTO_NR_EN INVALID_MODE Techwell, Inc. www.techwellinc.com 190 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x56 1x57 [7] STRB_AUTO Preliminary [3] [2] [1] [0] [6] [5] MUX_FLD [4] MUX_MODE TRIG_MODE PIN_TRIG_MD QUE_SIZE PIN_TRIG_EN MUX_MODE Define the switch mode. 0 1 Switch channel with still picture (default) Switch channel with live picture TRIG_MODE Define the switch trigger mode. 0 1 MUX with external trigger from host (default) MUX with internal trigger MUX_FLD Control the capturing field for switch operation. 0 Capture odd field only (default) 1 2 3 Capture even field only Capture frame Capture frame PIN_TRIG_MD Select the triggering input on external trigger mode 0 1 2 3 No triggering by VLINKI Pin (default) Triggering by positive edge of VLINKI pin Triggering by negative edge of VLINKI pin Triggering by both positive and negative edge of VLINKI pin PIN_TRIG_EN Enable triggering by VLINKI Pin [0] is stand for switching control, [1] is stand for popup position control 0 Disable pin triggering (default) 1 Enable pin triggering Enable automatic strobe mode when FUNC_MODE = "1" 0 Manual strobe mode (default) 1 Automatic strobe mode Define the actually using queue size in switching mode. 0 Queue size = 1 (default) :: 127 Queue size = 128 STRB_AUTO QUE_SIZE Techwell, Inc. www.techwellinc.com 191 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x58 1x59 QUE_PERIOD [9:8] [7] [6] [5] [4] [3] [2] QUE_PERIOD [7:0] EXT_TRIG INTR_REQ Preliminary [1] [0] MUX_WR_CH QUE_PERIOD Control the trigger period for internal trigger mode. 0 : 1023 Trigger period = 1 field (default) : Trigger period = 1024 fields EXT_TRIG Make trigger when TRIG_MODE = "0" (external trigger mode). 0 None operation (default) 1 Request to start MUX with external trigger mode Request to start the switch operation by interrupt 0 1 None operation (default) Request to start the switch operation by interrupt INTR_REQ MUX_WR_CH Define the channel number to be written in internal MUX queue or in interrupt trigger. MUX_WR_CH[3:2] stands for stage of cascaded chips 0 Master chip (default) 1 1st slaver chip 2 2nd slaver chip 3 3rd slaver chip MUX_WR_CH[1:0] stands for channel number 0 Channel 0 (default) 1 Channel 1 2 Channel 2 3 Channel 3 Techwell, Inc. www.techwellinc.com 192 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x5A [7] QUE_WR [6] [5] [4] [3] QUE_ADDR [2] Preliminary [1] [0] QUE_WR Control to write the data of internal queue. 0 None operation (default) 1 Request to write the QUE_CH in QUE_ADDR of internal queue Define the queue address. 0 1st queue address (default) :: 127 128th queue address QUE_ADDR Techwell, Inc. www.techwellinc.com 193 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Index 1x5B Y 1x5C 1x5D [7] 0 [6] Q_POS_RD _CTL [5] [4] [3] [2] Preliminary [1] [0] Q_DATA_RD_CTL MUX_ QUE_CNT_ QUE_POS_ ACCU_TRIG SKIP_EN RST RST MUX_SKIP_CH[15:8] MUX_SKIP_CH[7:0] Q_POS_RD_CTL Control the read mode of the QUE_ADDR 0 1 Current queue address of internal queue (default) Written value into the QUE_ADDR Q_DATA_RD_CTL Control the read mode of the MUX_WR_CH 0 Current queue data of internal queue (default) 1 Written value into the MUX_WR_CH 2,3 Queue data at the QUE_ADDR MUX_SKIP_EN Enable the switch skip mode 0 Disable the switch skip mode 1 Enable the switch skip mode ACCU_TRIG Adjust the switch timing in external triggering via the VLINKI pin 0 Output is delayed in 4 fields from triggering (default) 1 Output is matched with triggering QUE_CNT_RST Reset the internal field counter to count queue period. 0 None operation (default) 1 Reset the field counter Reset the queue address. 0 None operation (default) 1 Reset the queue address and restart address Define the switch skip channel MUX_SKIP_CH[15:0] stands for channel 15 ~ 0 including cascaded chip 0 Normal operation (default) 1 Skip channel QUE_POS_RST MUX_SKIP_CH Techwell, Inc. www.techwellinc.com 194 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x5E [7] [6] [5] [4] [3] [2] CHID_MUX_OUT * Preliminary [1] [0] Notes "*" stand for read only register CHID_MUX_OUT Channel ID of current field/frame in switch operation (Read only register) CHID_MUX_OUT [7] represents the channel ID latch enabling pulse 0->1 1->0 Rising edge for updating the channel ID Falling edge after 16 clock * 18.5 ns from rising edge CHID_MUX_OUT [6] represents the updated picture in switch operation 0 No Updated 1 Updated by New Switching CHID_MUX_OUT [5] represents the field mode in switch operation 0 Frame mode 1 Field mode CHID_MUX_OUT [4] represents the analog switching path 0 Analog switching 0 path 1 Analog switching 1 path CHID_MUX_OUT [3:2] represents the stage of cascaded chip for switch operation 0 Master chip 1 1st slaver chip 2 3 2nd slaver chip 3rd slaver chip CHID_MUX_OUT [1:0] represents the channel number for switch operation 0 Channel 0 1 2 3 Channel 1 Channel 2 Channel 3 Techwell, Inc. www.techwellinc.com 195 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x5F [7] FRZ_FLD [6] [5] BNDCOL [4] [3] BGDCOL [2] Preliminary [1] BLKCOL [0] FRZ_FLD Select the image for freeze function or for last capturing mode on video loss. 0 Last image (default) 1 Last image of 1 field before 2 3 Last image of 2 fields before Last image of 3 fields before BNDCOL Define the boundary color of channel. 0 0% Black 1 25% Gray 2 75% Gray 3 100% White (default) Channel boundary color is changed according to this value when boundary is blinking. 0 100% White 1 100% White 2 0% Black 3 0% Black (default) BGDCOL Define the background color. 0 0% Black 1 40% Gray (default) 2 75% Gray 3 100% Amplitude 100% Saturation Blue BLKCOL Define the color of the blanked channel. 0 0% Black 1 40% Gray 2 3 75% Gray 100% Amplitude 100% Saturation Blue (default) Techwell, Inc. www.techwellinc.com 196 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path CH 0 Y 1 2 3 Index 1x60 1x63 1x66 1x69 CH_EN POP_UP FUNC_MODE NR_EN_DM NR_EN [7] [6] [5] [4] [3] [2] Preliminary [1] [0] DEC_PATH_Y CH_EN Enable the channel. 0 1 Disable the channel (default) Enable the channel POP_UP Enable the pop-up attribute. 0 Disable the pop-up attribute (default) 1 Enable the pop-up attribute FUNC_MODE Select the operation mode. 0 Live mode (default) 1 Strobe mode 2-3 Switch mode NR_EN NR_EN_DM Enable the noise reduction filter in main path with ANA_SW = 0 Enable the noise reduction filter in sub path with ANA_SW = 1 0 1 Disable the noise reduction filter (defaut) Enable the noise reduction filter DEC_PATH_Y Select the video input for each channel. 0 Video input from internal video decoder on VIN0 pins (default) 1 2 3 Video input from internal video decoder on VIN1 pins Video input from internal video decoder on VIN2 pins Video input from internal video decoder on VIN3 pins Techwell, Inc. www.techwellinc.com 197 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path CH 0 1 2 3 Index 1x61 1x64 1x67 1x6A 0 FREEZE H_MIRROR V_MIRROR 0 BLANK [7] [6] [5] [4] [3] [2] Preliminary [1] [0] Y BOUND BLINK FREEZE Enable the freeze function of main channel. 0 1 Normal operation (default) Enable the freeze function H_MIRROR Enable the horizontal mirroring function of main channel. 0 Normal operation (default) 1 Enable the horizontal mirroring function V_MIRROR Enable the vertical mirroring function of main channel. 0 Normal operation (default) 1 Enable the vertical mirroring function BLANK Enable the blank of main channel. 0 Disable the blank (default) 1 Enable the blank Enable the channel boundary of main channel. 0 Disable the channel boundary (default) 1 Enable the channel boundary Enable the boundary blink of main channel when boundary is enabled. 0 Disable the boundary blink (default) 1 Enable the boundary blink BOUND BLINK Techwell, Inc. www.techwellinc.com 198 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path CH 0 1 2 3 Index 1x62 1x65 1x68 1x6B 0 0 FIELD_OP 0 0 0 [7] [6] [5] [4] [3] [2] Preliminary [1] [0] Y 0 0 FIELD_OP Enable Field to Frame conversion mode. 0 1 Normal operation (default) Enable Field to Frame conversion mode Path Y Index 1x6C [7] [6] [5] [4] [3] [2] [1] [0] PIC_SIZE3 PIC_SIZE2 PIC_SIZE1 PIC_SIZE0 PIC_SIZE Define the channel size in normal record mode or DVR normal record mode 0 Half Size for both direction (360x120/144) (default) 1 Half size for vertical size (720x120/144) 2 Half size for horizontal size (360x240/288) 3 Full size (720x240/288) in Frame record mode or DVR frame record mode 0 Half size for horizontal size (360x240/288) 1 Full size for horizontal size (720x240/288) 2/3 Not supported Techwell, Inc. www.techwellinc.com 199 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x6D [7] [6] [5] [4] [3] [2] PIC_POS3 PIC_POS2 PIC_POS1 Preliminary [1] [0] PIC_POS0 PIC_POS Define the channel start position in Normal record mode 0 No offset for both horizontal and vertical direction (default) 1 2 3 Half offset for horizontal and no offset for vertical direction No offset for horizontal and half offset for vertical direction Half offset for horizontal and half offset for vertical direction in Frame record mode 0 1 2 3 No offset for both horizontal and vertical direction Half offset for horizontal and no offset for vertical direction No offset for horizontal and field offset for vertical direction Half offset for horizontal and field offset for vertical direction in DVR normal record mode 0 No offset for both horizontal and vertical direction 1 Quarter offset for vertical direction 2 Half offset for vertical direction 3 Three Quarter offset for vertical direction in DVR Frame record mode 0 No offset for both horizontal and vertical direction 1 Half offset for vertical direction 2 3 Field offset for vertical direction Field and half offset for vertical direction Techwell, Inc. www.techwellinc.com 200 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x6E 1x6F [7] [6] [5] [4] [3] [2] MUX_OUT_CH0 * MUX_OUT_CH2 * Preliminary [1] [0] MUX_OUT_CH1 * MUX_OUT_CH3 * Notes "*" stand for read only register MUX_OUT_CH0 MUX_OUT_CH1 MUX_OUT_CH2 MUX_OUT_CH3 Channel Information in current field/frame for switch operation Channel Information in next field/frame for switch operation Channel Information after 2 fields for switch operation Channel Information after 3 fields for switch operation MUX_OUT_CH [3:2] represents the stage of cascaded chips 0 Master chip (default) 1 1st slaver chip 2 2nd slaver chip 3 3rd slaver chip MUX_OUT_CH [1:0] represents the channel number 0 Channel 0 (default) 1 Channel 1 2 Channel 2 3 Channel 3 Techwell, Inc. www.techwellinc.com 201 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x70 [7] POS_CTL _EN [6] [5] [4] [3] 0 [2] POS_RD _CTL POS_TRIG POS_TRIG POS_INTR _MODE Preliminary [1] [0] POS_DATA_RD_CTL POS_CTL_EN Enable the position/popup control 0 1 Disable the position/popup control (default) Enable the position/popup control POS_TRIG_MODE Select the position/popup trigger mode 0 External trigger mode (default) 1 Internal trigger mode POS_TRIG Request the external trigger on external trigger mode 0 None Operation (default) 1 Request to start position/popup control in external trigger mode POS_INTR Request to start position/popup control with interrupt 0 None Operation (default) 1 Request to start position/popup control with interrupt Control the read mode for the POS_QUE_ADDR 0 Current queue address for internal position/popup queue (default) 1 Written value into the POS_QUE_ADDR POS_RD_CTL POS_DATA_RD_CTL Control the read mode for the POS_CH 0 Current queue data for internal queue position (default) 1 Written POS_CH value 2 Queue data of the POS_QUE_ADDR 3 Queue data of the POS_QUE_ADDR Techwell, Inc. www.techwellinc.com 202 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Index 1x71 Y 1x72 1x73 1x74 POS_CH0 POS_CH2 [7] [6] [5] POS_FLD_ MD Preliminary [3] [2] POS_QUE_SIZE [1] [0] [4] POS_QUE_PER[9:8] POS_QUE_PER [7:0] POS_CH1 POS_CH3 POS_QUE_SIZE Control the position/popup queue size 0 Queue size = 1 (default) :: 31 Queue size = 32 POS_FLD_MD Select the position/popup queue period unit 0 Frame (default) 1 Field POS_QUE_PER Control the trigger period for internal trigger mode. 0 Trigger period = 1 field or frame (default) : : 1023 Trigger period = 1024 fields or frames POS_CH Define the channel for each region POS_CH0 stands for no offset region of both H/V POS_CH1 stands for half offset of H POS_CH2 stands for half offset of V POS_CH3 stands for half offset of both H/V POS_CH [3:2] stands for the stage of cascaded chips 0 Master chip (default) 1 2 3 1st slaver chip 2nd slaver chip 3rd slaver chip POS_CH [1:0] stands for the channel number 0 1 2 3 Channel 0 (default) Channel 1 Channel 2 Channel 3 Techwell, Inc. www.techwellinc.com 203 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Path Y Index 1x75 [7] POS_QUE _WR [6] POS_CNT _RST [5] POS_QUE _RST [4] [3] [2] POS_QUE_ADDR Preliminary [1] [0] POS_QUE_WR Control to write the data of internal position queue 0 1 None operation (default) Write data into the POS_CH register at the POS_QUE_ADDR POS_CNT_RST Reset the internal field counter to count queue period of position queue. 0 None operation (default) 1 Reset the field counter POS_QUE_RST Reset the queue address of position queue. 0 None operation (default) 1 Reset the queue address and restart address POS_QUE_ADDR Define the queue address. 0 1st queue address (default) :: 31 32nd queue address Techwell, Inc. www.techwellinc.com 204 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x76 1x77 [7] IRQENA_RD [6] 0 [5] 0 [4] 0 [3] 0 [2] 0 Preliminary [1] IRQ_POL [0] IRQ_RPT IRQ_PERIOD IRQENA_RD Select the read mode for IRQENA_XX registers 0 1 Read the Status/Event information (default) IRQ event will be cleared after host reads IRQENA_XX registers. Read the written data IRQ event is not cleared even if host reads IRQENA_XX registers. IRQ_POL Select the IRQ polarity. 0 Active high (default) 1 Active low Select the IRQ mode. 0 IRQ pin maintains the state "1" until the interrupt request is cleared (default) 1 Interrupt request is repeated with 5msec period via IRQ pin when the interrupt is not cleared in long time. Control the interrupt generation period (The unit is field). 0 Immediate generation of interrupt when any Interrupt happens : : 255 Interrupt generation by the duration of the IRQ_PERIOD [6] [5] [4] [3] [2] [1] [0] IRQ_RPT IRQ_PERIOD Index 1x78 [7] IRQENA_NOVID IRQENA_NOVID Enable the interrupt for video loss detection. IRQENA_NOVID[3:0] stand for VIN3 to VIN0 with ANMA_SW = 0 IRQENA_NOVID[7:4] stand for VIN3 to VIN0 with ANMA_SW = 1 0 Video-loss interrupt is disabled (default) 1 Video-loss interrupt is enabled The read information is determined by the IRQENA_RD (1x76). When the IRQ_ENA_RD = "0", the information is like the following and the interrupt will be cleared when the register is read by host. 0 Video is alive (default) 1 Video loss is detected Techwell, Inc. www.techwellinc.com 205 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x79 1x7A 1x7B [7] [6] [5] [4] [3] [2] IRQENA_MD IRQENA_BD IRQENA_ND Preliminary [1] [0] IRQENA_MD Enable the interrupt for motion detection. IRQENA_MD[3:0] stand for VIN3 to VIN0 with ANA_SW = 0 IRQENA_MD[7:4] stand for VIN3 to VIN0 with ANA_SW = 1 0 1 Motion interrupt is disabled (default) Motion interrupt is enabled The read information is determined by the IRQENA_RD (1x76). When the IRQ_ENA_RD = "0", the information is like the following and the interrupt will be cleared when the register is read by host. 0 No motion is detected (default) 1 Motion is detected IRQENA_BD Enable the interrupt for blind detection. IRQENA_BD [3:0] stand for VIN3 to VIN0 with ANA_SW = 0. IRQENA_BD [7:4] stand for VIN3 to VIN0 with ANA_SW = 1. 0 Blind interrupt is disabled (default) 1 Blind interrupt is enabled The read information is determined by the IRQENA_RD (1x76). When the IRQ_ENA_RD = "0", the information is like the following and the interrupt will be cleared when the register is read by host. 0 No blind is detected (default) 1 IRQENA_ND Blind is detected Enable the interrupt for night detection. IRQENA_ND [3:0] stand for VIN3 to VIN0 with ANA_SW = 0. IRQENA_ND [7:4] stand for VIN3 to VIN0 with ANA_SW = 1. 0 1 Night interrupt is disabled (default) Night interrupt is enabled The read information is determined by the IRQENA_RD (1x76). When the IRQ_ENA_RD = "0", the information is like the following and the interrupt will be cleared when the register is read by host. 0 Day is detected (default) 1 Night is detected Techwell, Inc. www.techwellinc.com 206 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x7C [7] [6] [5] [4] [3] 0 [2] 0 PB_NOVID_DET* 0 Preliminary [1] [0] 0 Notes "*" stand for read only register PB_NOVID_DET Status for playback input 0 Playback input is alive 1 Video-loss is detected for playback input Techwell, Inc. www.techwellinc.com 207 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x7D [7] [6] [5] [4] 0 [3] [2] Preliminary [1] [0] This is reserved register. For normal operation, the above value should be set in this register. Index 1x7E [7] 1 [6] [5] SYNC_DEL [4] [3] [2] MCLKDEL [1] [0] SYNC_DEL Control relative data delay for cascade channel extension SYNC_DEL should be defined to have 2 offset from slaver chip. Please refer to Fig 49 ~ Fig 52 for reference. The default value is 0. MCLKDEL Control the clock delay of the CLK54MEM pin The delay can be controlled about 1ns. The default value is 0. Index 1x7F [7] MEM_INIT [6] 0 [5] T_CASCADE _EN [4] 0 [3] 0 [2] 1 [1] 0 [0] 0 MEM_INIT Initialize the operation mode of SDRAM. This is cleared by itself after setting "1". 0 None operation (default) 1 Request to start initializing operation mode of SDRAM T_CASCADE_EN Enable the infinite cascade mode for display path 0 Normal operation (default) 1 Enable the infinite cascade mode for display path Techwell, Inc. www.techwellinc.com 208 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x80 1x81 [7] VIS_ENA [6] [5] [4] [3] [2] VIS_AUTO_ AUTO_RPT_ VIS_USER_ VIS_CODE_ VIS_DET_EN EN EN EN EN VIS_PIXEL_HOS Preliminary [1] VIS_RIC_ EN [0] 1 VIS_ENA Enable the Analog channel ID during vertical blanking interval 0 Disable the Analog channel ID (default) 1 Enable the Analog channel ID Enable the Auto channel ID In Analog channel ID 0 Disable the Auto channel ID (default) 1 Enable the Auto channel ID Enable the Auto channel ID repetition mode in Analog channel ID 0 Disable the Auto channel ID repetition mode (default) 1 Enable the Auto channel ID repetition mode Enable the Detection channel ID in Analog channel ID 0 1 Disable the Detection channel ID (default) Enable the Detection channel ID VIS_AUTO_EN AUTO_RPT_EN VIS_DET_EN VIS_USER_EN Enable the User channel ID in Analog channel ID 0 Disable the User channel ID (default) 1 Enable the User channel ID VIS_CODE_EN Enable the Digital channel ID 0 Disable the Digital channel ID (default) 1 Enable the Digital channel ID VIS_RIC_EN Enable the run-in clock of Analog channel ID during VBI 0 Disable the run-in clock (default) 1 Enable the run-in clock Define the horizontal starting offset for Analog channel ID 0 No offset (default) : : Table 1 255 pixel Offset VIS_PIXEL_HOS Techwell, Inc. www.techwellinc.com 209 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x82 1x83 1x84 1x85 [7] 0 [6] VIS_DM_MD [5] 0 0 VIS_HIGH_VAL VIS_LOW_VAL [4] [3] [2] VIS_PIXEL_WIDTH VIS_LINE_OS VIS_FLD_OS Preliminary [1] [0] VIS_FLD_OS Control the vertical starting offset of each field for Analog channel ID 0 1 2 3 Odd : 1 Line, Even : 0 Line (default) Odd : 1 Line, Even : 1 Line Odd : 1 Line, Even : 2 Line Odd : 1 Line, Even : 3 Line VIS_DM_MD Select the non-realtime mode for Detection channel ID 0 Normal mode (default) 1 Non-realtime Mode VIS_PIXEL_WIDTH Control the pixel width of each bit for Analog channel ID 0 1 pixel :: 31 32 pixels (default) VBI_LINE_OS Control the vertical starting offset from field transition for Analog channel ID 0 No offset : : 8 7 lines (default) : : Table 1 31 lines VIS_HIGH_VAL VIS_LOW_VAL Magnitude value for bit "1" of Analog channel ID (default = 235) Magnitude value for bit "0" of Analog channel ID (default = 16) Techwell, Inc. www.techwellinc.com 210 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x86 [7] AUTO_VBI _DET [6] 0 [5] VBI_ENA [4] [3] [2] Preliminary [1] [0] CHID_RD_ VBI_CODE_ VBI_RIC_ON VBI_FLT_EN VBI_RD_CTL TYPE EN AUTO_VBI_DET Select the detection mode of Analog channel ID for playback input 0 1 Manual detection mode for Analog channel ID (default) Automatic detection mode for Analog channel ID VBI_ENA Enable the Analog channel ID detection for playback input 0 Disable the Analog channel ID detection (default) 1 Enable the Analog channel ID detection VBI_CODE_EN Enable the Digital channel ID detection for playback input 0 Disable the Digital channel ID detection mode (default) 1 Enable the Digital channel ID detection mode VBI_RIC_ON Select the run-in clock mode for Analog channel ID 0 No run-in clock mode (default) 1 Run-in clock mode Select the LPF filter mode for playback input 0 Bypass mode (default) 1 Enable the LPF filter Control the read mode of channel ID decoder 0 Read the channel valid data from channel ID decoder (default) 1 Read the channel ID type from channel ID decoder Control the read mode of channel ID for channel ID CODEC (default = 0) Table 1 Read the written data into USER_CHID registers (1x90 ~ 1x97) VBI_FLT_EN CHID_RD_TYPE VBI_RD_CTL Read the encoded result in DET_CHID registers (1X98 ~ 1x9F) Read the encoded ID data from AUTO_CHID registers. (1x8C ~ 1x8F) Table 1 Read the decoded ID data from USER_CHID registers (1x90 ~ 1x97) Read the decoded result for DET_CHID registers (1X98 ~ 1x9F) Read the decoded ID data from AUTO_CHID registers (1x8C ~ 1x8F) Techwell, Inc. www.techwellinc.com 211 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x87 1x88 VBI_FLD_OS VAV_CHK [7] [6] [5] [4] [3] [2] VBI_PIXEL_HW VBI_PIXEL_HOS Preliminary [1] [0] VBI_PIXEL_HOS Define the horizontal starting offset of Analog channel ID When Manual detection mode of Analog channel ID (AUTO_VBI_DET = 0) 0 No offset (Not supported in No run-in clock mode) (default) :: Table 1 255 pixel offset When Auto detection mode of Analog channel ID (AUTO_VBI_DET = 1), this register notifies the detected horizontal starting offset for Analog channel ID. VBI_FLD_OS Control the vertical starting offset of each field for Analog channel ID 0 Odd : 1 Line, Even : 0 Line (default) 1 Odd : 1 Line, Even : 1 Line 2 Odd : 1 Line, Even : 2 Line 3 Odd : 1 Line, Even : 3 Line Enable the channel ID detection in vertical active period 0 Enable the channel ID detection for VBI period only (default) 1 Enable the channel ID detection for VBI and vertical active period Control the pixel width for each bit of Analog channel ID 0 1 pixel (default) :: Table 1 32 pixels VAV_CHK VBI_PIXEL_HW Techwell, Inc. www.techwellinc.com 212 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x89 1x8A 1x8B [7] [6] VBI_LINE_WIDTH VBI_MID_VAL CHID_TYPE/CHID_VALID * [5] [4] [3] [2] VBI_LINE_OS Preliminary [1] [0] Notes "*" stand for read only register VBI_LINE_WIDTH Control the line width for Analog channel ID When Manual detection mode of Analog channel ID (AUTO_VBI_DET = 0) 1 line : Table 1 8 lines (default) When Auto detection mode of Analog channel ID (AUTO_VBI_DET = 1), this register notifies the detected line width for Analog channel ID. VBI_LINE_OS Control the vertical starting offset from field transition for Analog channel ID 0 No offset : : 7 lines (default) : Table 1 31 lines VBI_MID_VAL Define the threshold level to detect bit "0" or bit "1" from Analog channel ID (default = 128) CHID_VALID Status for validity of detected channel ID when CHID_RD_TYPE = 0 CHID_VALID[4] stands for Auto Channel ID CHID_VALID[3] stands for Detection Channel ID 0 CHID_VALID[2] stands for Detection Channel ID 1 CHID_VALID[1] stands for User Channel ID 0 CHID_VALID[0] stands for User Channel ID 1 0 Not Valid 1 CHID_TYPE Valid 8 : 0 : Indication of the detected channel ID type when CHID_RD_TYPE = 1 CHID_TYPE[5:0] stands for line number for Analog channel ID 0 Auto channel ID 1 User/Detection channel ID Techwell, Inc. www.techwellinc.com 213 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1x8C 1x8D 1x8E 1x8F 1x90 1x91 1x92 1x93 1x94 1x95 1x96 1x97 1x98 1x99 1x9A 1x9B 1x9C 1x9D 1x9E 1x9F [7] [6] [5] [4] [3] [2] AUTO_CHID0* AUTO_CHID1* AUTO_CHID2* AUTO_CHID3* USER_CHID0 USER_CHID1 USER_CHID2 USER_CHID3 USER_CHID4 USER_CHID5 USER_CHID6 USER_CHID7 DET_CHID0 * DET_CHID1 * DET_CHID2 * DET_CHID3 * DET_CHID4 * DET_CHID5 * DET_CHID6 * DET_CHID7 * Preliminary [1] [0] Notes "*" stand for read only register AUTO_CHID USER_CHID Data information of Auto channel ID Data information of User channel ID (default = 0) USER_CHID 0/1/2/3 stands for 1st line channel ID USER_CHID 4/5/6/7 stands for 2nd line channel ID Data information of Detection channel ID DET_CHID 0/1/2/3 stands for 1st line channel ID DET_CHID 4/5/6/7 stands for 2nd line channel ID Read mode depends on VBI_RD_CTL register 0 Encoded Auto/User/Detection channel ID 1 Decoded Auto/User/Detection channel ID DET_CHID Techwell, Inc. www.techwellinc.com 214 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1xA0 [7] ENC_IN_X [6] [5] ENC_IN_Y [4] [3] [2] CCIR_IN_X Preliminary [1] [0] CCIR_IN_Y ENC_IN Select the video data for analog output of video encoder. 0 Video data of display path without OSD and mouse overlay (default) 1 Video data of display path with OSD and mouse overlay 2 3 Video data of record path without OSD and mouse overlay Video data of record path with OSD and mouse overlay CCIR_IN Select the video data for ITU-R BT 656 digital output. 0 Video data of display path without OSD and mouse overlay (default) 1 2 3 Video data of display path with OSD and mouse overlay Video data of record path without OSD and mouse overlay Video data of record path with OSD and mouse overlay Index [7] [6] 0 [5] [4] [3] DAC_PD_YX [2] 0 [1] [0] 1xA1 DAC_PD_CX DAC_OUT_YX DAC_OUT_CX DAC_PD_YX DAC_PD_CX Enable the power down of VAOYX DAC. Enable the power down of VAOCX DAC. 0 Normal operation (default) 1 Enable power down of DAC Define the analog video format for VAOYX DAC. Define the analog video format for VAOCX DAC. 0 No Output (default) 1 CVBS for display path 2 Luminance for display path 3 Chrominance for display path DAC_OUT_YX DAC_OUT_CX Techwell, Inc. www.techwellinc.com 215 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1xA2 [7] 1 [6] [5] DAC_OUT_YY [4] [3] DAC_PD_YY [2] 0 0 Preliminary [1] [0] 0 DAC_PD_YY Enable the power down of VAOYY DAC. 0 Normal operation (default) 1 Enable power down of DAC Define the analog video format for VAOYY DAC. 0 No Output (default) 1 CVBS for display path 2 Not supported 3 4 5 6 7 Not supported Not supported CVBS for record path Not supported Not supported DAC_OUT_YY Path Format VAOYX Ouptput VAOCX VAOYY No Output O O O CVBS O O O Display Luma O O X Chroma O O X Record CVBS X X O Techwell, Inc. www.techwellinc.com 216 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1xA3 [7] CCIR_601 [6] 0 [5] [4] [3] CCIR_601_ INV [2] 0 Preliminary [1] [0] CCIR_OUT_X CCIR_OUT_Y CCIR_601 Define the digital data output format. 0 1 ITU-R BT.656 mode (default) ITU-R BT.601 mode CCIR_601_INV Swap Y/C output port when CCIR_601 = 1 0 VDOX : Y output, VDOY : C output (default) 1 VDOX : C output, VDOY : Y output CCIR_OUT Define the mode of ITU-R BT.656 digital output. The default value is "0" for CCIR_OUT_X, but "1" for CCIR_OUT_Y. When ITU-R BT.656 is selected (CCIR_601 = 0) 0 Display path video data with single output mode (27MHz) 1 Record path video data with single output mode (27MHz) 2 Display and Record path video data with dual output mode (54MHz) 3 Record and Display path video data with dual output mode (54MHz) When ITU-R BT.601 is selected (CCIR_601 = 1) 0 Display path video data with single output mode (13.5MHz) 1 Record path video data with single output mode (13.5MHz) 2 Dual output mode with Display and Record path video data (27MHz) 3 Dual output mode with Record and Display path video data (27MHz) Techwell, Inc. www.techwellinc.com 217 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1xA4 [7] ENC_ MODE [6] CCIR_LMT [5] ENC_VS [4] ENC_FLD [3] CCIR_ FLDPOL [2] ENC_ HSPOL Preliminary [1] ENC_ VSPOL [0] ENC_ FLDPOL ENC_MODE Define the operation mode of video encoder. 0 1 Slave operation mode (default) Master operation mode CCIR_LMT Control the data range of ITU-R BT 656 output. 0 Not limited (default) 1 Data range is limited to 1 ~ 254 code ENC_VS Define the vertical sync detection type. 0 Detect vertical sync from VSENC pin (default) 1 Detect vertical sync from combination of HSENC and FLDEN pins ENC_FLD Define the field polarity detection type 0 Detect field polarity from FLDENC pin (default) 1 Detect field polarity from combination of HSENC and VSENC pins Control the field polarity of ITU-R BT 656 output. 0 High for even field (default) 1 High for odd field Control the horizontal sync polarity. 0 Active low (default) 1 Active high Control the vertical sync polarity. 0 1 Active low (default) Active high CCIR_FLDPOL ENC_HSPOL ENC_VSPOL ENC_FLDPOL Control the field polarity. 0 Even field is high (default) 1 Odd field is high Techwell, Inc. www.techwellinc.com 218 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1xA5 [7] [6] [5] [4] [3] [2] ENC_VSOFF ENC_VSDEL Preliminary [1] [0] ENC_VSOFF Compensate the field offset for first active video line. 0 Apply same ENC_VSDEL for odd and even field (default) 1 Apply {ENC_VSDEL+1} for odd and ENC_VSDEL for even field 2 3 Apply ENC_VSDEL for odd and {ENC_VSDEL +1} for even field Apply ENC_VSDEL for odd and {ENC_VSDEL +2} for even field ENC_VSDEL Control the line delay of vertical sync from active video by 1 line/step. 0 No delayed : : 32 32 line delay (default) : : Table 1 63 line delay Index 1xA6 1xA7 [7] [6] [5] 0 [4] [3] [2] ACTIVE_VDEL [1] [0] ENC_HSDEL[9:2] ENC_HSDEL[1:0] ENC_HSDEL Control the pixel delay of horizontal sync from active video by 1/2 pixel/step. 0 No delayed : : 128 64 pixel delay (default) : : 1023 255 pixel delay ACTIVE_VDEL Control the line delay of active video by 1 line/step. 0 - 11 Lines delayed : : 12 0 Line delayed (default) : : Table 1 + 13 Lines delayed Techwell, Inc. www.techwellinc.com 219 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1xA8 1xA9 [7] [6] [5] [4] [3] [2] ENC_ PHALT ACTIVE_MD CCIR_STD ENC_FSC 0 0 ACTIVE_HDEL 1 Preliminary [1] ENC_ ALTRST [0] ENC_ PED ACTIVE_MD Select the active delay mode for digital BT. 656 output 0 Control the active delay for both analog encoder and digital output (default) 1 Control the active delay for only analog encoder CCIR_STD Select the ITU-R BT656 standard format for 60Hz system. 0 240 line for odd and even field (default) 1 244 line for odd and 243 line for even field (ITU-R BT.656 standard) Control the pixel delay of active video by 1 pixel/step. 0 - 32 Pixel delay : : 32 0 Pixel delay (default) : : 63 + 31 Pixel delay ACTIVE_HDEL ENC_FSC Set color sub-carrier frequency for video encoder. 0 3.57954545 MHz (default) 1 2 3 4.43361875 MHz 3.57561149 MHz 3.58205625 MHz ENC_PHALT Set the phase alternation. 0 Disable phase alternation for line-by-line (default) 1 Enable phase alternation for line-by-line Reset the phase alternation every 8 field 0 1 No reset mode (default) Reset the phase alternation every 8 field ENC_ALTRST ENC_PED Set 7.5IRE for pedestal level 0 0 IRE for pedestal level 1 7.5 IRE for pedestal level (default) Techwell, Inc. www.techwellinc.com 220 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1xAA [7] [6] [5] [4] [3] [2] ENC_CBW_X ENC_YBW_X ENC_CBW_Y Preliminary [1] [0] ENC_YBW_Y ENC_CBW Control the chrominance bandwidth of video encoder. 0 0.8 MHz 1 1.15 MHz 2 3 1.35 MHz (default) 1.35 MHz ENC_YBW Control the luminance bandwidth of video encoder. 0 Narrow bandwidth 1 2 3 Narrower bandwidth Wide bandwidth (default) Middle band width Index 1xAB [7] 0 [6] HOUT* [5] VOUT* [4] FOUT* [3] ENC_ BAR_X [2] ENC_ CKILL_X [1] ENC_ BAR_Y [0] ENC_ CKILL_Y Notes "*" stand for read only register HOUT VOUT FOUT ENC_BAR Status of horizontal sync for encoder timing Status of vertical sync for encoder timing Status of field polarity for encoder timing Enable the test pattern output. 0 Normal operation (default) 1 Internal color bar with 100% amplitude 100 % saturation Enable the color killing function 0 Normal operation (default) 1 Color is killed ENC_CKILL Techwell, Inc. www.techwellinc.com 221 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1xAC 1xAD 1xAE 1xAF [7] [6] [5] [4] [3] [2] ENC_CLK_FR_X ENC_CLK_FR_Y DEC_CLK_FR_X DEC_CLK_FR_Y ENC_CLK_PH_X ENC_CLK_PH_Y DEC_CLK_PH_X DEC_CLK_PH_Y Preliminary [1] [0] ENC_CLKDEL_X ENC_CLKDEL_Y DEC_CLKDEL_X DEC_CLKDEL_Y ENC_CLK_FR_X ENC_CLK_FR_Y DEC_CLK_FR_X DEC_CLK_FR_Y Control the clock frequency of CLKVDOX pin (default = 1, 27MHz) Control the clock frequency of CLKVDOY pin (default = 1, 27MHz) Control the clock frequency of CLKMPP1 pin (default = 2, 27MHz) Control the clock frequency of CLKMPP2 pin (default = 0, 54MHz) 0 54MHz 1 27MHz for Memory Controlled Digital Output 2 3 27MHz for Decoder Bypassed Digital Output 13.5MHz for Memory Controlled Digital Output ENC_CLK_PH_X ENC_CLK_PH_Y DEC_CLK_PH_X DEC_CLK_PH_Y Control the clock phase of CLKVDOX pin (default = 0, 0 degree) Control the clock phase of CLKVDOY pin (default = 2, 180 degree) Control the clock phase of CLKMPP1 pin (default = 0, 0 degree) Control the clock phase of CLKMPP2 pin (default = 0, 0 degree) 0 None operation 1 None operation when clock frequency is not 13.5MHz 2 3 90 degree shift when clock frequency is 13.5MHz 180 degree Phase Inverting 180 degree Phase Inverting when clock frequency is not 13.5MHz 270 degree shift when clock frequency is 13.5MHz ENC_CLKDEL_X ENC_CLKDEL_Y DEC_CLKDEL_X DEC_CLKDEL_Y Control the clock delay of CLKVDOX pin Control the clock delay of CLKVDOY pin Control the clock delay of CLKMPP1 pin Control the clock delay of CLKMPP2 pin The delay can be controlled by 1ns. The default value is 0. Techwell, Inc. www.techwellinc.com 222 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 1xB0 1xB1 1xB2 1xB3 1xB4 1xB5 1xB6 [7] 0 [6] 0 MPPSET0_MSB MPPDATA0_MSB MPPSET1_MSB MPPDATA1_MSB MPPSET2_ MSB MPPDATA2_ MSB [5] MPPOUT2 [4] [3] MPPOUT1 MPPSET0_LSB [2] Preliminary [1] MPPOUT0 [0] MPPDATA0_ LSB MPPSET1_ LSB MPPDATA1_ LSB MPPSET2_ LSB MPPDATA2_ LSB MPPOUT2 MPPOUT1 MPPOUT0 Select the MPP2 pin function (default= 0) Select the MPP1 pin function (default= 0) Select the DLINKI pin function (default= 0) In cascaded mode, DLINKI pin is reserved for cascaded operation 0 1 2 Multi purpose output mode 1 (default) GPPIO mode Multi purpose output mode 2 MPPSET_MSB MPPSET_LSB Select the function for MPP [7:4] pins in Multi purpose output Mod 1 Select I/O for each bit for MPP [7:4] pins in GPPIO Mode Select the function for MPP [7:4] pins in Multi purpose output Mod 2 (default= 0) Select the function for MPP [3:0] pins in Multi purpose output Mod 1 Select I/O for each bit for MPP [3:0] pins in GPPIO Mode Select the function for MPP [3:0] pins in Multi purpose output Mod 2 (default= 0) The detailed description for each mode is shown in following table MPPDATA_MSB MPPDATA_LSB In writing mode, the data is for MPP [7:4] in GPPIO mode In reading mode, the data stands for MPP [7:4] pin status (default= 0) In writing mode, the data is for MPP [3:0] in GPPIO mode In reading mode, the data stands for MPP [3:0] pin status (default= 0) Techwell, Inc. www.techwellinc.com 223 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller MPP_MD MPP_SET 0 1 2 3 4 5-7 8 9 - 13 14 15 0 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 I/O In MPP_DATA Input Data from Pin STROBE_DET_C CHID_MUX[3:0] CHID_MUX[7:4] MUX_OUT_DET[15:12] STROBE_DET_D {1'b0, H, V, F} {hsync, vsync, field, link} Write Data to Pin Input Data from Pin Decoder H Sync Decoder V Sync Decoder Field Sync Decoder Ch 0/1 [7:4] Decoder Ch 0/1 [3:0] Decoder Ch 2/3 [7:4] Decoder Ch 2/3 [3:0] NOVID_DET_M MD_DET_M BD_DET_M ND_DET_M NOVID_DET_S MD_DET_S BD_DET_S ND_DET_S Default Preliminary Remark Capture path Reserved Display Path Reserved BT. 656 Sync Analog Encoder Sync GPP I/O Mode Bit[3:0] : VIN3 ~ VIN0 MSB for Ch 0/1 LSB for Ch 0/1 MSB for Ch 2/3 LSB for Ch 2/3 Reserved For VINA (ANA_SW = 0) 0 Out 1 Out In 2 Out For VINB (ANA_SW = 1) Index 1xB7 1xB8 1xB9 1xBA 1xBB 1xBC 1xBD 1xBE 1xBF [7] [6] [5] [4] 00 00 00 00 00 00 00 00 00 [3] [2] [1] [0] This is reserved register. For normal operation, the above value should be set in this register. Techwell, Inc. www.techwellinc.com 224 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 2x00 2x01 2x02 2x03 2x04 OSD_BUF_ WR OSD_BUF_ RD 0 [7] [6] [5] [4] [3] [2] OSD_BUF_DATA[31:24] OSD_BUF_DATA[23:16] OSD_BUF_DATA[15:8] OSD_BUF_DATA[7:0] Preliminary [1] [0] OSD_BUF_ADDR OSD_BUF_DATA Define the writing data of OSD buffer (Internal Buffer Size = 32Bit x 16) in normal single writing mode Define the OSD acceleration data in acceleration downloading mode (default = 0) [31:24] is left top font from 4 OSD dot in display path [31:28] is left top font from 8 OSD dot in capture path Read mode depends on OSD_BUF_RD 0 Read the buffer data with OSD_BUF_ADDR (default) 1 Read the OSD acceleration downloading data OSD_BUF_WR Request to write the OSD internal buffer This bit is cleared automatically after downloading is finished 0 Disable the writing or Writing is finished (default) 1 Enable the writing OSD_BUF_ADDR Select the OSD internal buffer address to read/write 0 internal buffer address (default) : Table 1 15 internal buffer address 0 : Techwell, Inc. www.techwellinc.com 225 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 2x05 2x06 2x07 2x08 2x09 [7] [6] [5] [4] [3] [2] OSD_START_HPOS OSD_END_HPOS OSD_START_VPOS[7:0] OSD_END_VPOS[7:0] OSD_START_VPOS[9:8] Preliminary [1] [0] OSD_END_VPOS[9:8] OSD_START_HPOS Define the horizontal starting position in normal single writing mode Define the horizontal starting position in acceleration downloading mode For display path, 4 pixel per unit 0 1 pixel (default) : : 179 716 pixel For record path, 8 pixel per unit 1 pixel : Table 1 712 pixel OSD_END_HPOS Define the horizontal end position in acceleration wiring mode (default = 0) Same unit as the OSD_START_HPOS OSD_START_VPOS Define the vertical starting position in normal single writing mode Define the vertical starting position in acceleration downloading mode Bit [9] stands for writing field 0 Odd field (default) 1 Even field Bit [8:0] stands for writing line number 0 1 Line (default) : : 239 240 Line for 60Hz system : : Table 1 288 Line for 50Hz system OSD_END_VPOS Define the vertical end position in acceleration downloading mode (default = 0) The unit is same as the OSD_START_VPOS 0 : Techwell, Inc. www.techwellinc.com 226 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 2x09 2x0A [7] [6] [5] [4] [3] [2] BUF_WR_SIZE OSD_MEM_ OSD_ACC_ OSD_MEM_ WR EN PATH OSD_PAGE_D 0 Preliminary [1] [0] INDEX_RD_ MD BUF_WR_SIZE Define the buffer downloading size in normal single writing mode 0 32 Bit X 1 (default) : : Table 1 32 Bit X 16 OSD_MEM_WR Enable to write the OSD into memory. This bit is cleared automatically after downloading is finished 0 Disable the writing or Writing is finished (default) 1 Enable the writing OSD_ACC_EN Select the OSD writing mode 0 Normal single writing mode using internal buffer (default) 1 Acceleration downloading mode Select the OSD writing Path 0 Display path (default) 1 Record path Select OSD writing page for display path 0 Page = 0 (default) : : Table 1 Page = 5 6/7 Not allowed OSD_MEM_PATH OSD_WR_PAGE Techwell, Inc. www.techwellinc.com 227 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 2x0B 2x0C 2x0D 2x0E OSD_INDEX _WR [7] [6] [5] [4] [3] [2] OSD_INDEX_Y OSD_INDEX_CB OSD_INDEX_CR OSD_INDEX_ADDR Preliminary [1] [0] OSD_INDEX_Y OSD_INDEX_CB OSD_INDEX_CR OSD_INDEX_WR Y component for Color Look-Up Table (default = 0) Cb component for Color Look-Up Table (default = 0) Cr component for Color Look-Up Table (default = 0) Request to write the Color Look-Up Table This register is cleared automatically after downloading is finished 0 Disable the writing or Writing is finished (default) 1 Enable the Writing OSD_INDEX_ADDR Define the OSD index address for Color Look-Up Table 0 0 index of LUT for display path (default) : : 63 64 : 67 6863 index of LUT for display path 0 index of LUT for capture path : 3 index of LUT for capture path Not allowed Index 2x0F [7] 0 [6] [5] OSD_RD_PAGE_X [4] [3] [2] [1] [0] OSD_FLD_X OSD_FLD_Y OSD_RD_PAGE_X Select the OSD reading page for display path 0 Page = 0 (default) : : Table 1 Page = 5 6/7 Not allowed OSD_FLD Enable the bitmap overlay 0 Disable the bitmap overlay (default) 1 Enable the bitmap overlay with even field display RAM 2 3 Enable the bitmap overlay with odd field display RAM Enable the bitmap overlay with both odd and even field display RAM Techwell, Inc. www.techwellinc.com 228 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 2x10 2x11 2x12 [7] CUR_ ON_X [6] CUR_ ON_Y [5] CUR_ TYPE [4] CUR_ SUB [3] CUR_ BLINK [2] 0 Preliminary [1] CUR_HP[0] [0] CUR_VP[0] CUR_HP[8:1] CUR_VP[8:1] CUR_ON Enable the mouse pointer. 0 1 Disable mouse pointer (default) Enable mouse pointer CUR_TYPE Select the mouse type 0 Small mouse pointer (default) 1 Large mouse pointer CUR_SUB Control inside style of mouse pointer. 0 Transparent (default) 1 Filled with white color Enable blink of mouse pointer. 0 Disable blink (default) 1 Enable blink with 0.5 second period Control the horizontal location of mouse pointer. 0 0 Pixel position (default) : : 360 720 Pixel position Control the vertical location of mouse pointer. 0 0 Line position (default) : : Table 1 288 Line position CUR_BLINK CUR_HP CUR_VP Techwell, Inc. www.techwellinc.com 229 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 2x13 2x14 2x15 2x16 2x17 2x18 2x19 2x1A 2x1B 2x1C 2x1D 2x1E [7] [6] [5] [4] CLUT0_Y CLUT0_CB CLUT0_CR CLUT1_Y CLUT1_CB CLUT1_CR CLUT2_Y CLUT2_CB CLUT2_CR CLUT3_Y CLUT3_CB CLUT3_CR [3] [2] Preliminary [1] [0] CLUT0_Y CLUT0_CB CLUT0_CR CLUT1_Y CLUT1_CB CLUT1_CR CLUT2_Y CLUT2_CB CLUT2_CR CLUT3_Y CLUT3_CB CLUT3_CR Y component for user defined color 0 (default : 0) Cb component for user defined color 0 (default : 0) Cr component for user defined color 0 (default : 0) Y component for user defined color 1 (default : 0) Cb component for user defined color 1 (default : 0) Cr component for user defined color 1 (default : 0) Y component for user defined color 2 (default : 0) Cb component for user defined color 2 (default : 0) Cr component for user defined color 2 (default : 0) Y component for user defined color 3 (default : 0) Cb component for user defined color 3 (default : 0) Cr component for user defined color 3 (default : 0) Techwell, Inc. www.techwellinc.com 230 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Index 2x1F [7] [6] [5] [4] [3] [2] TBLINK_OSD ALPHA_OSD ALPHA_2DBOX Preliminary [1] [0] ALPHA_BOX TBLINK_OSD Select the blink time for bitmap overlay 0 0.25 sec (default) 1 0.5 sec 2 3 1 sec 2 sec ALPHA_OSD Select the alpha blending mode for bitmap overlay 0 50% (default) 1 2 3 50% 75% 25% ALPHA_2DBOX Select the alpha blending mode for 2D arrayed Box 0 50% (default) 1 50% 2 75% 3 25% Select the alpha blending mode for Single Box 0 50% (default) 1 50% 2 75% 3 25% ALPHA_BOX Techwell, Inc. www.techwellinc.com 231 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Box B0 B1 B2 B3 Index 2x20 2x26 2x2B 2x32 BOX_BND_COL BOX_ BOX_ PLNMIX_Y BNDEN_Y BOX_ PLNEN_Y BOX_ PLNMIX_X [7] [6] [5] [4] [3] [2] Preliminary [1] BOX_ BNDEN_X [0] BOX_ PLNEN_X BOX_BND_COL Define the box boundary color for each box 0 1 2 3 0% White (Default) 25% White 50% White 75% White BOX_PLNMIX_Y Enable the alpha blending for box plane area in record path 0 No alpha blending (Default) 1 Enable alpha blending Enable the box boundary in record path 0 Disable (Default) 1 Enable Enable the box plane area in record path 0 1 Disable (Default) Enable BOX_BNDEN_Y BOX_PLNEN_Y BOX_PLNMIX_X Enable the alpha blending of box plane area in display path 0 No alpha blending (Default) 1 Enable alpha blending BOX_BNDEN_X Enable the box boundary in display path 0 Disable (Default) 1 Enable Enable the box plane area in display path 0 Disable (Default) 1 Enable BOX_PLNEN_X Techwell, Inc. www.techwellinc.com 232 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Box B0 B1 B2 B3 Index 2x21 2x27 2x2C 2x33 BOX_PLNCOL [7] [6] [5] [4] [3] [2] Preliminary [1] [0] BOX_PLNCOL Define the box plane color for each box 0 1 2 3 4 5 6 7 8 9 10 11 12 13 White (75% Amplitude 100% Saturation) (default) Yellow (75% Amplitude 100% Saturation) Cyan (75 % Amplitude 100 Saturation) Green (75% Amplitude 100% Saturation) Magenta (75% Amplitude 100% Saturation) Red (75% Amplitude 100% Saturation) Blue (75% Amplitude 100% Saturation) 0% Black 100% White 50% Gray 25% Gray Blue (75% Amplitude 75% Saturation) Defined by CLUT0 Defined by CLUT1 14 Defined by CLUT2 15 Defined by CLUT3 Techwell, Inc. www.techwellinc.com 233 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Box B0 B1 B2 B3 B0 B1 B2 B3 Index 2x21 2x27 2x2C 2x33 2x22 2x28 2x2D 2x34 BOXHL[8:1] BOXHL[0] [7] [6] [5] [4] [3] [2] Preliminary [1] [0] BOX_HL Define the horizontal left location of box. Left end (default) : Table 1 Right end 0 : Box B0 B1 B2 B3 B0 B1 B2 B3 Index 2x21 2x27 2x2C 2x33 2x23 2x29 2x2E 2x35 [7] [6] [5] [4] [3] [2] [1] [0] BOXHW[0] BOXHW[8:1] BOX_HW Define the horizontal size of box. 0 0 Pixel width (default) : : Table 1 720 Pixels width Techwell, Inc. www.techwellinc.com 234 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Box B0 B1 B2 B3 B0 B1 B2 B3 Index 2x21 2x27 2x2C 2x33 2x24 2x2A 2x2F 2x36 BOXVT[8:1] [7] [6] [5] [4] [3] [2] Preliminary [1] [0] BOXVT[0] BOX_VT Define the vertical top location of box. Vertical top (default) : Table 1 Vertical bottom 0 : Box B0 B1 B2 B3 B0 B1 B2 B3 Index 2x21 2x27 2x2C 2x33 2x25 2x2B 2x30 2x37 [7] [6] [5] [4] [3] [2] [1] [0] BOXVW[0] BOXVW[8:1] BOX_VW Define the vertical size of box. 0 0 Lines height (default) : : Table 1 288 Lines height Index 2x38 [7] 0 [6] [5] 0 [4] [3] [2] [1] [0] OSD_OVL_MD_D OSD_OVL_MD_C OSD_OVL_MD Control the OSD overlay mode for each path 0 No overlay (default) 1 Enable overlay with high priority 2 Enable overlay with low priority 3 Enable overlay with no priority Techwell, Inc. www.techwellinc.com 235 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller 2DBox 2DB0 2DB1 2DB2 2DB3 Index 2x5B 2x5C 2x5D 2x5E MDBND3_COL MDBND2_COL MDBND1_COL MDAREA_COL [7] [6] [5] [4] [3] [2] Preliminary [1] [0] DETAREA_COL 2x5F MDBND0_COL MDAREA_COL DETAREA_COL Define the color of Mask plane in 2D arrayed box. (default = 0) Define the color of Detection plane in 2D arrayed box. (default = 0) 0 White (75% Amplitude 100% Saturation) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Yellow (75% Amplitude 100% Saturation) Cyan (75 % Amplitude 100 Saturation) Green (75% Amplitude 100% Saturation) Magenta (75% Amplitude 100% Saturation) Red (75% Amplitude 100% Saturation) Blue (75% Amplitude 100% Saturation) 0% Black 100% White 50% Gray 25% Gray Blue (75% Amplitude 75% Saturation) Defined by CLUT0 Defined by CLUT1 Defined by CLUT2 Defined by CLUT3 MDBND_COL Define the color of 2D arrayed box boundary 0 0 % Black (default) 1 25% Gray 2 50% Gray 3 75% White Define the displayed color for cursor cell and motion-detected region 0,1 75% White (default) 2,3 0% Black Techwell, Inc. www.techwellinc.com 236 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller 2Dbox 2DB0 2DB1 2DB2 2DB3 Index 2x60 2x68 2x70 2x78 2DBOX _EN_X 2DBOX _EN_Y 2DBOX _MODE 2DBOX_ CUREN 2DBOX _MIX [7] [6] [5] [4] [3] [2] Preliminary [1] [0] 2DBOX_IN_SEL 2DBOX_EN Enable the 2Dbox 0 1 Disable the 2D box (default) Enable the 2D box 2DBOX_MODE Define the operation mode of 2D arrayed box. 0 Table mode (default) 1 Motion display mode 2DBOX_CUREN Enable the cursor cell inside 2D arrayed box. 0 Disable the cursor cell (default) 1 Enable the cursor cell 2DBOX_MIX Enable the alpha blending for 2D arrayed box plane with video data. 0 Disable the alpha blending (default) 1 Enable the alpha blending with ALPHA_2DBOX setting (2x03) Select the input for Mask / Detection data of 2D Box. 0 Mask and Detection Data for VIN 0 and ANA_SW = 0 (default) 1 Mask and Detection Data for VIN1 and ANA_SW = 0 2 Mask and Detection Data for VIN 2 and ANA_SW = 0 3 4 5 6 7 Mask and Detection Data for VIN 3 and ANA_SW = 0 Mask and Detection Data for VIN 0 and ANA_SW = 1 Mask and Detection Data for VIN1 and ANA_SW = 1 Mask and Detection Data for VIN 2 and ANA_SW = 1 Mask and Detection Data for VIN 3 and ANA_SW = 1 2DBOX_IN_SEL Techwell, Inc. www.techwellinc.com 237 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller 2Dbox 2DB0 2DB1 2DB2 2DB3 Index 2x61 2x69 2x71 2x79 2DBOX_ HINV 2DBOX_ VINV 2DBOX_ MSKEN 2DBOX_ DETEN 2DBOX_ BNDEN 0 [7] [6] [5] [4] [3] [2] Preliminary [1] [0] 2DBOX_HINV Enable the horizontal mirroring for 2D arrayed box. 0 1 Normal operation (default) Enable the horizontal mirroring 2DBOX_VINV Enable the vertical mirroring for 2D arrayed box. 0 Normal operation (default) 1 Enable the vertical mirroring 2DBOX_DETEN Enable the detection plane of 2D arrayed box. When 2DBOX_MODE = "0" 0 1 Disable the detection plane of 2D arrayed box (default) Enable the detection plane of 2D arrayed box When 2DBOX_MODE = "1" 0 Display the motion detection result with inner boundary 1 2DBOX_MSKEN Display the motion detection result with plane Enable the mask plane of 2D arrayed box. 0 Disable the mask plane of 2D arrayed box (default) 1 Enable the mask plane of 2D arrayed box Enable the boundary of 2D arrayed box. 0 Disable the boundary (default) 1 Enable the boundary 2DBOX_BNDEN Techwell, Inc. www.techwellinc.com 238 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller 2Dbox 2DB0 2DB1 2DB2 2DB3 2DB0 2DB1 2DB2 2DB3 Index 2x61 2x69 2x71 2x79 2x62 2x6A 2x72 2x7A 2DBOX_HL[8:1] [7] [6] [5] [4] [3] [2] Preliminary [1] 2DBOX_ HL[0] [0] 2DBOX_HL Define the horizontal left location of 2D arrayed box. Horizontal left end (default) : Table 1 Horizontal right end 0 : 2Dbox 2DB0 2DB1 2DB2 2DB3 Index 2x63 2x6B 2x73 2x7B [7] [6] [5] [4] [3] [2] [1] [0] 2DBOX_HW 2DBOX_HW Define the horizontal size of 2D arrayed box. 0 0 Pixel width (default) : : Table 1 510 Pixels width Techwell, Inc. www.techwellinc.com 239 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller 2Dbox 2DB0 2DB1 2DB2 2DB3 2DB0 2DB1 2DB2 2DB3 Index 2x61 2x69 2x71 2x79 2x64 2x6C 2x74 2x7C 2DBOX_VT[8:1] [7] [6] [5] [4] [3] [2] Preliminary [1] [0] 2DBOX_ VT[0] 2DBOX_VT Define the vertical top location of 2D arrayed box. Vertical top end (default) : Vertical bottom end for 60Hz system : Table 1 Vertical bottom end for 50Hz system 0 : 240 : 2Dbox 2DB0 2DB1 2DB2 2DB3 Index 2x65 2x6D 2x75 2x7D [7] [6] [5] [4] [3] [2] [1] [0] 2DBOX_VW 2DBOX_VW Define the vertical size of 2D arrayed box. 0 Line height (default) : Table 1 255 Line height 0 : Techwell, Inc. www.techwellinc.com 240 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller 2Dbox 2DB0 2DB1 2DB2 2DB3 Index 2x66 2x6E 2x76 2x7E 2DBOX_HNUM [7] [6] [5] [4] [3] [2] Preliminary [1] [0] 2DBOX_VNUM 2DBOX_VNUM Define the row number of 2D arrayed box. For motion display mode, 11 is recommended. 0 1 Row : : 11 12 Row (default) : : Table 1 16 Rows 2DBOX_HNUM Define the column number of 2D arrayed box. For motion display mode, 15 is recommended. 1 Column : Table 1 16 Columns (default) 0 : 2Dbox 2DB0 2DB1 2DB2 2DB3 Index 2x67 2x6F 2x77 2x7F [7] [6] [5] [4] [3] [2] [1] [0] 2DBOX_CURHP 2DBOX_CURVP 2DBOX_CURHP Define the horizontal location of cursor cell within 2DBOX_HNUM. 0 1st Column (default) : : th Table 1 16 Column Define the vertical location of cursor cell within 2DBOX_VNUM. 0 1st Row (default) : : Table 1 16 Row th 2DBOX_CURVP Techwell, Inc. www.techwellinc.com 241 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN 0 1 2 3 0 1 2 3 Index 2x80 2xA0 2xC0 2xE0 2x81 2xA1 2xC1 2xE1 ND_LVSENS MD_DIS MD _REFFLD BD_CELSENS [7] [6] [5] [4] [3] [2] Preliminary [1] [0] BD_LVSENS ND_TMPSENS MD_DIS Disable the motion and blind detection. 0 1 Enable motion and blind detection (default) Disable motion and blind detection MD_REFFLD Control the updating time of reference field for motion detection. 0 Update reference field every field (default) 1 Update reference field according to MD_SPEED BD_CELSENS Define the threshold of cell for blind detection. 0 Low threshold (More sensitive) (default) : : 3 High threshold (Less sensitive) BD_LVSENS Define the threshold of level for blind detection. 0 Low threshold (More sensitive) (default) : : 15 High threshold (Less sensitive) ND_LVSENS Define the threshold of level for night detection. 0 Low threshold (More sensitive) (default) : : 3 High threshold (Less sensitive) ND_TMPSENS Define the threshold of temporal sensitivity for night detection. 0 Low threshold (More sensitive) (default) : : Table 1 High threshold (Less sensitive) Techwell, Inc. www.techwellinc.com 242 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN 0 1 2 3 0 1 2 3 Index 2x82 2xA2 2xC2 2xE2 2x83 2xA3 2xC3 2xE3 MD_CELSENS MD_DUAL _EN MD_LVSENS MD_MASK_ RD_MD MD_FLD MD_ALGIN [7] [6] [5] [4] [3] [2] Preliminary [1] [0] MD_MASK_RD_MD Select the read mode of MD_MASK register 0 Read motion detection information when ANA_SW = 0 1 Read motion detection information when ANA_SW = 1 2/3 Read the mask information MD_FLD Select the field for motion detection. 0 1 2 3 MD_ALGIN Detecting motion for only odd field (default) Detecting motion for only even field Detecting motion for any field Detecting motion for both odd and even field Adjust the horizontal starting position for motion detection. 0 0 pixel (default) : : 15 15 pixels Define the threshold of sub-cell number for motion detection. 0 Motion is detected if 1 sub-cell has motion (More sensitive) (default) 1 Motion is detected if 2 sub-cells have motion 2 Motion is detected if 3 sub-cells have motion 3 Motion is detected if 4 sub-cells have motion (Less sensitive) Enable the non-realtime motion detection mode 0 Normal 4 channel motion detection mode (default) 1 8 channel detection mode for non-realtime application Control the level sensitivity of motion detector. 0 More sensitive (default) : : Table 1 Less sensitive MD_CELSENS MD_DUAL_EN MD_LVSENS Techwell, Inc. www.techwellinc.com 243 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN 0 1 2 3 0 1 2 3 Index 2x84 2xA4 2xC4 2xE4 2x85 2xA5 2xC5 2xE5 MD_TMPSENS MD_ STRB_EN MD_STRB MD_SPEED [7] [6] [5] [4] [3] [2] Preliminary [1] [0] MD_SPSENS MD_STRB_EN Select the trigger mode of motion detection 0 1 Automatic trigger mode of motion detection (default) Manual trigger mode for motion detection MD_STRB Request to start motion detection on manual trigger mode 0 None Operation (default) 1 Request to start motion detection MD_SPEED Control the velocity of motion detector. Large value is suitable for slow motion detection. In MD_DUAL_EN = 1, MD_SPEED should be limited to 0 ~ 31. 0 1 : 61 62 1 field intervals (default) 2 field intervals : 62 field intervals 63 field intervals 63 Not supported MD_TMPSENS Control the temporal sensitivity of motion detector. 0 More Sensitive (default) : : 15 Less Sensitive MD_SPSENS Control the spatial sensitivity of motion detector. 0 More Sensitive (default) : : Table 1 Less Sensitive Techwell, Inc. www.techwellinc.com 244 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Row 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 Index Preliminary Motion Detection Mask Control for VIN VIN0 2x86 2x88 2x8A 2x8C 2x8E 2x90 2x92 2x94 2x96 2x98 2x9A 2x9C 2x87 2x89 2x8B 2x8D 2x8F 2x91 2x93 2x95 2x97 2x99 2x9B 2x9D VIN1 2xA6 2xA8 2xAA 2xAC 2xAE 2xB0 2xB2 2xB4 2xB6 2xB8 2xBA 2xBC 2xA7 2xA9 2xAB 2xAD 2xAF 2xB1 2xB3 2xB5 2xB7 2xB9 2xBB 2xBD VIN2 2xC6 2xC8 2xCA 2xCC 2xCE 2xD0 2xD2 2xD4 2xD6 2xD8 2xDA 2xDC 2xC7 2xC9 2xCB 2xCD 2xCF 2xD1 2xD3 2xD5 2xD7 2xD9 2xDB 2xDD VIN3 2xE6 2xE8 2xEA 2xEC 2xEE 2xF0 2xF2 2xF4 2xF6 2xF8 2xFA 2xFC 2xE7 2xE9 2xEB 2xED 2xEF 2xF1 2xF3 2xF5 2xF7 2xF9 2xFB 2xFD [7] [6] [5] [4] [3] [2] [1] [0] MD_MASK[15:8] MD_MASK[7:0] MD_MASK Define the motion Mask/Detection cell for VIN MD_MASK[15] is right end and MD_MASK[0] is left end of column. In writing mode 0 1 Non-masking cell for motion detection (default) Masking cell for motion detection In reading mode when MASK_MODE = "0" 0 Motion is not detected for cell 1 Motion is detected for cell In reading mode when MASK_MODE = "1" 0 Non-masked cell 1 Masked cell Techwell, Inc. www.techwellinc.com 245 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller VIN 0 1 2 3 Index 2x9E 2xBE 2xDE 2xFE DET_RESULT_S* [7] [6] [5] [4] [3] [2] Preliminary [1] [0] DET_RESULT_M* Notes "*" stand for read only register DET_RESULT_S DET_RESULT_M Detection result for Video Input with ANA_SW = 1 Detection result for Video Input with ANA_SW = 0 Bit[3] stand for video loss detection result Bit[2] stand for motion detection result Bit[1] stand for blind detection result Bit[0] stand for night detection result 0 Video Enable / No Motion / No Blind / Day 1 Video Loss/ Motion / Blind / Night Techwell, Inc. www.techwellinc.com 246 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Parametric Information DC Electrical Parameters Table 14 Absolute Maximum Ratings Symbol Min Typ VDDADCM VDDDACM VDDIM VDDOM -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 TS TJ TVSOL -65 0 Preliminary Parameter Max 2.3 2.3 2.3 4.5 4.5 2.0 150 125 220 Units V V V V V V C C C VDDADC (measured to VSSADC) VDDDAC (measured to VSSDAC) VDDI (measured to VSSI) VDDO (measured to VSSO) Voltage on Any Digital Data Pin (See the note below) Analog Input Voltage for ADC Storage Temperature Junction Temperature Vapor Phase Soldering (15 Seconds) NOTE: Long-term exposure to absolute maximum ratings may affect device reliability, and permanent damage may occur if operate exceeding the rating. The device should be operated under recommended operating condition. Table 15 Recommended Operating Conditions Parameter Symbol Min Typ VDDADC (measured to VSSADC) VDDDAC (measured to VSSDAC) VDDI (measured to VSSI) VDDO (measured to VSSO) Analog VIN Amplitude Range (AC coupling required) Analog AIN Amplitude Range (AC coupling required) Ambient Operating Temperature VDDADC VDDDAC VDDI VDDO VINR AINR TA 1.62 1.62 1.62 3.0 0 0 -40 1.8 1.8 1.8 3.3 0.5 0.5 Max 1.98 1.98 1.98 3.6 1.0 1.0 70 Units V V V V V V C Techwell, Inc. www.techwellinc.com 247 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Parameter Digital Inputs Input High Voltage (TTL) Input Low Voltage (TTL) Input Leakage Current (@VI=2.5V or 0V) Input Capacitance Digital Outputs Output High Voltage Output Low Voltage High Level Output Current (@VOH=2.4V) Low Level Output Current (@VOL=0.4V) Tri-state Output Leakage Current (@VO=2.5V or 0V) Output Capacitance Analog Pin Input Capacitance VOH VOL IOH IOL IOZ CO CA 6 6 6.3 4.9 12.8 7.4 2.4 VIH VIL IL CIN 6 2.0 -0.3 Preliminary Typ Max 5.5 0.8 10 Table 16 DC Characteristics Symbol Min Units V V A pF V 0.4 21.2 9.8 10 V mA mA A pF pF Table 17 Supply Current and Power Dissipation Parameter Symbol Min Typ Analog Supply Current (1.8V) Digital Internal Supply Current (1.8V) Digital I/O Supply Current (3.3V) Total Power Dissipation IDDA IDDI IDDO Pd 150 460 25 1.18 Max 165 505 27 1.29 Units mA mA mA W Techwell, Inc. www.techwellinc.com 248 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller AC Electrical Parameters Parameter Table 18 Clock Timing Parameters Symbol Min Typ 1 2a 2b 3a 3b 4a 4b 4.7 17 8 Preliminary Max 12.5 21 12 Units ns ns ns ns ns ns ns Delay from CLK54I to CLKVDO Hold from CLKVDO (27MHz) to Data Delay from CLKVDO (27MHz) to Data Hold from CLK54I to Data Delay from CLK54I to Data Setup from PBIN to PBCLK Hold from PBCLK to PBIN 5 5 Note : Cload = 25pF. C L K5 4I 1 C L K VD O (27 M H z) 2b 2a D a ta O u tp u t (A ) 2 7 M H z O u tp u t M od e C L K5 4I 1 C L K VD O (54 M H z) 3b 3a D a ta O u tp u t (B ) 5 4 M H z O u tp u t M od e PBCLK 4a P B _ IN 4b (C ) P BC L K Inpu t T iming Fig 80 Clock Timing Diagram Techwell, Inc. www.techwellinc.com 249 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Parameter SDAT setup time SDAT hold time Setup time for START condition Setup time for STOP condition Hold time for START condition Rise time for SCLK and SDAT Fall time for SCLK and SDAT Capacitive load for each bus line SCLK clock frequency Preliminary Typ Max Units us ns 0.9 us us us us 300 300 400 400 ns ns pF KHz Table 19. Serial Interface Timing Symbol Min tBF tsSDAT thSDAT tsSTA tsSTOP thSTA tR tF CBUS fSCLK 1.3 100 0 0.6 0.6 0.6 Bus Free Time between STOP and START Stop Start Data tBF tsSDAT thSDAT Start Stop SDA tR tF tsSTA thSTA tsSTO SCL Fig 81. Serial Interface Timing Diagram Techwell, Inc. www.techwellinc.com 250 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Table 20 Parallel Interface Timing Parameter Parameter CSB setup until AEN active PDATA setup until AEN,WENB active AEN, WENB, RENB active pulse width CSB hold after WENB, RENB inactive PDATA hold after AEN,WENB inactive PDATA delay after RENB active PDATA delay after RENB inactive CSB inactive pulse width RENB active delay after AEN inactive RENB active delay after RENB inactive Symbol Tsu(1) Tsu(2) Tw Th(1) Th(2) Td(1) Td(2) Tcs Trd 60 60 60 Min 10 10 40 60 20 Typ Preliminary Max Units ns ns ns ns ns 12 ns ns ns ns CSB Tsu(1) Tw Tw Th(1) Tcs WENB RENB AEN Tw PDATA Index Address Tsu(2) Th(2) Tsu(2) Write Th(2) Tsu(2) Write Th(2) Fig 82 Write timing of parallel interface with auto index increment mode CSB Tsu(1) Tcs WENB Tw RENB AEN Tw Trd Trd Tw Th(1) PDATA Index Address Tsu(2) Th(2) Td(1) Read Td(2) Td(1) Read Td(2) Fig 83 Read timing of parallel interface with auto index increment mode Techwell, Inc. www.techwellinc.com 251 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Parameter ADC characteristics Differential gain Differential phase Channel Cross-talk DAC characteristic Differential gain Differential phase Channel Cross-talk DGD DpD ctA DGA DpA ctA Preliminary Max 3 2 -50 3 2 -50 Table 21.Analog Performance Parameter Symbol Min Typ Units % deg dB % deg dB Parameter Table 22.Decoder Performance Parameter Symbol Min Typ fH fSC AGC ACC fOSC fOSC/fOSC dtOSC 800 -6 -6 54 Max 6 18 30 Units % Hz dB dB MHz Horizontal PLL permissible static deviation Color Sub-carrier PLL lock in range Video level tracking range Color level tracking range Oscillator Input Nominal frequency Permissible frequency deviation Duty cycle 100 60 ppm % Techwell, Inc. www.techwellinc.com 252 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in VIN0A J100 2 37.4 R102 37.4 AIN0A 2 208 157 139 110 93 64 47 18 151 133 116 99 58 41 24 6 193 201 190 187 185 1 VIN1 R106 37.4 1 AIN1 R107 4.7k C101 15nF RESETn CLK54I U100 VIN1A VDDADAC VDDVDAC VDDVDAC VDDVDAC VDDAADC VDDVADC VDDVADC VDDVADC VDDVADC VDDVADC VDDO VDDO VDDO VDDO VDDO VDDO VDDO VDDO VDDI VDDI VDDI VDDI VDDI VDDI VDDI VDDI 73 74 164 RSTB CLK54I TEST R108 1 VIN2 R110 37.4 R109 1 AIN2 R111 4.7k C102 15nF VIN2A J104 2 AIN2A 37.4 J105 2 4.7k VIN0 AIN3 C103 C104 2.2uF 0.1uF 2.2uF 0.1uF 2.2uF 0.1uF 2.2uF 0.1uF 166 167 170 171 176 177 180 181 PBIN[7] PBIN[6] PBIN[5] PBIN[4] PBIN[3] PBIN[2] PBIN[1] PBIN[0] PBCLK MPP2[7] MPP2[6] MPP2[5] MPP2[4] MPP2[3] MPP2[2] MPP2[1] MPP2[0] CLKMPP2 MPP1[7] MPP1[6] MPP1[5] MPP1[4] MPP1[3] MPP1[2] MPP1[1] MPP1[0] CLKMPP1 DLINKI[7] DLINKI[6] DLINKI[5] DLINKI[4] DLINKI[3] DLINKI[2] DLINKI[1] DLINKI[0] VLINKI HLINKI ALINKI ALINKO IRQ HDAT[0] HDAT[1] HDAT[2] HDAT[3] HDAT[4] HDAT[5] HDAT[6] HDAT[7] HWRB HRDB HALE HCSB1 HCSB0 HSPB CLKVDOX VDOX[7] VDOX[6] VDOX[5] VDOX[4] VDOX[3] VDOX[2] VDOX[1] VDOX[0] FLDENC VSENC HSENC CLKVDOY VDOY[7] VDOY[6] VDOY[5] VDOY[4] VDOY[3] VDOY[2] VDOY[1] VDOY[0] 43 44 45 46 48 49 50 51 54 152 153 154 155 158 159 160 161 150 204 205 206 207 2 3 4 5 7 149 148 147 146 144 143 142 141 140 138 137 22 72 71 69 68 67 66 65 63 62 61 60 59 57 56 55 17 8 9 10 11 13 14 15 16 19 20 21 32 33 34 36 37 38 39 40 42 PBIN7 PBIN6 PBIN5 PBIN4 PBIN3 PBIN2 PBIN1 PBIN0 PBIN[7:0] PBCLK MPP2[7] MPP2[6] MPP2[5] MPP2[4] MPP2[3] MPP2[2] MPP2[1] MPP2[0] CLKMPP2 MPP1[7] MPP1[6] MPP1[5] MPP1[4] MPP1[3] MPP1[2] MPP1[1] MPP1[0] CLKMPP1 DLINKI7 DLINKI6 DLINKI5 DLINKI4 DLINKI3 DLINKI2 DLINKI1 DLINKI0 DLINKI[7:0] VIN0A VIN0B VIN1A VIN1B VIN2A VIN2B VIN3A VIN3B R112 1 VIN3 R113 1 VIN3A AIN3A 37.4 4.7k 15nF C107 VIN2 C108 C109 VIN3 C110 C111 VDD5A R116 R117 C 2K B C Q101 MMBT3904S E R120 1K R121 1K B R118 400K C115 + C112 8.2nF 4.7K AOUT Analog Audio Input Q100 MMBT3904S AIN0 AIN1 AIN2 AIN3 C113 C114 C116 C118 2.2uF 2.2uF 2.2uF 2.2uF 197 198 199 200 AIN0 AIN1 AIN2 AIN3 AOUT C117 R119 10uF/6.3V 200K 1 L100 C119 330pF 18pF 1.8uH C120 330pF VAOYX R122 75 J108 2 VAOYX J109 2 VAOYX 184 186 189 191 VAOYX VAOCX VAOYY NC Analog Video Audio Output VAOCX VAOYY TW2835 (208P QFP) C121 1 J110 2 L101 C123 330pF 18pF 1.8uH C124 330pF VAOCX 1 C122 L102 C125 330pF 18pF 1.8uH C126 330pF VAOYY R124 75 VLINKI HLINKI ALINKI ALINKO IRQ HDAT[7:0] VAOCX VAOYY R123 75 J111 2 AOUT ADDR[10:0] ADDR10 ADDR9 ADDR8 ADDR7 ADDR6 ADDR5 ADDR4 ADDR3 ADDR2 ADDR1 ADDR0 194 AOUT VDD3.3V L103 BEAD 600ohm/2A + C127 100uF/16V C128 0.1uF 4 GND OUT 5 33 R125 CLK54I BA0 BA1 RASB CASB WEB DQM 1 OSC100 NC VCC 8 95 96 97 98 100 101 102 103 106 107 108 111 109 113 114 115 117 112 ADDR[10]/AP ADDR[9] ADDR[8] ADDR[7] ADDR[6] ADDR[5] ADDR[4] ADDR[3] ADDR[2] ADDR[1] ADDR[0] BA0 BA1 RASB CASB WEB DQM CLK54MEM DATA[31] DATA[30] DATA[29] DATA[28] DATA[27] DATA[26] DATA[25] DATA[24] DATA[23] DATA[22] DATA[21] DATA[20] DATA[19] DATA[18] DATA[17] DATA[16] DATA[15] DATA[14] DATA[13] DATA[12] DATA[11] DATA[10] DATA[9] DATA[8] DATA[7] DATA[6] DATA[5] DATA[4] DATA[3] DATA[2] DATA[1] DATA[0] HWRB HRDB HALE HCSB1 HCSB0 HSPB CLKVDOX VDOX[7:0] VDD1.8V L105 BEAD 600ohm/2A + C130 100uF/16V C133 0.1uF VDDVADC SDRAM Interface VDD1.8V L104 BEAD 600ohm/2A + C129 VDDAADC CLK54MEM DATA[31:0] DATA31 DATA30 DATA29 DATA28 DATA27 DATA26 DATA25 DATA24 DATA23 DATA22 DATA21 DATA20 DATA19 DATA18 DATA17 DATA16 DATA15 DATA14 DATA13 DATA12 DATA11 DATA10 DATA9 DATA8 DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0 C134 0.1uF C135 0.1uF C136 0.1uF C137 0.1uF C138 0.1uF C131 0.1uF C132 0.1uF 100uF/16V VDD1.8V L106 BEAD 600ohm/2A + C139 100uF/16V C141 0.1uF VDDVDAC VDD1.8V L107 BEAD 600ohm/2A VDDADAC C142 0.1uF C143 0.1uF C144 0.1uF + C140 100uF/16V C145 0.1uF C146 0.1uF VDOY7 VDOY6 VDOY5 VDOY4 VDOY3 VDOY2 VDOY1 VDOY0 CLKVDOY VDOY[7:0] Place near each device power pin(0.1uF Cap.) VDD1.8V L108 BEAD 600ohm/2A + C147 100uF/16V C148 0.1uF C149 0.1uF C150 0.1uF C151 0.1uF C152 0.1uF C153 0.1uF VDDI Place near each device power pin(0.1uF Cap.) C154 0.1uF C155 0.1uF C156 0.1uF ADATR ASYNR ACLKR ADATP ASYNP ACLKP 25 26 27 28 30 31 ADATR ASYNR ACLKR ADATP ASYNP ACLKP Place near each device power pin(0.1uF Cap.) VDD3.3V L109 BEAD 600ohm/2A + C157 100uF/16V C159 0.1uF C160 0.1uF C161 0.1uF C162 0.1uF C163 0.1uF C164 0.1uF C165 0.1uF C166 0.1uF C167 0.1uF VDDO VDD5 L110 BEAD 600 ohm/2A + C158 100uF/16V C168 0.1uF VDD5A TW2835_QFP Place near each device power pin(0.1uF Cap.) 1 12 29 35 52 53 70 75 81 87 104 105 122 128 145 156 162 163 168 169 174 178 179 183 188 192 195 196 202 203 VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS Techwell, Inc. www.techwellinc.com 253 Oct, 10, 2006 Datasheet Rev. 1.2 Audio Interface ADATM 23 ADATM CCIR 656 Output for Record Place near each device power pin(0.1uF Cap.) Place near each device power pin(0.1uF Cap.) 76 77 78 79 80 82 83 84 85 86 88 89 90 91 92 94 118 119 120 121 123 124 125 126 127 129 130 131 132 134 135 136 VDOX7 VDOX6 VDOX5 VDOX4 VDOX3 VDOX2 VDOX1 VDOX0 FLDENC VSENC HSENC CCIR 656 Output for Display OSC 54MHz Host Interface HDAT0 HDAT1 HDAT2 HDAT3 HDAT4 HDAT5 HDAT6 HDAT7 Cascade Interface 1 E Multi-purpose Interface Analog Video Input J106 2 37.4 R114 J107 2 4.7k R115 C106 VIN1 C105 CCIR 656 Input for Playback J102 2 AIN1A 37.4 J103 2 4.7K 182 175 173 172 165 www.DataSheet.in TW2835 Video and Audio Controller Application Schematic R100 1 VIN0 R101 1 J101 4.7K R103 4.7k R105 AIN0 C100 15nF VDDO VDDI VDDADAC VDDAADC VDDVDAC VDDVADC Preliminary R104 www.DataSheet.in TW2835 Video and Audio Controller Package Dimension 208 QFP Preliminary Techwell, Inc. www.techwellinc.com 254 Oct, 10, 2006 Datasheet Rev. 1.2 TW2835 Video and Audio Controller 256 LBGA Preliminary Techwell, Inc. www.techwellinc.com 255 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in TW2835 Video and Audio Controller Revision History Preliminary Table 23 Datasheet Revision History Revision 1.0 Date Jul. 05. 2006 Description Preliminary Datasheet Release Update the Errata 1) Update the Fig 49 ~ Fig 52 for SYNC_DEL value (P. 78 ~ P. 81) Update the register description for SYNC_DEL (P. 208) 2) Update the register description for VIS_CODE_EN (P.209) 3) Update the register description for 2DBOX_HL (P.239) Update the Errata 1) Update the description of noise reduction (P. 69) 2) Update the Fig 52 (P. 81) 3) Correct the register address mismatch (P.83, P.87, P.88) 4) Update the register description for NR_EN (P. 116) 5) Update the register description for MIX_OUTSEL (P.155) 6) Remove the register description for ENHANCE (P. 198) 7) Update the recommended schematic for Audio LPF filter (P.253) Product Code BAPA1 1.1 Jul. 10.2006 BAPA1 1.2 Oct. 10. 2006 BAPA1 Techwell, Inc. www.techwellinc.com 256 Oct, 10, 2006 Datasheet Rev. 1.2 www.DataSheet.in |
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