CX25874/5 Digital Encoder with Standard-Definition TV and High-Definition TV Video Output Data Sheet
101900B August 2004 Ordering Information
Model Number Package Operating Temperature
CX25874 64-pin TQFP 0 °C – 70 °C
CX25875(1)(2)(3) 64-pin TQFP 0 °C – 70 °C Note(s): 1. Macrovision 7.1.L1 Standard-Definition Television (SDTV) compliant (customer must possess Macrovision license (“) to purchase CX25875). 2. Macrovision 525p (480p) High-Definition Television (HDTV) progressive scan output compliant. 3. Customer must possess Macrovision license to purchase CX25875.
Revision History
Revision Level Date Description
A August 15, 2002 Initial release B August 26, 2004 Second release
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ii Conexant 101900B 8/26/04 CX25874/5 Digital Encoder with SDTV and HDTV Video Distinguishing Features Output 4 high-performance, 10-bit DACs HDTV output mode (patents pending) Conexant’s CX25874/5 Digital Encoder (DENC) is specifically designed to meet TV out Compliant with EIA770-3 and SMPTE274M (1080i), SMPTE296M system requirements for the next-generation desktop PCs, notebook PCs, game (720p), ITU-R.BT1358 (625p and consoles, progressive DVD players, and set-top boxes. With software-forward 525p) and ITU-R.BT.709-4 (1035i and compatibility to the CX25870/871, manufacturers can quickly bring to market new CIF 30/ PsF and 60/ I) standards solutions that require adaptive flicker filtering, ATSC HDTV outputs, and active Automatic trilevel sync and broad resolutions from 320 x 200 (minimum) to 1024 x 768 (maximum). pulse generation Direct YPRPB or RGB HDTV outputs Adaptive flicker filtering is a Conexant technology in which the encoder looks at the from progressive RGB graphics video characteristics of the video content on a pixel-by-pixel basis and automatically in 1080i, 720p, 480p ATSC and determines the optimal amount of flicker filtering required. If an end-user wants to ITU-R.BT.1358 625p and 525p resolutions work on a spreadsheet while watching a DVD movie in a window, both the text- Direct YPRPB HDTV outputs from intensive application requiring a lot of flicker filtering, and the DVD movie requiring YCrCb or YPrPb graphics video in very little flicker filtering can look their best. 1080i, 720p, 480p ATSC and ITU-R.BT.1358 625p and 525p The CX25874/5 also provides a three-signal analog RGB or YPRPB HDTV output. While resolutions in HDTV output mode, the CX25874/5 will automatically insert horizontal trilevel Support for Japan D1 (525i), D2 synchronization pulses and vertical synchronization broad pulses. The CX25874/5 is (D1+525p), D3 (D2+750p), D4 compliant with the EIA770-3 and SMPTE 274M/293M/296M standards and supports (D3+1125i) HDTV formats all major ATSC HDTV resolutions including 480p, 625p (576p), 720p, and 1080i. Software and register forward-compatible with the Bt868/869, CX25870/871, and All worldwide standard-definition composite outputs are supported, including NTSC-M CX25872/873 (N. America, Taiwan), NTSC-J (Japan), NTSC 4.43, PAL-B, D, G, H, I (Europe, Asia), Worldwide standard-definition TV PAL-M (Brazil), PAL-N (Uruguay, Paraguay), PAL-Nc (Argentina), PAL-60 (China) and support: NTSC-M, J, 4.43, PAL-B, D, G, H, SECAM (France, elsewhere). For enhanced TV viewing, S-video (SVHS) can be I, M, N, Nc, 60, and SECAM NTSC-M, -J, -4.43 SDTV outputs transmitted as well. The CX25874 and CX25875 are functionally identical, except the conform to SMPTE 170M standard CX25875 can output standard-definition video with Macrovision® Level 7.1.L1 copy PAL-B, -D, G, H, I, M, N, Nc, 60 protection capability, and HDTV with Macrovision 525p (480p) copy protection for conform to ITU-R.BT.470 standard progressive scan outputs. Adaptive flicker filtering for enhanced image quality (patents pending), and Functional Block Diagram peaking filters for text sharpness Programmable overscan compensation Color 12 Input Flicker from 0% to 25% Space FIFO P[11:0] DEMUX Filter/ Conversion Scaler Programmable power management #1 Wide-Screen Signaling (WSS) and CGMS HSYNC* FSADJUST VSYNC* Timing support for variable clock rates BLANK* Internal COMP Adheres to EIAJ CPR-1204 and 1204- FIELD Reference VREF 1, 1204-2, and EN300 294 standards SIC Serial 10-Bit DACA 3.3 V operation with scalable low-voltage SID Interface graphics controller interface and serial ALTADDR Video 10-Bit DACB Encoder DAC bus from 3.3 V to 1.1 V MUX TM RESET* Colorstream (EIA 770.2) and Super Color 10-Bit DACC TM SLEEP Space Colorstream component video outputs Conversion #2 10-Bit DACD Component YCRCB analog outputs GPO[2:0] To Internal Luma and chroma comb filtering Clocks XTALIN SCART RGB or Y/C output for Europe XTAL Clock PLL OSC Generation CLKO 4th DAC is NTSC/PAL composite XTALOUT CLKI EN50-049 and IEC 933-1 compliant
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101900B Conexant iii 8/26/04 Distinguishing Features (continued)