查询"CX25870"供应商 CX25870/871 Video Encoder with Adaptive Flicker Filtering and HDTV Output Conexant’s CX25870/871 is specifically designed to meet TV out system requirements Distinguishing Features for the next-generation desktop PCs, notebook PCs, game consoles and set-top boxes. • HDTV Output Mode (patents pending) With pin and software-forward compatibility to the Bt868/869, manufacturers can – Compliant with EIA770-3 and SMPTE274M/293M/296M quickly bring to market new solutions that support adaptive flicker filtering, ATSC standards High-Definition Television (HDTV) output, and resolutions from 320 x 200 (minimum) to – Automatic tri-level sync generation – Component (YPRPB) or RGB HDTV 1024 x 768 (maximum). outputs Adaptive flicker filtering is a Conexant technology in which the encoder looks at the – Direct YPRPB or RGB output from characteristics of the video content on a pixel-by-pixel basis and automatically progressive RGB graphics video in 1080i, 720p, 480p ATSC determines the optimal amount of flicker filtering required. If an end-user wants to work resolutions on a spreadsheet while watching a DVD movie in a window, both the text-intensive • Software and register application requiring a lot of flicker filtering and the DVD movie requiring very little forward-compatibility with the Bt868/869 flicker filtering can look their best. The amount of flicker filtering and overscan • Ability to accept many different input compensation is entirely flexible. data formats: – 15/16/24-bit RGB multiplexed or The CX25870/871 also provides a 3-wire analog RGB or YPRPB HDTV output. While nonmultiplexed the encoder is in HDTV output mode, the device will automatically insert horizontal – 16-bit 4:2:2 and 24-bit 4:4:4 YCrCb tri-level synchronization pulses and vertical synchronization broad pulses. The multiplexed or nonmultiplexed – Flexible pixel ordering with various CX25870/871 is compliant with the EIA770-3, SMPTE 274M/293M/296M standards and alternate formats supports ATSC HDTV resolutions including 480p, 720p, and 1080i. • Worldwide video output support: NTSC-M, J, 4.43, PAL-B, D, G, H, I, M, All worldwide standard definition outputs are supported, including NTSC-M (N. N, Nc, 60, and SECAM America, Taiwan), NTSC-J (Japan), PAL-B,D,G,H,I (Europe, Asia), PAL-M (Brazil), PAL-N • Interlaced and noninterlaced outputs (Uruguay, Paraguay), PAL-Nc (Argentina), PAL-60 (China) and SECAM. The CX25870 • S-Video output (simultaneous with and CX25871 are functionally identical, except the CX25871 can output standard composite NTSC, PAL, or SECAM) • SCART RGB or Y/C output for Europe definition video with Macrovision Level 7.1.L1 copy protection capability. – 4th DAC is composite video Functional Block Diagram – EN50-049 and IEC 933-1 compliant • 5-Line vertical filtering scaling for overscan compensation and flicker reduction • Adaptive Flicker Filtering for enhanced Color Flicker 24 Input Space FIFO image and peaking filters for text P[23:0] DEMUX Filter/ sharpness (patents pending) Conversion Scaler #1 • CCIR601/ITU-RBT.601 (i.e., 480i) and CCIR656 compatible input modes HSYNC* FSADJUST • Luma and chroma comb filtering VSYNC* Timing BLANK* Internal COMP • 4 x 10-bit DACs FIELD Reference • Programmable power management VREF • Master, pseudo-master or slave timing SIC Serial 10-Bit DACA operation SID Interface • Auto detection of TV ALTADDR Video • 44 autoconfiguration modes 10-Bit DACB Encoder DAC • Wide-Screen Signaling (WSS) support MUX for variable clock rates RESET* Color 10-Bit DACC – Adheres to EIAJ CPR-1024 and SLEEP Space ITU-R TST.1119-1 standards SLAVE Conversion • Full register set readback capability #2 10-Bit DACD PAL • 3.3 V operation with scalable low To Internal VBIAS voltage graphic controller interface Clocks from 1.8 V to 1.1 V BIAS XTALIN GEN • Buffered crystal clock output pin XTAL Clock PLL • Component YUV analog output OSC Generation CLKO TM XTALOUT CLKI • Colorstream (EIA 770.2) and Super Colorstream TM component video outputs • Macrovision 7.1.L1 copy protection XTL_BFO (CX25871) • Compact 80-pin PQFP package Data Sheet 100381B September 2001 查询"CX25870"供应商 100381B Conexant Ordering Information 查询"CX25870"供应商 Model Number Package Ambient Temperature Range CX25870 80-pin PQFP 0 °C – 70 °C CX25871(1) 80-pin PQFP 0 °C – 70 °C NOTE(S): 1. Macrovision 7.1.L1 compliant (customer must possess Macrovision license to purchase CX25871). © 2001, Conexant Systems, Inc. All Rights Reserved. Information in this document is provided in connection with Conexant Systems, Inc. (“Conexant”) products. These materials are provided by Conexant as a service to its customers and may be used for informational purposes only. Conexant assumes no responsibility for errors or omissions in these materials. Conexant may make changes to specifications and product descriptions at any time, without notice. Conexant makes no commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to its specifications and product descriptions. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. 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For technical questions, contact your local Conexant sales office or field applications engineer. 100381B Conexant 查询"CX25870"供应商 100381B Conexant 查询"CX25870"供应商 Table of Contents List of Figures. vii List of Tables. xi 1.0 Functional Description . 1-1 1.1 Pin Descriptions . 1-1 1.2 GUI Controller Programmability and Frequency Requirement . 1-7 1.3 Device Description . 1-10 1.3.1 Overview . 1-10 1.3.2 Serial Interface. 1-10 1.3.3 Low Voltage Graphics Interface . 1-11 1.3.4 Reset. 1-11 1.3.5 Device Initialization . 1-12 1.3.6 Clocking and Timing Generation . 1-13 1.3.6.1 3:2 Clocking Mode . 1-14 1.3.7 Master, Pseudo-Master, and Slave Interfaces. 1-17 1.3.7.1 Master Interface . 1-17 1.3.7.2 Reason for BLANK* . 1-18 1.3.7.3 Pseudo-Master Interface . 1-18 1.3.7.4 Slave Interface . 1-19 1.3.7.5 Slave Interface Without a Crystal . 1-20 1.3.8 Autoconfiguration and Interface Bits . 1-21 1.3.9 Adaptations for Clock-Limited Master Devices. 1-25 1.3.10 Input Formats . 1-26 1.3.11 Input Pixel Timing . 1-27 1.3.12 YCrCb Inputs (For Standard TV Outputs). 1-27 1.3.13 RGB Inputs (For Standard TV Outputs) . 1-29 1.3.14 Input Pixel Horizontal Sync. 1-29 1.3.15 Input Pixel Vertical Sync. 1-30 1.3.16 Input Pixel Blanking . 1-30 1.3.17 Overscan Compensation. 1-31 1.3.18 Standard Flicker Filtering . 1-35 1.3.19 Adaptive Flicker Filter . 1-36 1.3.20 VGA Registers Involved in the TV Out Process . 1-39 1.3.21 Output Modes . 1-40 100381B Conexant v CX25870/871 Flicker-Free Video Encoder with Ultrascale Technology 查询"CX25870"供应商 1.3.22 Analog Horizontal Sync . 1-40 1.3.23 Analog Vertical Sync. 1-41 1.3.24 Analog Video Blanking . 1-41 1.3.25 Video Output Standards Supported . 1-41 1.3.26 Subcarrier Generation . 1-51 1.3.27 Subcarrier Phase Reset/Offset . 1-51 1.3.28 Burst Generation . 1-52 1.3.29 Video Amplitude Scaling and SINX/X Compensation . 1-52 1.3.30 Chrominance Disable . 1-52 1.3.31 FIELD Pin Output . 1-53 1.3.32 Buffered Crystal Clock Output . 1-55 1.3.33 Noninterlaced Output . 1-55 1.3.34 Closed Captioning (CC) . 1-56 1.3.35 Wide Screen Signaling (WSS). 1-57 1.3.36 Chrominance and Luminance Processing . 1-58 1.3.37 Color Bar and Blue Field Generation . 1-61 1.3.38 CCIR656 Mode Operation . ..