W9970CF中文资料华邦电子数据手册PDF规格书

OVERVIEW

The W9970CF Integrated Video Graphics Accelerator is a highly integrated product offered by Winbond to provide high-performance graphical user interface (GUI) acceleration and TV-quality full-screen motion video acceleration for PCI Bus-based IBM PCs or their compatibles. An on-chip RAMDAC and dual programmable clock synthesizers with up to 135 MHz pixel data rate are also integrated to simplify system design and reduce cost.

FEATURES

❑ Integrated Video Graphics Controller

• 64-bit graphics engine

• Integrated video accelerator

• On-chip 24-bit true color RAMDAC with up to 135 MHz pixel clock rate

• On-chip clock synthesizers generating up to 135 MHz VCLK and 80 MHz MCLK

❑ Graphics Engine

• 64-bit graphics acceleration

• 8/16/24 bit-per-pixel true color acceleration

• Deep command queue to improve GE performance

• Bit block transfer between system memory and display memory

□ HostBLT

□ Pattern BLT

□ Color/font expanding BLT

□ Transparent BLT

□ Color/font expansion

□ Rectangle fill

□ 256 three-operand (source, pattern and destination) ROPs

• Bresenham line drawing

• Short stroke vector drawing

• Rectangle and line clipping

• 64 x 64 x 2 or 32 ´ 32 x 2 hardware cursor

❑ Video Acceleration

• Video (YUV) and graphics (RGB) shared frame buffer architecture

• Two-dimensional bilinear interpolation scaling with 1-pixel resolution from 1x to 8x

• On-chip standard CCIR 601 YUV to RGB color space conversion

• Cropping window and filtering supports

• Hardware support for Microsoft DirectDraw feature set

□ Double buffering and page flipping to prevent from tearing in image

□ Transparent BitBLTs of sprites for game acceleration

□ Color keying, chroma keying and window keying to overlay video and graphics streams

□ On-the-fly blending of video and graphics streams

• Supports 2x scaling to allow 320´200 game image to be displayed at 640 x 480 full-screen resolution

• High-quality video playback requiring only 1 MByte DRAM in 1024 x 768 256-color mode

• Dual hardware-accelerated video windows for video conference applications

❑ Multimedia Video Interface

• Glueless MPEG-1 video decoder (W9920DF) support for YUV 4:2:2 video input

• Glueless TV decoder support for YUV 4:2:2, NTSC or PAL live-video input

• Support for RGB 5:5:5, 5:6:5 or YUV 4:2:2 software CODEC video input

• Glueless support for 16-bit baseline VESA Advanced Feature Connector (VAFC)

• Glueless support for 8-bit bidirectional pass-through VGA feature connector

❑ Compatibility

• 100 hardware compatible with IBM VGA standard

• VESA BIOS extension support and VESA monitor timing compliant

• Driver support for all major operating systems, such as Windows 3.1, Windows 95, Windows NT, and OS/2 Warp 3.0

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