Winbond Electronics W9970CF Datasheet
W9970CF
Video Graphics Controller
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
ú HostBLT
ú Pattern BLT
ú Color/font expanding BLT
ú Transparent BLT
ú Color/font expansion
ú Rectangle fill
ú 256 three-operand (source, pattern and
destination) ROPs
• Bresenham line drawing
• Short stroke vector drawing
• Rectangle and line clipping
• 64 × 64 × 2 or 32 × 32 × 2 hardware cursor
❑
Video Acceleration
• Video (YUV) and graphics (RGB) shared frame
buffer architecture
• Two-dimensional bilinear interpolation scaling with
1-pixel resolution from 1× to 8×
• On-chip standard CCIR 601 YUV to RGB color space
conversion
• Cropping window and filtering supports
• Hardware support for Microsoft DirectDraw feature
set
ú Double buffering and page flipping to prevent from
tearing in image
ú Transparent BitBLTs of sprites for game
acceleration
ú Color keying, chroma keying and window keying
to overlay video and graphics streams
ú On-the-fly blending of video and graphics streams
• Supports 2× scaling to allow 320×200 game image to
be displayed at 640 × 480 full-screen resolution
• High-quality video playback requiring only 1 MByte
DRAM in 1024 × 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
❑
System Bus Interface
• Glueless support for 32-bit PCI Local Bus Revision
2.1 specification
• Zero-wait-state PCI burst mode support
• Linear addressing
• Memory-mapped I/O
❑
Display Memory Interface
• 64 or 32-bit DRAM interface in a 1, 2, or 4 MByte
configuration
• Flexible interface support for 128K × 8, 128K × 16,
256K × 4, 256K × 8, or 256K × 16 DRAMs
Preliminary -1- March 1996
W9970CF
• EDO DRAM support, dual-CAS# and dual-WE# ×16
DRAMs support
• Auto memory size detection and auto bank switching
• Supports UMA (Unified Memory Architecture) to
share frame buffer with system memory
❑
Green PC support
• VESA DPMS
VAFC/Feature Connector
(optional)
Live-Video
TV
Decoder
(optional)
MPEG-1
Decoder
(optional)
• RAMDAC/clock synthesizers power management
❑
Smart monitor control
• VESA-compatible DDC1 and DDC2
❑
Packaging
• 208-pin PQFP package
DRAM
Display
Memory
64
W9970CF
RGB
BIOS
32
PCI Bus
Figure 1. W9970CF System Application Diagram
Preliminary -2- March 1996
Loading...