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Winbond Electronics

W9971CF Datasheet Preview

W9971CF Datasheet

Video Graphics Controller With TV Encoder

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W9971CF
GENERAL DESCRIPTION
Winbond s W9971CF is a highly-integrated VLSI providing high performance graphics acceleration
and TV-quality full screen motion video acceleration for IBM PCs or compatibles. The W9971CF
integrates an NTSC/PAL TV encoder with S-Video or composite video for flicker-free and glueless
TV output. An on-chip RAMDAC and a dual programmable clock synthesizer with a 170 MHz pixel
data rate are also integrated into the chip to simplify system design and reduce cost.
The W9971CF is a high-performance graphics accelerator specially designed for Microsoft
Windows, Mac OS, IBM OS/2, and DOS-based applications. In addition to 100% IBM VGA register-
level compatibility, the W9971CF incorporates a 64-bit graphics engine (GE) to accelerate drawing
functions such as bit block transfer (BitBLT), line drawing, clipping, and hardware cursor
manipulation.
The W9971CF s integrated video accelerator (VA) features high-quality video filtering, bilinear
interpolating scaling along both the X and Y axes, color space conversion and overlay keying. In
addition to accelerating software video playback, the W9971CF also provides an advanced
multimedia video interface for glueless interfacing to major TV decoders such as the Philips
SAA711X and the Brooktree Bt815A/7A/9A. The 16-bit baseline VESA Advanced Feature
Connector (VAFC) and the 8-bit bidirectional IBM Feature Connector are also supported for legacy
video applications. By performing scaling and color space conversion on the fly, the W9971CF
provides high-quality video playback in 1024 × 768 256-color mode with only 1 MByte of DRAM.
The W9971CF integrates a high quality NTSC/PAL TV encoder to directly interface to TV sets. It
allows an NTSC/PAL TV to be used as the primary or secondary display for Windows-based and
video playback applications. The TV output capabilities are required for Microsoft Entertainment PC
97 designs that do not come bundled with a VGA monitor. These capabilities provide a more
realistic game, video, and multimedia experience for users who use large-screen TVs.
The flexible display memory interface design of the W9971CF allows system designers to select
various types of DRAMs, including 128K × 8, 128K × 16, 256K × 4, 256K × 8, and 256K × 16. These
DRAMs may be used in either fast page or extended data out (EDO) modes.
The W9971CF supports a glueless interface with the 32-bit PCI Local Bus. Green PC power
management is supported via VESA Display Power Management Signaling (DPMS) and power-
down of the on-chip RAMDAC and clock synthesizers. VESA DDC1 and DDC2 smart monitor
control is also supported.
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Winbond Electronics

W9971CF Datasheet Preview

W9971CF Datasheet

Video Graphics Controller With TV Encoder

No Preview Available !

www.DataSheet4U.com
W9971CF
FEATURES
q Integrated Video Graphics Controller with TV encoder
64-bit graphics engine
Integrated video accelerator
On-chip 24-bit true color RAMDAC with up to 170 MHz pixel clock rate
On-chip clock synthesizers generating up to 170 MHz VCLK and 100 MHz MCLK
On-chip flicker filtering and NTSC/PAL TV encoder
q GUI Acceleration
64-bit GUI acceleration
Fast frame buffer blts include screen to screen blt, pattern blt, color/font expanding blt,
color/font expansion, rectangle fill, etc.
256 ROPs (Raster Operations) for all 8/15/16/24 bit-per-pixel modes
Transparent blt using the color key for source or destination
Accelerated Bresenham line draw and Short Stroke Vector
Rectangle and line clipping
Built-in 64×64×2 or 32×32×2 hardware cursor
q Video Conferencing Acceleration
Glueless digital camera interface with direct support of CCIR 656 format; analog camera
support with external video decoder
Hardware 2-dimensional down-scaling for local view capture
Hardware dual-video window for local and remote viewing
Built-in Color Space Conversion and 2-dimensional bi-linearly interpolated up-scaling
q Video Playback Acceleration
Video (YUV) and graphics (RGB) shared frame buffer architecture
RGB 5:5:5, RGB 5:6:5, and YUV 4:2:2 packed video formats support
Double buffering and single command page flipping for anti-tearing support
Readable current scan line refresh to allow behind the beam writing in non-double-buffered
scenarios
On-the-fly 2-D bi-linear interpolation and arbitrary up-scaling
On-chip standard CCIR 601 YUV to RGB CSC (Color Space Conversion)
On-the-fly interpolated up-scaling to allow 320×200 game image to be displayed at 640×
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Color keying, chroma keying, and window keying to overlay video and graphics streams
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Part Number W9971CF
Description Video Graphics Controller With TV Encoder
Maker Winbond Electronics
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