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PDF VT8751 Data sheet ( Hoja de datos )
| Número de pieza | VT8751 | |
| Descripción | Single-Chip SMA North Bridge | |
| Fabricantes | Via | |
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Single-Chip SMA North Bridge
for Pentium 4™ CPUs with 400 MHz FSB,
External 4x AGP Bus and
Integrated ProSavage8™ AGP Graphics Core
plus Advanced ECC Memory Controller
supporting PC2100 / PC1600 DDR SDRAM
and PC133 / PC100 SDR SDRAM
for Desktop PC Systems
Revision 1.1
July 19, 2002
a joint development of
VIA TECHNOLOGIES, INC.
and S3 GRAPHICS, INC.
1 page  
TecWhne oCloongnieecst , Inc.
ProSavageDDR P4M266 – VT8751 P4 DDR SMA North Bridge
PCI Configuration ................................................................................................................................................................ 53
PCI Subsystem ID................................................................................................................................................................. 54
Integrated AGP..................................................................................................................................................................... 54
DISPLAY MEMORY ...................................................................................................................................................................... 55
INTERRUPT GENERATION ........................................................................................................................................................... 55
DISPLAY INTERFACES.................................................................................................................................................................. 56
TFT Flat Panel DVI Interface ............................................................................................................................................. 56
CRT Interface ....................................................................................................................................................................... 56
External TV Encoder Interface........................................................................................................................................... 57
I2C Serial Communications Port ......................................................................................................................................... 57
ELECTRICAL SPECIFICATIONS .............................................................................................................................................. 58
ABSOLUTE MAXIMUM RATINGS ................................................................................................................................................. 58
DC CHARACTERISTICS ............................................................................................................................................................... 58
PACKAGE WEIGHT SPECIFICATIONS.......................................................................................................................................... 58
POWER CHARACTERISTICS ......................................................................................................................................................... 59
AC TIMING SPECIFICATIONS...................................................................................................................................................... 60
MECHANICAL SPECIFICATIONS............................................................................................................................................. 62
Revision 1.1, July 19, 2002
-iii-
Table of Contents
5 Page 
TecWhne oCloongnieecst , Inc.
ProSavageDDR P4M266 – VT8751 P4 DDR SMA North Bridge
P4M266 also integrates S3 Graphics’ 128-bit ProSavage8 graphics accelerator into a single chip. P4M266 brings mainstream
graphics performance to the Value PC with leading-edge 2D, 3D and DVD video acceleration into a cost effective package. Based
on its capabilities, P4M266 is an ideal solution for the consumer, corporate mobile users and entry level professionals.
The industry’s first integrated Pentium 4 AGP solution to support DDR memory, P4M266 combines AGP 8x performance with
Microsoft DirectX texture compression and massive 2Kx2K textures to deliver unprecedented 3D performance and image quality
for the Value PC mobile market.
The 376-pin Ball Grid Array VT8233 Client V-Link PCI / LPC controller supports four levels (doublewords) of line buffers, type
F DMA transfers and delay transaction to allow efficient PCI bus utilization and (PCI-2.1 compliant). The VT8233 integrated PCI
controller and PCI arbitration for up to five PCI slots. One of the PCI REQ / GNT pair can be configured as high-priority to better
support a low latency PCI bus master device. The VT8233 integrated networking MAC controller with standard MII interface to
an external PHY for 10/100Mb base-T Ethernet or 1/10Mb PNA home networking.
The VT8233 also includes an integrated keyboard controller with PS2 mouse support, integrated DS12885 style real time clock
with extended 256 byte CMOS RAM, integrated master mode enhanced IDE controller with full scatter / gather capability and
extension to UltraDMA-33/66/100 for 33/66/100 MB/sec transfer rate, integrated USB interface with root hubs and six functional
ports with built-in physical layer transceivers, Distributed DMA support, and OnNow / ACPI compliant advanced configuration
and power management interface.
For sophisticated power management, P4M266 provides independent clock stop control for the CPU / SDRAM and AGP bus plus
Dynamic CKE control for powering down of the SDRAM. A separate suspend-well plane is implemented for the SDRAM control
signals for Suspend-to-DRAM operation. Coupled with the VT8233 south bridge chip, a complete power conscious PC main
board can be implemented with no external TTLs.
High-Performance 3D Accelerator
Featuring a new super-pipelined 128-bit engine, P4M266 utilizes a single cycle architecture that provides high performance along
with superior image quality. Several new features enhance the 3D architecture, including single-pass multitexturing, anisotropic
filtering, and an 8-bit stencil buffer. In addition with DDR266 (PC2100) system memory, the ProSavage8 graphics controller will
achieve up to 8x AGP equivalent performance (2.1 MB/sec 3D data transfers). P4M266 also offers the industry’s only
simultaneous usage of single-pass multitexturing and single-cycle trilinear filtering – enabling stunning image quality without
performance loss. P4M266 further enhances image quality with true 32-bit color rendering throughout the 3D pipeline to produce
more vivid and realistic images. P4M266’s advanced triangle setup engine provides industry leading 3D performance for a
realistic user experience in games and other interactive 3D applications. The 3D engine is optimized for AGP texturing from
system memory.
128-bit 2D Graphics Engine
P4M266’s advanced 128-bit 2D graphics engine delivers high-speed 2D acceleration for productivity applications. Several
enhancements have been made to the 2D architecture to optimize SMA performance and to provide acceleration in all color
depths.
DVD Playback and Video Conferencing
P4M266 provides the ideal architecture for high quality MPEG-2 based DVD applications and video conferencing. For DVD
playback, P4M266’s video accelerator offloads the CPU by performing the planar to packed format conversion and motion
compensation tasks, while its enhanced scaling algorithm delivers incredible full-screen video playback. For video conferencing,
P4M266’s multiple video windows enable a cost effective solution.
Flat Panel Monitor / TV Out Support
The P4M266 can drive an external flat panel monitor via a 12-bit interface to a TMDS encoder. This inteface is Digital Visual
Interface (DVI) 1.0 compliant. All resolutions are supported up to 1280x1024. This interface can alternately be configured to
drive an external TV encoder chip for driving a standard television set.
Revision 1.1, July 19, 2002
-5-
Overview
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