RG82855GMESL72L Datasheet, PDF (19/213 Pages) Intel Corporation – Intel® 855GM/855GME Chipset Graphics and Memory Controller Hub (GMCH)

Introduction
R
1 Introduction
This datasheet provides Intel’s specifications for the Intel^® 855GM/855GME chipset based
system.
The Intel 855GM/855GME chipset graphics and memory controller hub (GMCH) is also an Intel^®
Centrino™ mobile technology component. Intel Centrino mobile technology with integrated
wireless LAN capabilities was designed specifically for wireless notebook PCs – delivering
outstanding mobile performance and enabling extended battery life, and thinner, lighter designs.
Note:
Wireless connectivity and some features may require you to purchase additional software,
services or external hardware. Availability of public wireless LAN access points limited. System
performance measured by MobileMark* 2002. System performance, battery life, wireless
performance and functionality will vary depending on your specific hardware and software
configurations. See http://www.intel.com/products/centrino/moreinfo for more information.
1.1
Terminology
Term
Description
AGTL+
DDC
DPMS
I2C
CRT
LCD
BLI
Core
CPU
DBI
DBL
DVO
DVI*
DVMT
EDID
Full Reset
GMCH
Hub Interface (HI)
Advanced Gunning Transceiver Logic + (AGTL+) bus
Display Data Channel (standard created by VESA)
Display Power Management Signaling (standard created by VESA)
Inter-IC (a two wire serial bus created by Philips)
Cathode Ray Tube
Liquid Crystal Display
Backlight Inverter
The internal base logic in the Intel 855GM/GME GMCH
Central Processing Unit
Dynamic Bus inversion
Display Brightness Link
Digital Video Out
Digital Visual Interface is the interface specified by the DDWG (Digital Display
Working Group) DVI Spec. Rev. 1.0 utilizing only the Silicon Image developed
TMDS protocol
Dynamic Video Memory Technology
Extended Display Identification Data
A Full Intel 855GM/GME GMCH Reset is defined in this document when
RSTIN# is asserted
Graphics and Memory Controller Hub
The proprietary interconnect between the Intel 855GM/GME GMCH and the
ICH4-M component. In this document, the Hub interface cycles originating from
Datasheet
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