Datasheet

Introduction
R
Datasheet 19
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+ Advanced Gunning Transceiver Logic + (AGTL+) bus
DDC Display Data Channel (standard created by VESA)
DPMS Display Power Management Signaling (standard created by VESA)
I2C Inter-IC (a two wire serial bus created by Philips)
CRT Cathode Ray Tube
LCD Liquid Crystal Display
BLI Backlight Inverter
Core The internal base logic in the Intel 855GM/GME GMCH
CPU Central Processing Unit
DBI Dynamic Bus inversion
DBL Display Brightness Link
DVO Digital Video Out
DVI* 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
DVMT Dynamic Video Memory Technology
EDID Extended Display Identification Data
Full Reset A Full Intel 855GM/GME GMCH Reset is defined in this document when
RSTIN# is asserted
GMCH Graphics and Memory Controller Hub
Hub Interface (HI) The proprietary interconnect between the Intel 855GM/GME GMCH and the
ICH4-M component. In this document, the Hub interface cycles originating from