JG82855GMESL7VN Datasheet, PDF (20/213 Pages) Intel Corporation – Intel® 855GM/855GME Chipset Graphics and Memory Controller Hub (GMCH)

Introduction
R
Term
Host
IGD
Intel 855GM/GME
GMCH
Intel 82801DBM ICH4-M
Intel Pentium M
Processor
IPI
LFP
LVDS
MSI
FSB
PWM
SSC
System Bus
UMA
VDL
Description
or destined for the ICH4-M are generally referred to as “Hub interface cycles.”
Hub cycles originating from or destined for the primary PCI interface on are
sometimes referred to as “Hub interface/PCI cycles”
This term is used synonymously with processor
Integrated Graphics Device
Refers to the GMCH component. Throughout this datasheet, the Intel
855GM/GME GMCH will be referred to as the GMCH.
The component contains the primary PCI interface, LPC interface, USB 2.0,
ATA-100, AC’97, and other I/O functions. It communicates with the Intel
855GM/GME GMCH over a proprietary interconnect called the Hub interface.
Throughout this datasheet, the Intel 82801DBM ICH4-M component will be
referred to as the ICH4-M
Refers to the Intel Pentium M Processor and Intel Pentium M Processor
on 90nm process with 2-MB L2 Cache. Intel Pentium M Processor will
reference both processors unless specified
Inter Processor Interrupt
Local Flat Panel
Low Voltage Differential Signals used for interfacing to LCD Flat Panels
Message Signaled Interrupts. MSI allow a device to request interrupt service
via a standard memory write transaction instead of through a hardware signal
Front side bus. Connection between Intel 855GM/GME GMCH and the CPU.
Also known as the Host interface
Pulse Width Modulation
Spread Spectrum Clocking
Processor-to-Intel 855GM/GME GMCH interface. The Enhanced mode of the
Scalable bus is the P6 Bus plus enhancements, consisting of source
synchronous transfers for address and data, and system bus interrupt delivery.
The Intel Pentium M processor, Intel Pentium M on 90nm process with 2-MB L2
Cache and Intel Celeron M processor implement a subset of Enhanced mode.
Unified Memory Architecture with graphics memory for the IGD inside system
memory
Video Data Link
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Datasheet