Datasheet

ManualsBrandsMSI ManualsComputer equipment845GVM2-V

Introduction

14 Intel

82845G/82845GL/82845GV GMCH Datasheet

1.2 Related Documents

NOTE: For additional related documents, refer to the Intel

Pentium

4 Processor in 478-Pin Package and

Intel

845G/845GL/845GV Chipset Platform Design Guide.

Graphics Core

The internal graphics related logic in the GMCH. Also known as the Integrated Graphics

Device (IGD).

Hub Interface. The proprietary hub interconnect that ties the GMCH to the ICH4. In this

document HI cycles originating from or destined for the primary PCI interface on the ICH4

are generally referred to as HI/PCI or simply HI cycles.

Host This term is used synonymously with processor or CPU.

Intel

ICH4 Fourth generation I/O Controller Hub component.

IGD Integrated Graphics Device. Graphics device integrated into the GMCH.

LVTTL Low Voltage TTL 3.3 V (SDR).

Primary PCI

The physical PCI bus that is driven directly by the ICH4 component. Communication

between the PCI and the GMCH occurs over the hub interface. Note that even though the

Primary PCI bus is referred to as PCI, it is not PCI Bus #0 from a configuration standpoint.

PSB

Processor System Bus. This is the bus between the GMCH and processor (also referred

to as the Host, FSB, or processor bus).

Scalable Bus

Processor-to-GMCH interface. The Compatible Mode of the Scalable Bus is the P6 bus.

The Enhanced Mode of the Scalable Bus is the P6 Bus plus enhancements primarily

consisting of source synchronous transfers for address and data, and PSB interrupt

delivery. The Intel

Pentium 4 processor implements a subset of Enhanced Mode.

SDR Single Data Rate SDRAM.

SDRAM Synchronous Dynamic Random Access Memory.

Secondary PCI

The physical PCI interface that is a subset of the AGP bus driven directly by the GMCH. It

supports a subset of 32-bit, 66 MHz PCI Local Bus Specification, Revision 2.1-compliant

components, but only at 1.5 V (not 3.3 V or 5 V).

SSTL_2 Stub Series Terminated Logic for 2.5 V (DDR).

Document Document Number/ Location

Intel

Pentium

4 Processor in 478-Pin Package and Intel

845G/845GL/

82845GV Chipset Platform Design Guide

298654

Intel

845G/845GL/845GV Chipset Thermal Design Guide 298655

Intel

82801DB I/O Controller Hub 4 (ICH4) Datasheet 290744

Intel

Pentium

4 Processor in the 478-Pin Package Datasheet 249887

JEDEC Double Data Rate (DDR) SDRAM Specification www.jedec.org

Intel

PC SDRAM Specification

http://developer.intel.com/

technology/memory/pcsdram/

spec/index.htm

Accelerated Graphics Port Interface Specification, Revision 2.0

http://www.intel.com/technology/

agp/agp_index.htm

Digital Visual Interface (DVI) Specification, Revision 1.0

Term Description