845GL datasheet(181/193 Pages) INTEL

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Intel® 82845G/82845GL/82845GV GMCH Datasheet

181

Intel® 82845GL/82845GV GMCH

Chapter 1 through Chapter 8 of this datasheet described the 82845G component. The first eight

chapters also apply to the 82845GL/82845GV with the differences noted in this chapter. This

chapter describes the differences between the 82845G and 82845GL/82845GV components.

Figure 9-1 is a system block diagram of an 845GL/845GV chipset-based system.

The information in this chapter applies to both the 82845GL and 82845GV components, unless

otherwise noted. Also, unless otherwise noted in this chapter, GMCH applies to both the 82845GL

and 82845GV components.

9.1

Processor System Bus (PSB) Frequency

82845GL: The 82845GL GMCH supports PSB frequency of 400 MHz (100 MHz bus clock) only.

References in the main body of this datasheet to a PSB frequency of 533 MHz are not applicable to

the 82845GL.

82845GV: The 82845GV GMCH supports Processor System Bus (PSB) frequencies of 400 MHz

(100 MHz bus clock) and 533 MHz (133 MHz bus clock). This is the same as the 82845G.

Figure 9-1. Intel® 845GL/845GV Chipset System Block Diagram

Intel® 82801DB

I/O Controller Hub 4

(ICH4)

1.6 / 2.1 GB/s

PCI Bus

Intel® 82845GL/

82845GV

Graphics and

Memory Controller

Hub (GMCH)

Hub

Interface

6 USB Ports,

3UHCI, 1 EHCI

UltraATA/100

AC '97 Codec(s)

(optional)

AC'97 2.3

LPC I/F

Super I/O

Keyboard,

Mouse, FD, PP,

SP, IR

FWH Flash

BIOS

PCI

Slots

1.06 GB/s

845GL/845GV

Chipset

PCI

Agent

GPIO

LAN Connect

4 IDE Devices

PCI133

SDRAM

System Memory

Interface

SMBus

Devices

DDR-

SDRAM

1.06 GB/s

2 Intel® DVO

Ports

VGA

Debug Port

System Bus

400 MHz,

533 MHz (82845GV only)

Processor

845GL Datasheet(PDF) 181 Page - Intel Corporation

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