2 System Board

The Input/Output Controller Hub 2 (82801BA)

The Input/Output Controller Hub 2 (82801BA)

The ICH2 is encapsulated in a 360-pin Enhanced Ball Grid Array (EBGA) package and is located on the system board just underneath the AGP connector. It provides the interface between the PCI bridge (PCI Rev. 2.2 compliant with support for 32-bit 33 MHz PCI operations), PCI-to-LPC (Low Pin Count) bridge, IDE controller, USB controller, SMBus controller and Audio Codec ’97 controller.

The ICH2 functions and capabilities are discussed in detail later on in this section. The following figure shows an example of the system block diagram using the ICH2.

Address (36)

Control

Data (64)

Intel Pentium 4

Processor

System Bus

I850 Memory

Controller Hub

(MCH)

Keyboard,

Mouse and

Floppy

Parallel and Serial Ports

2IDE

Connectors

4USB

Connectors

Super I/O

NS 87364

ATA/100 2 Channels

USB

LPC / FWH Link

FirmWare Hub (FWH)

82802AA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I/O Controller Hub

 

 

 

 

 

 

 

(ICH2)(ICH) 82801AA82801BA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IDE

 

 

 

PCI Bridge

 

 

 

 

 

 

Controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CS Audio

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4 x USB

 

 

 

Codec

 

 

 

 

Controller

 

 

 

(CS4280)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DMA

 

 

SM Bus

 

 

 

 

 

Controller

 

 

Controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SMBus

 

 

MaxiLife

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Monitoring

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Chip

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Serial

 

 

 

 

 

 

 

 

 

 

 

 

 

EEPROM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCI Bus (32-bit, 33 MHz)

133 MB/s data transfer rate

Slot 1 - 32-bit/33 MHz

Slot 2- 32-bit/33 MHz

Slot 3 - 32-bit/33 MHz

Slot 4 - 32-bit/33 MHz

Slot 5 - 32-bit/33 MHz

Fans

LCD

Status

Panel

42

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Image 42
HP XU700 manual Input/Output Controller Hub 2 82801BA