Intel 815 Manuel D’Utilisation

18  

 

â

â

â

â

System Bus (66/100/133 MHz)

PCI Bus

PCI Slots

(ICH=6 Req/Gnt pairs)

815_SysBlk

ISA

Option

2 IDE Ports

Ultra ATA/66 (ICH);

Ultra ATA/100 (ICH2)

2 USB Ports (ICH);

4 USB Ports (ICH2)

USB

USB

I/O Controller Hub

Super

I/O

AC'97

FWH

(Firmware Hub)

Audio Codec

Modem Codec

LAN Option

(for ICH)

Intel

®

Pentium

®

III Processor

or

Intel

®

Celeron™ Processor

AGP Connector

AGP Graphics

Display Cache

(4 MB SDRAM,

133 MHz Only)

Or

System

Memory

GMCH

(Graphics and Memory

Controller Hub)

- Memory Controller

- AGP Contoller

- Graphcs Controller

  - 3D Engine

  - 2D Engine

  - Video Engine

TV

Analog Display

Encoder

64 Bit /

100/133 MHz Only

Digital Video Out

Digital Video Out

LPC

LAN Controller

(ICH2)

 

The 82801AA ICH/82801BA ICH2 functions and capabilites are listed below. Unless otherwise 
specified, the function/capability applies to both ICH and ICH2. 

•  PCI Rev 2.2 compliant with support for 33 MHz PCI operations 
•  ICH supports up to 6 Req/Gnt pairs 
•  Power Management Logic Support 
•  Enhanced DMA Controller, Interrupt Controller & Timer Functions 
•  Integrated IDE controller; ICH supports Ultra ATA/66 (ICH); Ultra ATA/100/66/33 (ICH2) 
•  Integrated LAN Controller (ICH2 only) 
•  USB host interface with support for two USB ports (ICH); Four ports (ICH2)  
•  System Management Bus (SMBus) compatible with most I

2

C devices  

•  AC’97 2.1 Compliant Link for Audio and Telephony CODECs 
•  Low Pin Count (LPC) interface 
•  Firmware* Hub (FWH) interface support  
•  Alert On LAN*  

Figure 2 is a block diagram of the GMCH illustrating the various interfaces and integrated functions. The 
functions and capabilities include: