82801E datasheet(9/84 Pages) INTEL

9 / 84 page

Intel® 82801E C-ICH

Advance Information Datasheet

1.1

Overview

The 82801E C-ICH provides extensive I/O support. Functions and capabilities include:

• PCI Rev 2.2 compliant with support for 33 MHz PCI operations

• PCI slots support up to four Req/Gnt pairs

• Enhanced DMA Controller, Interrupt Controller, and Timer Functions

• Integrated IDE controller supports Ultra ATA100/66/33

• USB host interface with support for two USB ports; one host controller

• Two integrated LAN controllers

• System Management Bus (SMBus) with additional support for I2C devices

• Low Pin Count (LPC) interface

• Firmware Hub (FWH) interface support

• Serial I/O unit containing two UARTs

The 82801E C-ICH incorporates a variety of PCI functions that are divided into two logical

devices (30 and 31) on PCI Bus 0 and one device on Bus 1. Device 30 is the Hub Interface-to-PCI

bridge. Device 31 contains all the other PCI functions, except the LAN controller as shown in

Table 1. The LAN controllers are located on Bus 1.

Table 1.

PCI Devices and Functions

Bus:Device:Function

Function Description

Bus 0:Device 30:Function 0

Hub Interface to PCI Bridge

Bus 0:Device 31:Function 0

PCI to LPC Bridge

(includes: DMA, Timers, compatible interrupt controller, APIC, RTC, SIU,

processor interface control, power management control, system

management control, and GPIO control)

Bus 0:Device 31:Function 1

IDE Controller

Bus 0:Device 31:Function 2

USB Controller

Bus 0:Device 31:Function 3

SMBus Controller

Bus 1:Device 8:Function 0

LAN0 Controller

Bus 1:Device 9:Function 0

LAN1 Controller

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