82801BA datasheet(29/498 Pages) INTEL

29 / 498 page

82801BA ICH2 and 82801BAM ICH2-M Datasheet

1-1

Introduction

The Intel

® 82801BA ICH2 and Intel® 82801BAM ICH2-M are a highly integrated multifunctional

I/O Controller Hubs that provide the interface to the PCI Bus and integrate many of the functions

needed in today’s PC platforms. The 82801BA is intended for desktop applications and the

82801BAM is intended for mobile applications. This datasheet provides a detailed description of

the 82801BA and 82801BAM functions and capabilities including, signals, registers, on-chip

functional units, interfaces, pinout, packaging, electrical characteristics, and testability.

Unless otherwise specified, all non-shaded areas describe the functionality of both components. In

the non-shaded areas, the term "ICH2" refers to both the 82801BA and 82801BAM components.

1.1

About this Document

This datasheet is intended for Original Equipment Manufacturers and BIOS vendors creating

ICH2-based products. This document assumes a working knowledge of the vocabulary and

principles of USB, IDE, AC’97, SMBus, PCI, ACPI, LAN, and LPC. Although some details of

these features are described within this document, refer to the individual industry specifications

listed in Table 1-1 for the complete details.

Chapter 1. Introduction

Chapter 1 introduces the ICH2 and provides information on document organization. This chapter

also describes the key features of the ICH2 and provides a brief description of the major functions.

Chapter 2. Signal Description

Chapter 2 provides a detailed description of each ICH2 signal. Signals are arranged according to

interface and details are provided as to the drive characteristics (Input/Output, Open Drain, etc.) of

all signals.

Chapter 3. Power Planes and Pin States

Chapter 3 provides a complete list of signals, their associated power well, their logic level in each

suspend state, and their logic level before and after reset.

Chapter 4. System Clock Domains

Chapter 4 provides a list of each clock domain associated with the ICH2 in an ICH2-based system.

Shading, as is shown here, indicates differences between the two components. In the shaded areas

ICH2 refers to the 82801BA and ICH2-M refers to the 82801BAM.

Table 1-1. Industry Specifications

Specification

Location

LPC

http://developer.intel.com/design/pcisets/lpc/

AC’97

http://developer.intel.com/pc-supp/platform/ac97/

WfM

http://developer.intel.com/ial/WfM/usesite.htm

SMBus

http://www.sbs-forum.org/specs.htm

PCI

http://pcisig.com/specs.htm

USB

http://www.usb.org

ACPI

http://www.teleport.com/~acpi/

82801BA Datasheet(PDF) 29 Page - Intel Corporation

82801BA Datasheet(HTML) 29 Page - Intel Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL