82801BA Datasheet, PDF (29/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

Introduction
Introduction
1
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.
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.
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.
Table 1-1. Industry Specifications
Specification
LPC
AC’97
WfM
SMBus
PCI
USB
ACPI
Location
http://developer.intel.com/design/pcisets/lpc/
http://developer.intel.com/pc-supp/platform/ac97/
http://developer.intel.com/ial/WfM/usesite.htm
http://www.sbs-forum.org/specs.htm
http://pcisig.com/specs.htm
http://www.usb.org
http://www.teleport.com/~acpi/
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.
82801BA ICH2 and 82801BAM ICH2-M Datasheet
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