82801BA datasheet(30/498 Pages) INTEL

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Introduction

1-2

82801BA ICH2 and 82801BAM ICH2-M Datasheet

Chapter 5. Functional Description

Chapter 5 provides a detailed description of the functions in the ICH2. All PCI buses, devices and

functions in this manual are abbreviated using the following nomenclature; Bus:Device:Function.

This datasheet abbreviates buses as B0 and B1, devices as D8, D30 and D31 and functions as F0,

F1, F2, F3, F4, F5 and F6. For example Device 31 Function 5 is abbreviated as D31:F5, Bus 1

Device 8 Function 0 is abbreviated as B1:D8:F0. Generally, the bus number will not be used, and

can be considered to be Bus 0. Note that the ICH2’s external PCI bus is typically Bus 1; however, it

may be assigned a different number depending on system configuration.

Chapter 6. Register, Memory and I/O Address Maps

Chapter 6 provides an overview of the registers, fixed I/O ranges, variable I/O ranges and memory

ranges decoded by the ICH2.

Chapter 7. LAN Controller Registers

Chapter 7 provides a detailed description of all registers that reside in the ICH2’s integrated LAN

Controller. The integrated LAN Controller resides on the ICH2’s external PCI bus (typically Bus 1)

at Device 8, Function 0 (B1:D8:F0).

Chapter 8. Hub Interface to PCI Bridge Registers

Chapter 8 provides a detailed description of all registers that reside in the Hub Interface to PCI

bridge. This bridge resides at Device 30, Function 0 (D30:F0).

Chapter 9. LPC Bridge Registers

Chapter 9 provides a detailed description of all registers that reside in the LPC bridge. This bridge

resides at Device 31, Function 0 (D31:F0). This function contains registers for many different units

within the ICH2 including DMA, Timers, Interrupts, CPU Interface, GPIO, Power Management,

System Management and RTC.

Chapter 10. IDE Controller Registers

Chapter 10 provides a detailed description of all registers that reside in the IDE controller. This

controller resides at Device 31, Function 1 (D31:F1).

Chapter 11. USB Controller Registers

Chapter 11 provides a detailed description of all registers that reside in the two USB controllers.

These controllers reside at Device 31, Functions 2 and 4 (D31:F2/F4).

Chapter 12. SMBus Controller Registers

Chapter 12 provides a detailed description of all registers that reside in the SMBus controller. This

controller resides at Device 31, Function 3 (D31:F3).

Chapter 13. AC’97 Audio Controller Registers

Chapter 13 provides a detailed description of all registers that reside in the audio controller. This

controller resides at Device 31, Function 5 (D31:F5). Note that this section of the datasheet does

not include the native audio mixer registers. Accesses to the mixer registers are forwarded over the

AC-link to the codec where the registers reside.

Chapter 14. AC’97 Modem Controller Registers

Chapter 14 provides a detailed description of all registers that reside in the modem controller. This

controller resides at Device 31, Function 6 (D31:F6). Note that this section of the datasheet does

not include the modem mixer registers. Accesses to the mixer registers are forwarded over the

AC-link to the codec where the registers reside.

Chapter 15. Pinout and Package Information

Chapter 15 provides the ball assignment for the 360 EBGA package. The chapter also provides the

physical dimensions and characteristics of the 360 EBGA package.

Chapter 16. Electrical Characteristics

Chapter 16 provides the AC and DC characteristics including timing diagrams.

Chapter 17. Testability

Chapter 17 provides details about the implementation of test modes on the ICH2.

Index

There are indexes listing registers and register bits.

82801BA Datasheet(PDF) 30 Page - Intel Corporation

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