82801BA Datasheet, PDF (30/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

Introduction
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.
1-2
82801BA ICH2 and 82801BAM ICH2-M Datasheet