82801BA Datasheet, PDF (263/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

LPC Interface Bridge Registers (D31:F0)
LPC Interface Bridge Registers
(D31:F0)
9
The LPC Bridge function of the ICH2 resides in PCI Device 31:Function 0. This function contains
many other functional units (e.g., DMA and Interrupt Controllers, Timers, Power Management,
System Management., GPIO, RTC, and LPC Configuration Registers).
Registers and functions associated with other functional units (power management, GPIO, USB,
IDE, etc.) are described in their respective sections.
9.1
PCI Configuration Registers (D31:F0)
Note: Registers that are not shown should be treated as Reserved (See Section 6.2 for details).
.
Table 9-1. PCI Configuration Map (LPC I/F—D31:F0)
Offset
00h–01h
Mnemonic
VID
Register Name
Vendor ID
02h–03h
DID
Device ID
04h–05h
06h–07h
08h
09h
0Ah
0Bh
0Eh
40h–43h
44h
4Eh–4Fh
54h
58h–5Bh
5Ch
60h–63h
64h
68h–6Bh
88h
8Ah
90h–91h
A0h–CFh
PCICMD
PCI Command Register
PCISTS
PCI Device Status Register
RID
Revision ID
PI
Programming Interface
SCC
Sub Class Code
BCC
Base Class Code
HEADT
Header Type
PMBASE
ACPI Base Address Register
ACPI_CNTL ACPI Control
BIOS_CNTL BIOS Control Register
TCO_CNTL TCO Control
GPIO_BASE GPIO Base Address Register
GPIO_CNTL GPIO Control Register
PIRQ[n]_ROUT PIRQ[A–D] Routing Control
SIRQ_CNTL Serial IRQ Control Register
PIRQ[n]_ROUT PIRQ[E–H] Routing Control
D31_ERR_CFG Device 31 Error configuration Register
D31_ERR_STS Device 31 Error Status Register
PCI_DMA_C PCI DMA Configuration Registers
Power Management Registers
See Section 9.8.1
Default
8086h
2440h (ICH2)
244Ch (ICH2-M)
000Fh
0280h
See Note
00h
01h
06h
80h
00000001h
00h
0000h
00h
00000001h
00h
80808080h
10h
80808080h
00h
00h
0000h
Type
RO
RO
R/W
R/W
RO
RO
RO
RO
RO
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
82801BA ICH2 and 82801BAM ICH2-M Datasheet
9-1