82801DB Datasheet, PDF (291/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

LPC Interface Bridge Registers (D31:F0)
LPC Interface Bridge Registers
(D31:F0)
9
The LPC Bridge function of the ICH4 resides in PCI Device 31:Function 0. This function contains
many other functional units, such as DMA and Interrupt controllers, Timers, Power Management,
System Management, GPIO, RTC, and LPC Configuration Registers.
Registers and functions associated with other functional units (USB UHCI, USB EHCI, 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. LPC I/F PCI Configuration Register Address Map (LPC I/F—D31:F0) (Sheet 1 of 2)
Offset
00–01h
02–03h
04–05h
06–07h
08h
09h
0Ah
0Bh
0Eh
40–43h
44h
4E–4Fh
54h
58–5Bh
5Ch
60–63h
64h
68–6Bh
88h
8Ah
90–91h
Mnemonic
Register Name
VID
Vendor ID
DID
Device ID
PCICMD
PCI Command
PCISTA
PCI Device Status
RID
PI
SCC
BCC
Revision ID
Programming Interface
Sub Class Code
Base Class Code
HEADT
Header Type
PMBASE
ACPI Base Address
ACPI_CNTL ACPI Control
BIOS_CNTL BIOS Control
TCO_CNTL TCO Control
GPIO_BASE
GPIO_CNTL
GPIO Base Address
GPIO Control Register
PIRQ[n]_ROUT
SIRQ_CNTL
PIRQ[n]_ROUT
D31_ERR_CFG
PIRQ[A–D] Routing Control
Serial IRQ Control
PIRQ[E–H] Routing Control
Device 31 Error Configuration
D31_ERR_STS Device 31 Error Status
PCI_DMA_C PCI DMA Configuration Registers
Default
8086h
24C0h
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, RO
R/WC, RO
RO
RO
RO
RO
RO
R/W, RO
R/W
R/W
R/W, RO
R/W
R/W
R/W
R/W
R/W
R/W
R/WC
R/W
Intel^® 82801DB ICH4 Datasheet
291