82801DB Datasheet, PDF (451/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

SMBus Controller Registers (D31:F3)
SMBus Controller Registers (D31:F3) 13
13.1 PCI Configuration Registers (SMBUS—D31:F3)
Note: Registers that are not shown in Table 13-1 should be treated as Reserved (See Section 6.2 for
details).
Table 13-1. SMBus Controller PCI Configuration Register Address Map (SMBUS—D31:F3)
Offset
00–01h
02–03h
04–05h
06–07h
08h
09h
0Ah
0Bh
20–23h
2C–2Dh
2E–2Fh
3Ch
3Dh
40h
Mnemonic
Register Name
VID
DID
CMD
STA
RID
PI
SCC
Vendor ID
Device ID
Command Register
Device Status
Revision ID
Programming Interface
Sub Class Code
BCC
SMB_BASE
SVID
Base Class Code
SMBus Base Address
Subsystem Vendor ID
SID
INTR_LN
INTR_PN
Subsystem ID
Interrupt Line
Interrupt Pin
HOSTC Host Configuration
Default
Type
8086
24C3h
0000h
0280h
See Note
00h
05h
RO
RO
R/W, RO
R/WC, RO
RO
RO
RO
0Ch
RO
00000001h
R/W
00h
RO
00h
RO
00h
R/W
02h
RO
00h
R/W
NOTE: Refer to the ICH4 Specification Update for the value of the Revision ID Register.
13.1.1
VID—Vendor Identification Register (SMBUS—D31:F3)
Address:
Default Value:
00–01h
8086h
Attribute:
Size:
RO
16 bits
Bit
Description
15:0 Vendor Identification Value — RO. This is a 16-bit value assigned to Intel
13.1.2
DID—Device Identification Register (SMBUS—D31:F3)
Address:
Default Value:
02–03h
24C3h
Attribute:
Size:
RO
16 bits
Bit
15:0 Device Identification Value — RO.
Description
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