Intel
82801BA ICH2 Datasheet
7-1
LAN Controller Registers (B1:D8:F0)
LAN Controller Registers (B1:D8:F0)
7
The ICH2 integrated LAN Controller appears to reside at PCI Device 8, Function 0 on the
secondary side of the ICH2’s virtual PCI-to-PCI Bridge (See
Table 5.1.2
). This is typically Bus 1,
but may be assigned a different number depending upon system configuration. The LAN
Controller acts as both a master and a slave on the PCI bus. As a master, the LAN Controller
interacts with the system main memory to access data for transmission or deposit received data. As
a slave, some of the LAN Controller’s control structures are accessed by the host processor to read
or write information to the on-chip registers. The processor also provides the LAN Controller with
the necessary commands and pointers that allow it to process receive and transmit data.
7.1
PCI Configuration Registers (B1:D8:F0)
Note:
Registers that are not shown should be treated as Reserved (See
Section 6.2
for details).
.
NOTE:
Refer to the Specification Update for the value of the Revision ID Register.
Table 7-1. PCI Configuration Map (LAN Controller—B1:D8:F0)
Offset
00–01h
Mnemonic
VID
Register Name/Function
Vendor ID
Default
8086h
Type
RO
02–03h
DID
Device ID
2449h
RO
04–05h
PCICMD
PCI Device Command Register
0000h
R/W
06–07h
PCISTS
PCI Device Status Register
0290h
R/W
08h
REVID
Revision ID
Note 1
RO
0Ah
SCC
Sub Class Code
00h
RO
0Bh
BCC
Base Class Code
02h
RO
0Dh
PMLT
PCI Master Latency Timer
00h
R/W
0Eh
HEADTYP
Header Type
00h
RO
10–13h
CSR_MEM_BASE
CSR Memory-mapped Base Address
0008h
R/W
14–17h
CSR_IO_BASE
CSR I/O-mapped Base Address
0001h
R/W
2C–2Dh
SVID
Subsystem Vendor ID
0000h
RO
2E–2Fh
SID
Subsystem ID
0000h
RO
34h
CAP_PTR
Capabilities Pointer
DCh
RO
3Ch
INT_LN
Interrupt Line
00h
R/W
3Dh
INT_PN
Interrupt Pin
01h
RO
3Eh
MIN_GNT
Minimum Grant
08h
RO
3Fh
MAX_LAT
Maximum Latency
38h
RO
DCh
CAP_ID
Capability ID
01h
RO
DDh
NXT_PTR
Next Item Pointer
00h
RO
DE–DFh
PM_CAP
Power Management Capabilities
FE21h
RO
E0–E1h
PMCSR
Power Management Control/Status
0000h
R/W
E3h
DATA
Data
RO
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