82801DB Datasheet, PDF(251/587 Page) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

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82801DB Datasheet, PDF (251/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

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LAN Controller Registers (B1:D8:F0)

LAN Controller Registers (B1:D8:F0) 7

The ICH4 integrated LAN controller appears to reside at PCI Device 8, Function 0 on the

secondary side of the ICH4âs virtual PCI-to-PCI Bridge (See Section 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 controllerâs 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).

.

Table 7-1. LAN Controller PCI Configuration Register Address Map

(LAN ControllerâB1:D8:F0)

Offset

00â01h

02â03h

04â05h

06â07h

08h

0Ah

0Bh

0Dh

0Eh

10â13h

14â17h

2Câ2Dh

2Eâ2Fh

34h

3Ch

3D

3E

3F

DCh

DDh

DEâDFh

E0âE1h

E3

Mnemonic

Register Name

VID

DID

PCICMD

PCISTS

REVID

SCC

BCC

PMLT

HEADTYP

CSR_MEM_BASE

CSR_IO_BASE

SVID

SID

CAP_PTR

INT_LN

Vendor ID

Device ID

PCI Device Command Register

PCI Device Status Register

Revision ID

Sub Class Code

Base Class Code

PCI Master Latency Timer

Header Type

CSR Memory-Mapped Base Address

CSR I/O-Mapped Base Address

Subsystem Vendor ID

Subsystem ID

Capabilities Pointer

Interrupt Line

INT_PN

MIN_GNT

MAX_LAT

CAP_ID

NXT_PTR

PM_CAP

Interrupt Pin

Minimum Grant

Maximum Latency

Capability ID

Next Item Pointer

Power Management Capabilities

PMCSR

Power Management Control/Status

PCIDATA

PCI Power Management Data

Default

8086h

103Ah

0000h

0290h

See Note

00h

02h

00h

00h

0008h

0001h

0000h

0000h

DCh

00h

01h

08h

38h

01h

00h

FE21h

0000h

00h

Type

RO

RO

R/W, RO

R/WC, RO

RO

RO

RO

R/W

RO

R/W, RO

R/W, RO

RO

RO

RO

R/W

RO

RO

RO

RO

RO

RO

R/WC, R/W,

RO

RO

NOTE: Refer to the ICH4 specification update for the value of the Revision ID Register.

IntelÂ® 82801DB ICH4 Datasheet

251

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