82801DB Datasheet, PDF (259/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

LAN Controller Registers (B1:D8:F0)
7.1.19
7.1.20
7.1.21
MAX_LAT — Maximum Latency Register
(LAN Controller—B1:D8:F0)
Offset Address: 3Fh
Default Value: 38h
Attribute:
Size:
RO
8 bits
Bit
Description
7:0
Maximum Latency (MAX_LAT) — RO. This field defines how often (in increments of 0.25 µs) the
LAN controller needs to access the PCI bus.
CAP_ID — Capability ID Register
(LAN Controller—B1:D8:F0)
Offset Address: DCh
Default Value: 01h
Attribute:
Size:
RO
8 bits
Bit
Description
7:0
Capability ID (CAP_ID) — RO. Hardwired to 01h to indicate that the Intel^® ICH4’s integrated LAN
controller supports PCI Power Management.
NXT_PTR — Next Item Pointer (LAN Controller—B1:D8:F0)
Offset Address: DDh
Default Value: 00h
Attribute:
Size:
RO
8 bits
Bit
Description
7:0
Next Item Pointer (NXT_PTR) — RO. Hardwired to 00b to indicate that power management is the
last item in the Capabilities list.
Intel^® 82801DB ICH4 Datasheet
259