Intel 6 SERIES CHIPSET - DATASHEET 01-2011

Datasheet 437
Gigabit LAN Configuration Registers
12.1.5 RID—Revision Identification Register
(Gigabit LAN—D25:F0)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
12.1.6 CC—Class Code Register
(Gigabit LAN—D25:F0)
Address Offset: 09h–0Bh Attribute: RO
Default Value: 020000h Size: 24 bits
12.1.7 CLS—Cache Line Size Register
(Gigabit LAN—D25:F0)
Address Offset: 0Ch Attribute: R/W
Default Value: 00h Size: 8 bits
12.1.8 PLT—Primary Latency Timer Register
(Gigabit LAN—D25:F0)
Address Offset: 0Dh Attribute: RO
Default Value: 00h Size: 8 bits
12.1.9 HT—Header Type Register
(Gigabit LAN—D25:F0)
Address Offset: 0Eh Attribute: RO
Default Value: 00h Size: 8 bits
Bit Description
7:0
Revision ID — RO. See the Intel
®
6 Series Chipset Specification Update for the value
of the RID Register.
Bit Description
23:0
Class Code— RO. Identifies the device as an Ethernet Adapter.
020000h = Ethernet Adapter.
Bit Description
7:0
Cache Line Size — R/W. This field is implemented by PCI devices as a read write field
for legacy compatibility purposes but has no impact on any device functionality.
Bit Description
7:0 Latency Timer (LT) — RO. Hardwired to 0.
Bit Description
7:0
Header Type (HT) — RO.
00h = Indicates this is a single function device.