NH82810 S L7XK Intel, NH82810 S L7XK Datasheet - Page 29
NH82810 S L7XK
Manufacturer Part Number
NH82810 S L7XK
Description
Manufacturer
Intel
Datasheet
1.NH82810_S_L7XK.pdf
(119 pages)
Specifications of NH82810 S L7XK
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3.3.2.
Datasheet
R
CONFIG_DATA Configuration Data Register
I/O Address:
Default Value:
Access:
Size:
CONFIG_DATA is a 32 bit read/write window into configuration space. The portion of configuration
space that is referenced by CONFIG_DATA is determined by the contents of CONFIG_ADDRESS.
31:0
30:24
23:16
15:11
Bit
10:8
7:2
1:0
Bit
31
Configuration Data Window (CDW). If bit 31 of CONFIG_ADDRESS is 1, any I/O reference that falls in
the CONFIG_DATA I/O space will be mapped to configuration space using the contents of
CONFIG_ADDRESS.
Configuration Enable (CFGE).
1 = Enable accesses to PCI configuration space
0 = Disable accesses to PCI configuration space
Reserved (These bits are read only and have a value of 0).
Bus Number. When the Bus Number is programmed to 00h the target of the Configuration Cycle is
either a hub interface agent GMCH or the ICH.
The Configuration Cycle is forwarded to the hub interface if the Bus Number is programmed to 00h
and the GMCH is not the target.
Device Number. This field selects one agent on the PCI bus selected by the Bus Number. When the
Bus Number field is “00” the GMCH decodes the Device Number field. The GMCH is always Device
Number 0 for the Host-Hub interface bridge/DRAM Controller entity and Device Number 1 for the
internal graphics device. Therefore, when the Bus Number =0 and the Device Number=0 or 1 the
internal GMCH devices are selected.
For Bus Numbers resulting in the hub interface configuration cycles the GMCH propagates the Device
Number field as HA[15:11].
Function Number. This field is mapped to HA[10:8] during the hub interface configuration cycles. This
allows the configuration registers of a particular function in a multi-function device to be accessed. The
GMCH ignores configuration cycles to it’s two internal Devices if the function number is not equal to 0.
Register Number. This field selects one register within a particular Bus, Device, and Function as
specified by the other fields in the Configuration Address Register. This field is mapped to HA[7:2]
during the hub interface Configuration cycles.
Reserved.
0CFCh
00000000h
Read/Write
32 bits
Descriptions
Descriptions
Intel
®
82810E (GMCH)
29
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