Register Description
3.5.1.50
Offset 78h: SHPC_CAPID—SHPC Capability Identifier
Register (D0:F0, F2)
Offset:
Default Value: 0Ch
78h
Attribute: RO
Size: 8 bits
Note: When hot plug is disabled (HPx_SLOT[3] = 0), this register is RESERVED.
Bits
Type
Reset
Description
7:0
RO
0Ch
SHPC Capability ID (CAPID): Used to detect the presence of an SHPC
integrated with a PCI-to-PCI bridge. The SHPC Capability ID must be set to
0Ch.
3.5.1.51
Offset 79h: SHPC_NXTP—SHPC Next Item Pointer Register
(D0:F0, F2)
Offset:
Default Value: 00h
79h
Attribute: RO
Size: 8 bits
Note: When hot plug is disabled (HPx_SLOT[3] = 0), this register is RESERVED.
Bits
Type
Reset
Description
7:0
RO
D8h
Next Capability Pointer (NXTCP): The offset of the next capabilities list item
if not 0.
3.5.1.52
Offset 7Ah: SHPC_DWSEL—SHPC DWORD Select Register
(D0:F0, F2)
Offset:
Default Value: 00h
7Ah
Attribute: RW/RO
Size: 8 bits
This register is used to select the DWORD offset in the SHPC working register set for read and
write by the SHPC software.
Note: When hot plug is disabled (HPx_SLOT[3] = 0), this register is RESERVED.
Bits
Type
Reset
Description
7:0
RW
0
DWORD Select (DWS): Selects the DWORD from the SHPC Working
Register set that is accessible through the DWORD Data register. Accesses to
the DWORD Data register have no effect on the DWORD Select field. A value
of 0 selects the first DWORD of the SHPC Working set. A value of 1 selects
the second DWORD, and so on. This field has a default value of 0.
Intel® 6700PXH 64-bit PCI Hub Datasheet
109
INTEL [ INTEL ]
