Register Description
Table 3-2. Power Management Register Summary
Address
Offset
Symbol
Register Name
Power Budgeting Register 23
Default
Access
...–374h
PWR_BUDREG2
3
0000h
RO, RW
3.6.2.1
Offset 300h: PWR_ENH_BUDCAP – Power
Budgeting Capability Header Register (D0:F0, F2)
Offset:
Default Value: 00010004h
300 – 303h
Attribute: RO
Size: 32 bits
Refer to Section 7.9.3 of the PCI Express* Base Specification, Revision 1.0a for details.
Bits
Type
Reset
Description
31:20
RO
0
Next Capability Offset (NCAPOFF): This field contains the offset to the next
PCI Express* capability structure or a 000h if no other items exist in the linked
list of capabilities. The 0000h value indicates that this is the last capability.
19:16
15:0
RO
RO
1h
4h
Capability Version (CAPVER): PCI-SIG defined version number that
indicates the version of the capability structure present. Indicates 1.
PCI Express* Extended Capability ID (PEECAPID): PCI-SIG defined
extended capability ID. A value of 0004h indicates power budgeting capability.
3.6.2.2
Offset 304h: PWR_DATSEL – Power Budgeting Data
Select Register (D0:F0, F2)
Offset:
Default Value: 00h
304h
Attribute: RW
Size: 8 bits
This register indexes the Power Budgeting Data reported through the Data register (DATREG,
offset 308h) and selects the DWORD of Power Budgeting Data that should appear in the Data
register.
Bits
Type
Reset
Description
7:0
RW
0h
Data Select (DSEL): This read-write register indexes the Power Budgeting
Data reported through the Data register (DATREG, offset 308h) and selects the
DWORD of Power Budgeting Data that should appear in the Data Register.
Index values for this register start at 0 to select the first DWORD of Power
Budgeting Data; subsequent DWORD’s of Power Budgeting Data are selected
by increasing index values. A value of 0 selects the DWORD data starting at
address 0x314 to appear in the data register at offset 0x308, a value of 1
selects the DWORD data starting at address 0x318 to appear in the in the data
registers at offset 0x308, and so on. Values greater than 23 for this register will
report all zeros in the data register.
126
Intel® 6700PXH 64-bit PCI Hub Datasheet
INTEL [ INTEL ]
