12th Generation Intel® Core™ Processors Datasheet Volume 2 of 2
ID | Date | Version | Classification |
---|---|---|---|
767625 | 07/13/2023 | Public |
Power Management Capabilities (PM_CAPID) – Offset D0
The Power Management Capabilities register is a read-only register which provides information on the capabilities of the function related to power management.
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31:27 | 0x0 | RO | PME Support (PME_SUPPORT) This field indicates the power states in which the device may assert PME#. It is hardwired to 0 to indicate that the device does not support nor assert the PME# signal. |
26 | 0x0 | RO | (D2) Hardwired to 0 to indicate that the D2 power management state is not supported. |
25 | 0x0 | RO | (D1) Hardwired to 0 to indicate that the D1 power management state is not supported. |
24:22 | 0h | RO | Reserved |
21 | 0x0 | RO | Device Specific Initialization (DEVICE_SPECIFIC_INITIALIZATION) Indicates whether special initialization of this function is required (beyond the standard PCI configuration header) before the generic class device driver is able to use it. |
20 | 0h | RO | Reserved |
19 | 0x0 | RO | PME Capability (PME_CAPABILITY) When this bit is set, it indicates that the function relies on the presence of the PCI clock for PME# operation. |
18:16 | 0x3 | RO | (VERSION) This device complies with revision 1.2 of the PCI Power Management Interface Specification. |
15:8 | 0x0 | RO | Next Capability Pointer (NEXT_CAPABILITY_POINTER) This field is hardwired to 00h, indicating the end of the capabilities linked list. |
7:0 | 0x1 | RO | Capability ID (CAPABILITY_ID) 01h indicates that this is a power management capability. |