12th Generation Intel® Core™ Processor Datasheet Volume 2 of 2
ID | Date | Version | Classification |
---|---|---|---|
767626 | 07/13/2023 | Public |
Power Management Control and Status (PMCS_0_2_0_PCI) – Offset D4
Power Management Control and Status
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
15 | 0x0 | RO | PME Status (PMESTS) This bit is hardwired to 0 to indicate that IGD does not support PME# generation from D3 (cold). |
14:13 | 0x0 | RO | Data Scale (DSCALE) This field is hardwired to 00 to indicate IGD does not support data register. |
12:9 | 0x0 | RO | Data Select (DSEL) This field is hardwired to 0h to indicate IGD does not support data register. |
8 | 0x0 | RO | PME Enable (PMEEN) This bit is hardwired to 0 to indicate that PME# assertion from D3 (cold) is disabled. |
7:2 | 0h | RO | Reserved |
1:0 | 0x0 | RW/V | Power State (PWRSTAT) This field indicates the current power state of the IGD and can be used to set the IGD into a new power state. If software attempts to write an unsupported state to this field, write operation must complete normally on the bus, but the data is discarded and no state change occurs. Behavior of the graphics controller in supported states is detailed in the power management section of the Bspec.Bits[1:0]Power state00:D0Default01:D1Not Supported10:D2Not Supported11:D3 |