Intel® 400 Series Chipset On-Package Platform Controller Hub
Online Register Database
| ID | Date | Version | Classification |
|---|---|---|---|
| 615146 | 08/09/2019 | 1.2 | Public |
PCI Power Management Control And Status (HECI1_PMCS) – Offset 54
PCI Power Management Control And Status
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 15 | 0b | RW/1C/V | PME Status (PMES) The PME Status bit can be set to '1' by the FW. This bit is cleared by host CPU writing a '1' to it. FW cannot clear this bit. Host CPU writes with value '0' have no effect on this bit. |
| 14:9 | - | - | Reserved
|
| 8 | 0b | RW | PME Enable (PMEE) When set, PME_assert and PME_deassert messages are sent over Sideband to PMC based on the PMES bit. |
| 7:4 | - | - | Reserved
|
| 3 | 1b | RO | No Soft Reset (NSR) This bit indicates that when the controller is transitioning from D3hot to D0 due to power state command, it does not perform and internal reset. |
| 2 | - | - | Reserved
|
| 1:0 | 00b | RW | Power State (PS) This field is used both to determine the current power state of the controller and to set a new power state. The values are: |