Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
Power Management Configuration Reg 3 (PM_CFG3) – Offset 18e0
This register contains misc. fields used to configure the PCH's power management behavior.
This register is in multiple power wells and reset domains (see below).
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:29 | 0h | RO | Reserved |
| 28 | 0h | RW | DVFS VOTE (DVFS_VOTE) This bit when set forces PMC to put DVFS into maximum performance mode. |
| 27:18 | 0h | RO | Reserved |
| 17 | 0h | RW | Host Wireless LAN Phy Power Enable (HOST_WLAN_PP_EN) This policy bit is set by Host software when it desires the wireless LAN PHY to be powered in Sx power states for wakes over wireless LAN (WoWLAN). |
| 16 | 0h | RW | Deep-Sx WLAN Phy Power Enable (DSX_WLAN_PP_EN) When set to 1, PMC will keep SLP_WLAN# high in deep-Sx to enable WoWLAN. |
| 15:5 | 0h | RO | Reserved |
| 4 | 0h | RW | Halt Energy Reporting HW Counters with SLP_S0 Assertion (ER_HALT_SLPS0) 0: When this register bit is cleared (or left in its default |
| 3:0 | 0h | RO | Reserved |