Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
Power Management Configuration Reg 4 (PM_CFG4) – Offset 18e8
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 | 0h | RO | Reserved |
| 30 | 0h | RW | USB2 PHY SUS Well Power Gating Enable (U2_PHY_PG_EN) If this bit is 1, dynamic power gating of the USB2 PHY SUS well is enabled. Note: This bit prevents HW from initiating power gating entry. |
| 29 | 1h | RW | Allow Pseudo G3 (ALLOW_PSEUDO_G3) If this bit is 0, PMC will never assert SUSPWRDNACK regardless of any other conditions. |
| 28:0 | 0h | RO | Reserved |