Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
Power Management / Clock Capability (HfPMCCAP) – Offset 1d00
This register declares the capabilities of the power management and clock controls unit.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:28 | 0h | RO | Reserved (Zero) (RSVD31) SW must use zeros for writes. |
| 27:26 | 1h | RO | ML Power Gating (MLPG) Indicates the number of power gated domain implemented. |
| 25 | 0h | RO | DSP-HP-x Power Gating Extension (DSPHPPGE) With DSPHPPG as LSBs, it indicates the number of power gated domain implemented. |
| 24 | 1h | RO | HST Power Gating (HSTPG) Indicates the number of power gated domain implemented. |
| 23 | 1h | RO | HUB-HP Power Gating (HUBHPPG) Indicates the number of power gated domain implemented. |
| 22:20 | 2h | RO | IOx Power Gating (IOPG) Indicates the number of power gated domain implemented. |
| 19 | 0h | RO | DSP-ULP Power Gating (DSPULPPG) Indicates the number of power gated domain implemented. |
| 18:16 | 3h | RO | DSP-HP-x Power Gating (DSPHPPG) With DSPHPPGE as MSB, it indicates the number of power gated domain implemented. |
| 15:8 | 0h | RO | Reserved (Zero) (RSVD15) SW must use zeros for writes. |
| 7 | 1h | RO | Integrated PLL or ROSC Clock (IPLLROSCC) Indicates whether the clock is connected to the ACE IP or not. |
| 6 | 0h | RO | Reserved (Zero) (RSVD6) SW must use zeros for writes. |
| 5 | 1h | RO | WoV RING Oscillator Clock (WOVROSCC) Indicates whether the clock is connected to the ACE IP or not. |
| 4 | 0h | RO | High Speed Serial I/O RING Oscillator Clock (HSIOROSCC) Indicates whether the clock is connected to the ACE IP or not. |
| 3 | 0h | RO | Serial I/O RING Oscillator Clock (SIOROSCC) Indicates whether the clock is connected to the ACE IP or not. |
| 2 | 0h | RO | HP RING Oscillator Clock (HROSCC) Indicates whether the clock is connected to the ACE IP or not. |
| 1 | 1h | RO | Audio PLL Clock (APLLC) Indicates whether the clock is connected to the ACE IP or not. |
| 0 | 0h | RO | Audio Cardinal Clock (ACC) Indicates whether the clock is connected to the ACE IP or not. |