Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
Clock Status (HfCLKSTS) – Offset 1d14
This register reports the clock status.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31 | 0h | RO/V | HP RING Oscillator Clock Status (HROSCCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 30 | 0h | RO/V | XTAL Oscillator Clock Status (XOSCCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 29 | 0h | RO/V | LP RING Oscillator Clock Status (LPROSCCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 28 | 0h | RO/V | Serial I/O RING Oscillator Clock Status (SIOROSCCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 27 | 0h | RO/V | HS I/O RING Oscillator Clock Status (HSIOROSCCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 26 | 0h | RO/V | Audio PLL Clock Status (APLLCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 25 | 0h | RO/V | Audio Cardinal Clock Status (ACCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 24 | 0h | RO/V | IOSF Sideband Clock Status (IOSFSCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 23 | 0h | RO/V | IOSF Primary Clock Status (IOSFPCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 22 | 0h | RO/V | AON RING Oscillator Clock Status (AONROSCCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 21 | 0h | RO/V | WoV RING Oscillator Clock Status (WOVROSCCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 20 | 0h | RO/V | ACE PLL Clock Status (ACEPLLCS) Indicates the current clock status as a result of CLKCTL clock request. |
| 19:0 | 0h | RO | Reserved (Zero) (RSVD19) SW must use zeros for writes. |