Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
Host PCI Configuration Hardware Initialization (DW 0) (HfPCICFGHWI0) – Offset 1ca0
This register indicates the PCI function (host root space) HW initialization value initialized by BIOS (if required).
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:24 | 4h | RW/L | Base Class Code (BCC) Initialization value for the PCI configuration BCC register. |
| 23:16 | 3h | RW/L | Sub Class Code (SCC) Initialization value for the PCI configuration SCC register. |
| 15:8 | 0h | RW/L | Programming Interface (PI) Initialization value for the PCI configuration PI register. |
| 7 | 1h | RW/L | Function Level Reset (FLR) Initialization value for the PCI configuration FLR register bit. |
| 6:4 | 1h | RW/L | Interrupt Pin (INTPN) Initialization value for the PCI configuration INTPN[2:0] register bit. |
| 3 | 1h | RW/L | PME Support (PMES) Initialization value for the PCI configuration PMES[4] register bit. |
| 2:0 | 0h | RW/L | Device ID (DID) Initialization value for the PCI configuration DID[2:0] register field. |