Intel® Core™ Ultra Series 3 Processors CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872351 | 04/14/2026 | 001 | Public |
Device Capabilities (DEVCAP) – Offset 44
Identifies PCI Express device Function specific capabilities.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:29 | 0h | RO | Reserved |
| 28 | 1h | RW | Function Level Reset Capability (FLR) Indicates support for the Function Level reset mechanism. |
| 27:16 | 0h | RO | Reserved |
| 15 | 1h | RO | Role-Based Error Reporting (RBER) Must be Set |
| 14:12 | 0h | RO | Reserved |
| 11:9 | 0h | RO | Endpoint L1 Acceptable Latency (L1LAT) This field is Reserved |
| 8:6 | 0h | RO | Endpoint L0s Acceptable Latency (L0SLAT) This field is Reserved |
| 5 | 1h | RO | Extended Tag Field Supported (ETFS) 8-bit tag field supported |
| 4:3 | 0h | RO | Phantom Functions Supported (PFS) Phantom functions are not supported |
| 2:0 | 2h | RO | Max Payload Size Supported (MPSS) Indicates the maximum payload size that the Function can support for TLPs. (010b = 512 bytes max payload size) |