Intel® Core™ Ultra Processors for H-series and U-series Platforms SOC I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 795260 | 12/14/2023 | 001 | Public |
Device Capabilities (DEVCAP) – Offset 84
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:29 | 0h | RO | Reserved (RSVD1) This is a Reserved Register |
| 28 | 0h | RO | Reserved |
| 27:26 | 0h | RO | Captured Slot Power Limit Scale (SPLS) Hardwired to 0. |
| 25:18 | 0h | RO | Captured Slot Power Limit Value (SPLV) Hardwired to 0. |
| 17:16 | 0h | RO | Reserved (RSVD2) This is a Reserved Register |
| 15 | 0h | RO | Reserved |
| 14 | 0h | RO | Power Indicator Present (PIP) Hardwired to 0. |
| 13 | 0h | RO | Attention Indicator Present (AIP) Hardwired to 0. |
| 12 | 0h | RO | Attention Button Present (ABP) Hardwired to 0. |
| 11:9 | 0h | RO | Endpoint L1 Acceptable Latency (L1CAP) This bit field is defined in the PCI Express spec as RO. |
| 8:6 | 0h | RO | Endpoint L0s Acceptable Latency (L0SCAP) This bit field is defined in the PCI Express spec as RO. |
| 5 | 0h | RO | Extended Tag Field Support (ETCAP) Indicates 5 bit tag supported. |
| 4:3 | 0h | RO | Phantom Functions Supported (PFCAP) Indicates phantom functions not supported. |
| 2:0 | 0h | RO | Max Payload Size Supported (MPCAP) Indicates 128B maximum payload size capability. |