Intel® Core™ Ultra 200H and 200U Series Processors CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 844345 | 01/29/2025 | 001 | Public |
Device Control 2 (DEVCTRL2_0_2_0_PCI) – Offset 98
This register provides information on the PCIe Device control 2.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:16 | 0h | RO | Reserved |
| 15 | 0h | RO | END-END TLP PREFIX RELATED (TLP) TLB Prefix blocking not supported. |
| 14:13 | 0h | RO | OBFF ENABLE (OBFF) OBFF is not supported |
| 12 | 0h | RW/V | 10-BIT TAG REQUESTER ENABLE (TTRE) This bit in combination with the Extended Tag Field enable bit in the Device control register determines how many tag field bits are permitted. Software should not change the value of this bit while the Function has outstanding NP requests |
| 11 | 0h | RO | Reserved |
| 10 | 0h | RW/V | LTR MECHANISM ENABLE (LTREN) 1b enables upstream points to send LTR messages and downstream ports to process LTR messages. |
| 9:8 | 0h | RO | IDO RELATED (IDOR) ID-based ordering is not used. |
| 7:6 | 0h | RO | ATOMICOP RELATED (AOE) AtomicOps are not supported. |
| 5 | 0h | RO | Reserved |
| 4 | 0h | RW/V | COMPLETION TIMEOUT DISABLE (CTIMEOUTDIS) When set, diables Completion Timeout mechanism. Software is permitted to set or clear this bit at any time. |
| 3:0 | 0h | RW/V | COMPLETION TIMEOUT VALUE (CTOVAL) Functions that support completion Timeout programmability must support the values given below. Values available for Range B (10ms to 250ms) are : 0101b (16ms to 55ms), 0110b (65ms to 210ms). Software is permitted to change the value at any time. For requests pending, hardware is permitted to use either the new or the old value. Default : 0000b (50us to 50ms) .. it is strongly recommended not expire in less than 10ms. |