Intel® Core™ Ultra Series 3 Processors CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872351 | 04/14/2026 | 001 | Public |
Link Control and Status (LINKCTRLSTS_0_2_0_PCI) – Offset 80
This register provides information on the PCIe link control and status.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:26 | 0h | RO | Reserved |
| 25:20 | 1h | RO | NEGOTIATED LINK WIDTH (NLW) 1 : x1 width10 : x2 width100 : x4 width1000 : x8 width10000 : x16 width |
| 19:16 | 1h | RO | CURRENT LINK SPEED (LINKSPD) 0001b : Gen1 (Supported Link Speeds Vector bit 0)...0110b : 64GT/s (Supported Link Speeds Vector bit 5) |
| 15:8 | 0h | RO | Reserved |
| 7 | 0h | RW/V | EXTENDED SYNC (EXTSYNC) R/W scratch pad (no effect on agent) |
| 6 | 0h | RW/V | COMMON CLK CFG (CCLKCFG) R/W scratch pad (no effect on agent). |
| 5:4 | 0h | RO | Reserved |
| 3 | 0h | RW/V | READ COMP BOUNDARY (RCB) Read Completion Boundary (RCB) - Functions that do not implement this feature must hardware the bit to 0. |
| 2 | 0h | RO | Reserved |
| 1:0 | 0h | RW/V | ASPM CONTROL (ASPMCTRL) R/W scratch pad (no affect on agent). |