Intel® Core™ Ultra 200H and 200U Series Processors CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 844345 | 01/29/2025 | 001 | Public |
ACT Command Timing (TC_ACT_0_0_0_MCHBAR) – Offset e138
DDR timing constraints related to ACT commands
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 63:40 | 0h | RO | Reserved |
| 39:32 | 8h | RW | ACT to Write CAS Delay - tRCDw (tRCDW) Holds DDR timing parameter tRCDW, which is tRCD for writes in LPDDR5x. |
| 31:30 | 0h | RO | Reserved |
| 29:22 | 8h | RW | ACT to CAS Delay - tRCD (tRCD) Holds DDR timing parameter tRCD. |
| 21:15 | 4h | RW | ACT to ACT Different Bank Group Delay - tRRD_dg (tRRD_dg) Holds DDR timing parameter tRRD. |
| 14:9 | 4h | RW | ACT to ACT Same Bank Group Delay - tRRD_sg (tRRD_sg) Holds DDR timing parameter tRRD/tRRD_L. |
| 8:0 | 10h | RW | Four ACT Window - tFAW (tFAW) Holds DDR timing parameter tFAW (four activates window). In tCK (WCK for LPDDR5) cycles |