12th Generation Intel® Core™ Processors Datasheet Volume 2 of 2
ID | Date | Version | Classification |
---|---|---|---|
767625 | 07/13/2023 | Public |
MR4 Rank Temperature (MR4_RANK_TEMPERATURE_0_0_0_MCHBAR) – Offset E424
This register holds the latest MR4 read per rank and used to determine the required refresh rate and thermal conditions of the DRAMs.
Noted: if the register DDR5_1DPC_split_ranks_across_subch is set then: rank_0 -- holds rank0 temperature and rank_3 holds rank1 temperature.
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31:29 | 0h | RO | Reserved |
28:24 | 0x3 | RW/V | Rank 3 (Rank_3) Rank 3 refresh rate (MRC should program the temperature appropriately as the reset default may not apply to all techs: for example LPDDR5 1x ref rate is 0xa) |
23:21 | 0h | RO | Reserved |
20:16 | 0x3 | RW/V | Rank 2 (Rank_2) Rank 2 refresh rate, (MRC should program the temperature appropriately as the reset default may not apply to all techs: for example LPDDR5 1x ref rate is 0xa) |
15:13 | 0h | RO | Reserved |
12:8 | 0x3 | RW/V | Rank 1 (Rank_1) Rank 1 refresh rate, (MRC should program the temperature appropriately as the reset default may not apply to all techs: for example LPDDR5 1x ref rate is 0xa) |
7:5 | 0h | RO | Reserved |
4:0 | 0x3 | RW/V | Rank 0 (Rank_0) Rank 0 refresh rate, (MRC should program the temperature appropriately as the reset default may not apply to all techs: for example LPDDR5 1x ref rate is 0xa) |