| Pankaj Gupta | c518de4 | 2020-12-09 14:02:39 +0530 | [diff] [blame] | 1 | Table for dynamic ODT for DDR4 with PHY generation 2 |
| 2 | ==================================================== |
| 3 | Two-slot system |
| 4 | Only symmetric configurations are supported for interleaving. Non-symmetric |
| 5 | configurations are possible but not covered here. First slot empty is possbile |
| 6 | but prohibited for simplicity. |
| 7 | +-----------------------+-------------+---------------+-----------------------------+-----------------------------+ |
| 8 | | Configuration | |DRAM controller| Slot 1 | Slot 2 | |
| 9 | +-----------+-----------+-------------+-------+-------+--------------+--------------+--------------+--------------+ |
| 10 | | | | | | | Rank 1 | Rank 2 | Rank 1 | Rank 2 | |
| 11 | | Slot 1 | Slot 2 | Write/Read | Write | Read |-------+------+-------+------+-------+------+-------+------+ |
| 12 | | | | | | | Write | Read | Write | Read | Write | Read | Write | Read | |
| 13 | +-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+ |
| 14 | | | | |Rank 1| off | 60 | 240 | off | 60 | 240 | 60 | 60 | 60 | 60 | |
| 15 | | | |Slot 1|------+-------+-------+-------+------+-------+------+-------+------+-------+------+ |
| 16 | | | | |Rank 2| off | 60 | 60 | 240 | 240 | off | 60 | 60 | 60 | 60 | |
| 17 | | Dual Rank | Dual Rank |------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+ |
| 18 | | | | |Rank 1| off | 60 | 60 | 60 | 60 | 60 | 240 | off | 60 | 240 | |
| 19 | | | |Slot 2|------+-------+-------+-------+------+-------+------+-------+------+-------+------+ |
| 20 | | | | |Rank 2| off | 60 | 60 | 60 | 60 | 60 | 60 | 240 | 240 | off | |
| 21 | +-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+ |
| 22 | | | | Slot 1 | off | 60 | 80 | off | | | | | | | |
| 23 | |Single Rank|Single Rank|-------------+-------+-------+-------+------+-------+------+-------+------+-------+------+ |
| 24 | | | | Slot 2 | off | 60 | | | | | 80 | off | |
| 25 | +-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+ |
| 26 | | | | |Rank 1| off | 80 | 80 | off | off | off | |
| 27 | | Dual Rank | |Slot 1|------+-------+-------+-------+------+-------+------+ |
| 28 | | | | |Rank 2| off | 80 | 80 | off | off | off | |
| 29 | +-----------+-----------+-------------+-------+-------+-------+------+-------+------+ |
| 30 | |Single Rank| | Slot 1 | off | 80 | 80 | off | |
| 31 | +-----------+-----------+-------------+-------+-------+-------+------+ |