README.odt
1Table for dynamic ODT for DDR4 with PHY generation 2
2====================================================
3Two-slot system
4Only symmetric configurations are supported for interleaving. Non-symmetric
5configurations are possible but not covered here. First slot empty is possbile
6but 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+-----------+-----------+-------------+-------+-------+-------+------+
32