32 lines
2.9 KiB
Plaintext
32 lines
2.9 KiB
Plaintext
Table for dynamic ODT for DDR4 with PHY generation 2
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====================================================
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Two-slot system
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Only symmetric configurations are supported for interleaving. Non-symmetric
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configurations are possible but not covered here. First slot empty is possbile
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but prohibited for simplicity.
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+-----------------------+-------------+---------------+-----------------------------+-----------------------------+
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| Configuration | |DRAM controller| Slot 1 | Slot 2 |
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+-----------+-----------+-------------+-------+-------+--------------+--------------+--------------+--------------+
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| | | | | | Rank 1 | Rank 2 | Rank 1 | Rank 2 |
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| Slot 1 | Slot 2 | Write/Read | Write | Read |-------+------+-------+------+-------+------+-------+------+
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| | | | | | Write | Read | Write | Read | Write | Read | Write | Read |
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+-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | |Rank 1| off | 60 | 240 | off | 60 | 240 | 60 | 60 | 60 | 60 |
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| | |Slot 1|------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | |Rank 2| off | 60 | 60 | 240 | 240 | off | 60 | 60 | 60 | 60 |
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| Dual Rank | Dual Rank |------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | |Rank 1| off | 60 | 60 | 60 | 60 | 60 | 240 | off | 60 | 240 |
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| | |Slot 2|------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | |Rank 2| off | 60 | 60 | 60 | 60 | 60 | 60 | 240 | 240 | off |
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+-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 1 | off | 60 | 80 | off | | | | | | |
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|Single Rank|Single Rank|-------------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 2 | off | 60 | | | | | 80 | off |
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+-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+
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| | | |Rank 1| off | 80 | 80 | off | off | off |
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| Dual Rank | |Slot 1|------+-------+-------+-------+------+-------+------+
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| | | |Rank 2| off | 80 | 80 | off | off | off |
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+-----------+-----------+-------------+-------+-------+-------+------+-------+------+
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|Single Rank| | Slot 1 | off | 80 | 80 | off |
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+-----------+-----------+-------------+-------+-------+-------+------+
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