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Diffstat (limited to 'drivers/nxp/ddr/nxp-ddr/README.odt')
| -rw-r--r-- | drivers/nxp/ddr/nxp-ddr/README.odt | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/nxp/ddr/nxp-ddr/README.odt b/drivers/nxp/ddr/nxp-ddr/README.odt new file mode 100644 index 000000000..879630283 --- /dev/null +++ b/drivers/nxp/ddr/nxp-ddr/README.odt @@ -0,0 +1,31 @@ +Table for dynamic ODT for DDR4 with PHY generation 2 +==================================================== +Two-slot system +Only symmetric configurations are supported for interleaving. Non-symmetric +configurations are possible but not covered here. First slot empty is possbile +but prohibited for simplicity. ++-----------------------+-------------+---------------+-----------------------------+-----------------------------+ +| Configuration | |DRAM controller| Slot 1 | Slot 2 | ++-----------+-----------+-------------+-------+-------+--------------+--------------+--------------+--------------+ +| | | | | | Rank 1 | Rank 2 | Rank 1 | Rank 2 | +| Slot 1 | Slot 2 | Write/Read | Write | Read |-------+------+-------+------+-------+------+-------+------+ +| | | | | | Write | Read | Write | Read | Write | Read | Write | Read | ++-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | |Rank 1| off | 60 | 240 | off | 60 | 240 | 60 | 60 | 60 | 60 | +| | |Slot 1|------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | |Rank 2| off | 60 | 60 | 240 | 240 | off | 60 | 60 | 60 | 60 | +| Dual Rank | Dual Rank |------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | |Rank 1| off | 60 | 60 | 60 | 60 | 60 | 240 | off | 60 | 240 | +| | |Slot 2|------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | |Rank 2| off | 60 | 60 | 60 | 60 | 60 | 60 | 240 | 240 | off | ++-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | Slot 1 | off | 60 | 80 | off | | | | | | | +|Single Rank|Single Rank|-------------+-------+-------+-------+------+-------+------+-------+------+-------+------+ +| | | Slot 2 | off | 60 | | | | | 80 | off | ++-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+ +| | | |Rank 1| off | 80 | 80 | off | off | off | +| Dual Rank | |Slot 1|------+-------+-------+-------+------+-------+------+ +| | | |Rank 2| off | 80 | 80 | off | off | off | ++-----------+-----------+-------------+-------+-------+-------+------+-------+------+ +|Single Rank| | Slot 1 | off | 80 | 80 | off | ++-----------+-----------+-------------+-------+-------+-------+------+ |