1*54fd6939SJiyong ParkTable for dynamic ODT for DDR4 with PHY generation 2 2*54fd6939SJiyong Park==================================================== 3*54fd6939SJiyong ParkTwo-slot system 4*54fd6939SJiyong ParkOnly symmetric configurations are supported for interleaving. Non-symmetric 5*54fd6939SJiyong Parkconfigurations are possible but not covered here. First slot empty is possbile 6*54fd6939SJiyong Parkbut prohibited for simplicity. 7*54fd6939SJiyong Park+-----------------------+-------------+---------------+-----------------------------+-----------------------------+ 8*54fd6939SJiyong Park| Configuration | |DRAM controller| Slot 1 | Slot 2 | 9*54fd6939SJiyong Park+-----------+-----------+-------------+-------+-------+--------------+--------------+--------------+--------------+ 10*54fd6939SJiyong Park| | | | | | Rank 1 | Rank 2 | Rank 1 | Rank 2 | 11*54fd6939SJiyong Park| Slot 1 | Slot 2 | Write/Read | Write | Read |-------+------+-------+------+-------+------+-------+------+ 12*54fd6939SJiyong Park| | | | | | Write | Read | Write | Read | Write | Read | Write | Read | 13*54fd6939SJiyong Park+-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+ 14*54fd6939SJiyong Park| | | |Rank 1| off | 60 | 240 | off | 60 | 240 | 60 | 60 | 60 | 60 | 15*54fd6939SJiyong Park| | |Slot 1|------+-------+-------+-------+------+-------+------+-------+------+-------+------+ 16*54fd6939SJiyong Park| | | |Rank 2| off | 60 | 60 | 240 | 240 | off | 60 | 60 | 60 | 60 | 17*54fd6939SJiyong Park| Dual Rank | Dual Rank |------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+ 18*54fd6939SJiyong Park| | | |Rank 1| off | 60 | 60 | 60 | 60 | 60 | 240 | off | 60 | 240 | 19*54fd6939SJiyong Park| | |Slot 2|------+-------+-------+-------+------+-------+------+-------+------+-------+------+ 20*54fd6939SJiyong Park| | | |Rank 2| off | 60 | 60 | 60 | 60 | 60 | 60 | 240 | 240 | off | 21*54fd6939SJiyong Park+-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+ 22*54fd6939SJiyong Park| | | Slot 1 | off | 60 | 80 | off | | | | | | | 23*54fd6939SJiyong Park|Single Rank|Single Rank|-------------+-------+-------+-------+------+-------+------+-------+------+-------+------+ 24*54fd6939SJiyong Park| | | Slot 2 | off | 60 | | | | | 80 | off | 25*54fd6939SJiyong Park+-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+ 26*54fd6939SJiyong Park| | | |Rank 1| off | 80 | 80 | off | off | off | 27*54fd6939SJiyong Park| Dual Rank | |Slot 1|------+-------+-------+-------+------+-------+------+ 28*54fd6939SJiyong Park| | | |Rank 2| off | 80 | 80 | off | off | off | 29*54fd6939SJiyong Park+-----------+-----------+-------------+-------+-------+-------+------+-------+------+ 30*54fd6939SJiyong Park|Single Rank| | Slot 1 | off | 80 | 80 | off | 31*54fd6939SJiyong Park+-----------+-----------+-------------+-------+-------+-------+------+ 32