Version Found: DDR3 v7.0
Version Resolved: See (Xilinx Answer 69036)
When simulating a MIG UltraScale DDR3 design using a Micron memory model targeting the sg125 speed grade with CAS Latency = 9 and CAS Write latency = 7, the following error message might be received:
# sim_tb_top.mem_model_x8.memRank[0].memModel[2].u_ddr3_x8.main: at time 6947904.0 ps ERROR: CAS Latency = 9 is illegal @tCK(avg) = 1500.220703
# sim_tb_top.mem_model_x8.memRank[0].memModel[2].u_ddr3_x8.main: at time 6947904.0 ps ERROR: CAS Latency = 9 is not valid when CAS Write Latency = 7
According to the Micron data sheet for the sg125 speed grade, CAS Latency=9 and CAS Write Latency=7 is supported.
Please use the updated Micron Model.
Revision History:
04/01/2015 - Initial Release
| Answer Number | Answer Title | Version Found | Version Resolved |
|---|---|---|---|
| 69036 | UltraScale/UltraScale+ DDR3 - Release Notes and Known Issues | N/A | N/A |
| AR# 63787 | |
|---|---|
| Date | 01/02/2018 |
| Status | Active |
| Type | Known Issues |
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