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i.MX6 DDR3 Write leveling error

Question asked by Toshishisa Sugiyama on Jul 10, 2017
Latest reply on Aug 16, 2017 by Yuri Muhin



I have a question about write leveling error on DDR3 in Hardware Write Leveling Calibration.

There return HW_WL_ERR and during HW write leveling sometimes. It seems calibration stop first DQS calibration and then it didn't go through fine tune.

Are there suspicious to stop fine tune calibration? Do you have a any experience like this?

Attached picture are OK case and NG case.  Left picture is OK case and right picture is NG case.


Best Regards,