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Disappeaed a result of DDR Calibration test

Question asked by ko-hey on Feb 2, 2020
Latest reply on Feb 28, 2020 by gusarambula
Branched to a new discussion

Hi all,


My customer evaluate their board and try to fix DDR calibration values.

They tried several times in some boards and found some results is disappeared in calibration test.

i.MX 6/7 DDR Stress Test Tool  


As you can see in calibration_ubnormal.txt, the test result of "loop ABS offset to get HW_DG_LOW" is lack.



Is there any reason of the result ?



Is there any possibility of somethings is wrong with the board ?