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MPC8536 operated DDR3 wrong by CW memory test

Question asked by Joe Zhang on Nov 15, 2016
Latest reply on Nov 20, 2016 by Yiping Wang



Our customer use Codewarrior to debug MPC8536(with 4 pieces DDR3), they found there were 3 pieces DDR were normal, but 1 piece DDR's low 16 bits data value always was 00. Customer wrote data in this DDR's any address, then there were only high 16 bits changed, the low 16 bits still were 00. Customer has 2 pieces PCBA and they are the same status. And the circuit design is from a old design which was normal.

In the picture, the "0000BEEF" were wrong data, and wrote these data by a value which low 16 bits was Non-zero again, found the low 16 bits still were 00.

Please help the check it, thanks a lot!