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qwitza's avatar
qwitza
Icon for Occasional Contributor rankOccasional Contributor
22 days ago

SDRAM calibration failed.

Hello, after Enpirion stopped selling some of the parts we used on our board, we had to redesign it. We assembled ten boards, and on two of them, I’m now getting an SDRAM calibration error in U-Boot...
Arm Processor
General
Hps Boot
qwitza's avatar
qwitza
Icon for Occasional Contributor rankOccasional Contributor
17 days ago

Hi Archer_Altera​ ,
thanks a lot for your reply and the great support!
Today I measured all the DQ pins, and on both boards I found two lines with higher impedance. We’ll X-ray the boards to check the connections — maybe you’re right :-)
I’ll post the results here once we have them.
Thanks again!

  • KianHinT_altera's avatar
    KianHinT_altera
    Icon for Frequent Contributor rankFrequent Contributor
    12 days ago

    Hi qwitza​ ,

    Just checking up on this case status? Any pending issues or already found the cause on the 2 boards not working, otherwise we would like to transition this to closure and transition this thread to community discussion.

    Thanks

    Regards

    Kian