0 Replies Latest reply on Jun 21, 2016 6:19 AM by human_being

    DDRx Batch JEDEC results understanding

    human_being

      Hello everyone!

       

      While conducting DDRx batch simulation I have encountered some problems with JEDEC results interpretation. For DQ signals I obtained a "Fail" mark in Monotonic column and some Vref Treshold Multicross. I understand that the Monotonic is "“Fail” if the waveform at the receiver reverses direction while between VILac and VIHac.". I inspect waveform in ocsillocscope and did not find any big reverses in it. Should I consider it seriously? I attach DQ0 write to DRAM with the problem encircled.

       

      Thank you