Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Stratix III DDR3 ALTMEMPHY calibration fail

Hi

Does anyone know if Altmemphy failed calibration, does it still get to user mode where I can sent out memory read and write at default latency? or how to disable calibration altogether. The document said you can disable calibration if you are running 400MHz or below but I don't see the option.

Thanks

Victor

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    As far as I remember, the memory controller is stopped when calibration fails. Generally, calibration failure indicates a basic memory interface problem, e.g. missing signals, thus no meaningful operation can be expected in this case. Skip calibration is a simulation option, not available for synthesis.