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alinave's avatar
alinave
Icon for New Contributor rankNew Contributor
6 years ago

Which Memory Timing information should be used in DDR4 EMIF IP for Stratix 10 if using a higher speed grade memory device at a lower speed - the higher speed grade or the lower speed grade?

Hi, I am setting up the DDR4 controller IP for a device which has a speed bin of 3200 MT/s. However, I would be using that device only for 2400 MT/s. While entering the timing parameters from the de...
sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
6 years ago

No, in the top section of the Mem Timing tab in the parameter editor, you should enter information for the binning of the part, not the speed at which you plan to run it. This sets up the controller and interface for correctly accessing the external memory at any speed it is designed for.

At the bottom of the Mem Timing tab of the parameter editor, you should see some info to enter that is not bin specific. Here and on the other tabs is where you enter info for the speed you'll be running at.

#iwork4intel

  • alinave's avatar
    alinave
    Icon for New Contributor rankNew Contributor
    6 years ago

    Hi sstrell,

    Thanks for that. And I believe that the Memory CAS latency and Memory Write CAS latency settings would depend on the speed at which we are running the core (2400 MT/s in this case). Please correct me if you find that incorrect.

    Thanks,

    Naved