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lambert_yu's avatar
lambert_yu
Icon for Contributor rankContributor
3 months ago

dynamic configuration issue of fpll from arria 10

Hi, all quartus ip : quartus 191 IP : fpll operation mode : fraction mode For change the frequency of fpll: I modify c0/m/n/k, after configure these register , then use register to r...
JohnT_Altera's avatar
JohnT_Altera
Icon for Regular Contributor rankRegular Contributor
3 months ago

Hi,


Please share the step to duplicate the issue.


  • lambert_yu's avatar
    lambert_yu
    Icon for Contributor rankContributor
    3 months ago

    Hi,

    Just because I could not send our project to you(I have limited authority). I could only present my implementation step.

    1. Configure fpll to one default frequency;

    2. During simulation, use fixed M count, and continue to adjust K count. (gap about 800 us).

    Use same N and C0 count;

    For the dynamic configuration:

    1. configure C0;

    2. configure M

    3, configure N;

    4. configure K

    5. power down to do reset and re-calibration

    Or maybe could you help provide one example, and I could try it at my side, thanks

    Best Regards