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BTayl147's avatar
BTayl147
Icon for New Contributor rankNew Contributor
5 years ago
Solved

Timing Analysis False Paths Question

I just had a quick question about False Paths maybe someone could answer? When I generate a report for unconstrained paths and view the "Unconstrained Input Port Paths" I have a report like the picture below.

You can see the paths are not associated with a clock. Is this where you would use False Paths for proper constraining? If not could you point me in the proper direction?

Thanks in advance for the help!

Brandon

  • sstrell's avatar
    sstrell
    5 years ago

    Yes. If these are asynchronous inputs (DIP switches for sure looking at the top of your report), you would false path them:

    set_false_path -from [get_ports DIP_DATA*]

    for example.

    #iwork4intel

2 Replies

  • sstrell's avatar
    sstrell
    Icon for Super Contributor rankSuper Contributor
    5 years ago

    Yes. If these are asynchronous inputs (DIP switches for sure looking at the top of your report), you would false path them:

    set_false_path -from [get_ports DIP_DATA*]

    for example.

    #iwork4intel

    • BTayl147's avatar
      BTayl147
      Icon for New Contributor rankNew Contributor
      5 years ago

      sstrell,

      Thank-you for your help! That's what I will do.

      Have a good day!

      Brandon