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bibo's avatar
bibo
Icon for New Contributor rankNew Contributor
3 years ago
Solved

MCDMA/PCIe - what is frequency of coreclkout_hip?

Hello, In the user guide, with H-tile types - Gen3x8, application clock or coreclkout_hip frequency = 250 MHz. But I could not verify it in the TA clock report. Instead, I could see "dut|dut|...
  • Wincent_Altera's avatar
    Wincent_Altera
    3 years ago

    Hi,


    I think that indicates the Clock Fmax.
    If you changed the optimization Mode from Balanced to Aggressive Area you can achieve the 500MHz.

    The Fmax specification is based on the fast clock used for serial data.

    The interface Fmax is also dependent on the parallel clock domain which is design dependent and requires timing analysis.

    Hope this clarified.

    Regards,

    Wincent_Intel

bibo's avatar
bibo
Icon for New Contributor rankNew Contributor
3 years ago

Hi,

Sure! This is the PLL configuration

And the system view with clock interfaces

And this is what clock report with the final snapshot

  • clkout of the IOPLL

  • And clock network report

Regards,

TN

Wincent_Altera's avatar
Wincent_Altera
Icon for Regular Contributor rankRegular Contributor
3 years ago

Hi,


I think that indicates the Clock Fmax.
If you changed the optimization Mode from Balanced to Aggressive Area you can achieve the 500MHz.

The Fmax specification is based on the fast clock used for serial data.

The interface Fmax is also dependent on the parallel clock domain which is design dependent and requires timing analysis.

Hope this clarified.

Regards,

Wincent_Intel

  • bibo's avatar
    bibo
    Icon for New Contributor rankNew Contributor
    3 years ago

    Hi,

    Thanks for your clarification.

    So, how could I review the actual clock frequency?

    Regards,

    TN

    • Wincent_Altera's avatar
      Wincent_Altera
      Icon for Regular Contributor rankRegular Contributor
      3 years ago

      Hi,

      The way you review the clock frequency at the first post shall be correct as per mention in the user guide.

      Regards,
      Wincent_Intel

      • bibo's avatar
        bibo
        Icon for New Contributor rankNew Contributor
        3 years ago

        Hi,

        Thanks for your help.

        That means:

        In this case, we could not see the actual clock frequency in the Timing Analysis report, and the only way to know the exact number is by reviewing the code.

        Is that correct?

        Thanks and Regards,

        TN