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Jens's avatar
Jens
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

Is it not possible to use all clock outputs of an Arria 10 IOPLL

I'm using the 10AX048H4F34E3SG device with 130 LVDS data pairs connected. The LVDS pins are distributed over 6 IO-banks. All pins feed to a GPIO primitive (ddr mode). The clock for the GPIO comes fr...
Jens's avatar
Jens
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

I checked the report (congestion summary in Fitter report) and tried to remove all clocks.
But the error remains. It seems the fitter do not recognize my assignments.

assignment:
-name GLOBAL_SIGNAL OFF -to "deserializer:DESER|sen_pll:SENPLL_6|sen_pll_altera_iopll_181_qprrpya:iopll_0|altera_iopll:altera_iopll_i|twentynm_iopll_ip:twentynm_pll|outclk[3]~CLKENA0"

fitter:
Info (175026): Source: auto-promoted clock driver deserializer:DESER|sen_pll:SENPLL_6|sen_pll_altera_iopll_181_qprrpya:iopll_0|altera_iopll:altera_iopll_i|twentynm_iopll_ip:twentynm_pll|outclk[3]~CLKENA0

What can I do more?

EngWei_O_Intel's avatar
EngWei_O_Intel
Icon for Frequent Contributor rankFrequent Contributor
5 years ago

Hi Jen

Are you able to share you sample design?

Thanks.

Eng Wei

  • EngWei_O_Intel's avatar
    EngWei_O_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    5 years ago

    Hi Jen

    Have you try to use ALTCLKCTRL IP to route your clock to regional clock?

    Thanks.

    Eng Wei

    • Jens's avatar
      Jens
      Icon for Occasional Contributor rankOccasional Contributor
      5 years ago

      Hi Eng Wei,

      no. It seems to me that Quartus have no problem to route the global clock to regional clock. But there are not enough ressorces to connect all PLL outputs in that region.

      Jens

      • EngWei_O_Intel's avatar
        EngWei_O_Intel
        Icon for Frequent Contributor rankFrequent Contributor
        5 years ago

        Hi Jens

        Sorry for late response as I have just back from the extended holiday. Let me take a look on the attached design.

        Thanks.

        Eng Wei

  • Jens's avatar
    Jens
    Icon for Occasional Contributor rankOccasional Contributor
    5 years ago

    Hi Eng Wei

    I made a stripped down version of this project so you can check the quartus errors.

    Jens