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xytech's avatar
xytech
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5 years ago
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Setting 100ohm input on-chip differential termination in Pin planner or Assignment Editor in Quatus?

Hi there ,we use Arria 10 GX device to receive LVDS data , and also use GXB RX lanes in high-speed communication.

For LVDS IO inputs, GXB RX data inputs and GXB ref-clocks, we all need to set on-chip 100ohm differential termination. (no external resistors on board).

I check the A10-GPIO-handbook(section 5.5) and ug01143-XCVR-PHY user guide, seems that in Quartus Prime , both Pin planner or Assignment Editor can set 100 diff-terminations.

So what's the exact differences between Pin planner and Assignment Editor ? Should I use either of these two tools?

PS: Edit qsf file with correct syntax should also be feasible to achieve our goal, but the ablve questions are about Quartus Prime 17.1 software GUI.

Thanks very much!

  • Hello,

    Assignment editor is the tool for assigning various pins. Pin Planner is special tool for pin assignments that include a panorama of pins and it is really helpful for more advanced designs since it you can see where are you assigning the pins.

    Thank you.

5 Replies

    • sstrell's avatar
      sstrell
      Icon for Super Contributor rankSuper Contributor

      You can set the assignment in either the Pin Planner or the Assignment Editor or write directly in the .qsf. They all do the same thing.

      • xytech's avatar
        xytech
        Icon for Contributor rankContributor

        Hi,

        since we can do the assignment in either Pin Planner or the Assignment Editor, why do these two tools exist at the same time? What is their difference? Thanks.