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

Cyclone 10GX Differential termination

Greetings all,

we are designing a PCB including the Cyclone 10GX220 and were slightly confused by the datasheet.
We wish to terminate an incoming LVDS pair using the normal 100 Ohm differential termination (the datasheet calls it RD).
Do we still need to calibrate the OCT? Should we still connect an external OCT calibration resistor to the bank's RZQ pin?

Thanks!

  • EngWei_O_Intel's avatar
    EngWei_O_Intel
    5 years ago

    Hi Daniels

    Thanks for your inquiry.

    If you have the OCT enabled for the FPGA, you do not need external termination. There is no calibration needed for Rd OCT.

    Thanks.

    Eng Wei

2 Replies

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

    Hi Daniels

    Thanks for your inquiry.

    If you have the OCT enabled for the FPGA, you do not need external termination. There is no calibration needed for Rd OCT.

    Thanks.

    Eng Wei

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

      Hi Daniel

      I’m glad that your question has been addressed, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you.

      Eng Wei