Forum Discussion

AKuma150's avatar
AKuma150
Icon for New Contributor rankNew Contributor
6 years ago

I am using MAX10 FPGA in my design and i am making JTAGEN pin as NC, because i dont want to use sharing. is it ok? is there any problem?

4 Replies

  • AnandRaj_S_Intel's avatar
    AnandRaj_S_Intel
    Icon for Regular Contributor rankRegular Contributor
    6 years ago

    Hi Arvinda,

    No,

    Intel recommend to pull-up JTAGEN pin to a weak 10-kΩ pull-up.

    If the JTAG pin sharing is not enabled, the JTAGEN pin is a regular I/O pin and JTAG pins function as JTAG dedicated pins.

    To use JTAG pin as dedicated pin, tie the JTAGEN pin to a weak 10-kΩ pull-up

    Reference,

    https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/dp/max-10/pcg-01018.pdf

    Let me know if this has helped resolve the issue you are facing or if you need any further assistance.

    Best Regards,

    Anand

    • AKuma150's avatar
      AKuma150
      Icon for New Contributor rankNew Contributor
      6 years ago

      Hi Anand

      thanks for your reply

      weak pull-up means just need to enable the weak pull-up option for that particular pin right ?

      • AnandRaj_S_Intel's avatar
        AnandRaj_S_Intel
        Icon for Regular Contributor rankRegular Contributor
        6 years ago

        HI Arvinda,

        Yes, jtagen pin has an internal 25-kΩ pull up. but still we required external 10-kΩ pull-up.

        Regards

        Anand