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bombik's avatar
bombik
Icon for New Contributor rankNew Contributor
1 year ago

clocking GPIO

hello, tell me, I have a question about DE1-SoC. Is it possible to use custom GPIOs as clock output sources? and how? I need a frequency of 13 Mhz. There is also a serious question about the stability of such a frequency.

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6 Replies

  • FvM's avatar
    FvM
    Icon for Super Contributor rankSuper Contributor
    1 year ago
    Hi,
    you can send PLL generated clock to GPIO output. Quartus generates a warning that you don't use dedicated clock output, which should be ignored. Generated clock has stability of DE1-SoC 25 MHz crystal oscillator with some additional jitter.
    • bombik's avatar
      bombik
      Icon for New Contributor rankNew Contributor
      1 year ago

      Thank you for responding. The question now is, do all GPIO pins fit the clock source? If not all, which one is better to use? Now I need 60 Mhz from this contact

  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    Icon for Regular Contributor rankRegular Contributor
    1 year ago

    We sincerely apologize for the inconvenience caused by the delay in addressing your Forum queries. Due to an unexpected back-end issue in our system, your Forum cases, along with others, did not get through as intended. As a result, we have a backlog of cases that we are currently working through one by one.

    Please be assured that we are doing everything we can to resolve this issue as quickly as possible. However, this process will take some time, and we kindly ask for your patience and understanding during this period. The cases will be attended by AE shortly.

    We appreciate your patience and understanding, and we are committed to providing you with the best support possible.

    Thank you for your understanding.


  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    Icon for Regular Contributor rankRegular Contributor
    1 year ago

    Hello Sir,


    I wish to follow up with you, do you have any more concerns on this issue?

    Or do you need more support/help before I close this thread?


    Regards,

    Aqid


  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    Icon for Regular Contributor rankRegular Contributor
    1 year ago

    I hope the previous response was sufficient to help you proceed. As we do not receive any response from you on the previous question/reply/answer that we have provided. Please login to ‘https://supporttickets.intel.com/s/?language=en_US’, view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.