Forum Discussion

RDiva's avatar
RDiva
Icon for New Contributor rankNew Contributor
5 years ago

I/O Standard

Hello, recently while working on a design with EP4CE30F29I8LN where all our I/O banks were powered to 3.3V and under device and pin options I had selected 3.3-V LVCMOS. However one of the I/O lines...
AminT_Intel's avatar
AminT_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

Hello Divakar,

I see you are using Cyclone IV on your design. Are you referring to Vccio? If yes, the range of Vccio in 3.0-V LVCMOS is from 2.85V to 3.15V. Supplying Vccio of 3.3V on this bank is not recommended since it is above the range and I cannot validate whether it will be safe or not to your device. I would recommend you to follow I/O Standard Specs from Cyclone IV Device Datasheet Table 1-15 page 12: https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-iv/cyiv-53001.pdf .

Thank you.

  • RDiva's avatar
    RDiva
    Icon for New Contributor rankNew Contributor
    5 years ago

    Is there a way I can get current strength greater than 2 mA when selected for 3.3-V LVCMOS

  • RDiva's avatar
    RDiva
    Icon for New Contributor rankNew Contributor
    5 years ago

    Can it damage the device? I see the absolute maximum rating is 3.45.

    • AminT_Intel's avatar
      AminT_Intel
      Icon for Regular Contributor rankRegular Contributor
      5 years ago

      Hello RDiva,

      Unfortunately no. The current strength from the table I shared with you is only from -2mA to 2mA for 3.3V LVCMOS. I am sorry I cannot validate if it will be safe for your device if you set specifications beyond our range from that document. Do you need any more clarification?

      Thank you.

      • AminT_Intel's avatar
        AminT_Intel
        Icon for Regular Contributor rankRegular Contributor
        5 years ago

        Hello RDiva,

        I hope your problems have been solved. I will close this case in 3 days if there is no further questions from you.

        Thank you.