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Altera_Forum's avatar
Altera_Forum
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9 years ago

The pin VCCPGM power supply at AS mode

Hi all,

The pin VCCPGM power supply must be 3.0v/3.3v at AS mode in the cyclone v datasheet. why?

I select a 1.8v low voltage flash from cypress. Can I connet VCCPGM pin to 1.8v?

Thanks

Jimmy

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    9 years ago

    as mode is for epcq or epcs shipped by altera. no cypress device. you may miss understand ps or fpp configuration, 2.5 and 1.8v are also available for these configuration mode.

  • Altera_Forum's avatar
    Altera_Forum
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    9 years ago

    --- Quote Start ---

    as mode is for epcq or epcs shipped by altera. no cypress device. you may miss understand ps or fpp configuration, 2.5 and 1.8v are also available for these configuration mode.

    --- Quote End ---

    I replace the epcs with a cypress small outline 3.3v spi flash successfully.

    In order to reduce power cosumption, I plan to use the 1.8v spi flash from cypress now. Can i do it?
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    9 years ago

    I think no. EPCQ-L device runs on 1.8V VCC, but CycloneV doesn't support EPCQ-L, only EPCQ device. If it runs 1.8V VCCPGM, CycloneV will support EPCQ-L devices. So I don't think 1.8V cypress flash work instead of EPCS.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    9 years ago

    --- Quote Start ---

    I think no. EPCQ-L device runs on 1.8V VCC, but CycloneV doesn't support EPCQ-L, only EPCQ device. If it runs 1.8V VCCPGM, CycloneV will support EPCQ-L devices. So I don't think 1.8V cypress flash work instead of EPCS.

    --- Quote End ---

    I use the 1.8v spi flash from cypress at as mode successfully, and it runs 1.8V VCCPGM.

    But I still worry about the reliability.

    How can i get the further help.