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Altera_Forum's avatar
Altera_Forum
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16 years ago

Epm240t100 Cpld Vccio Voltage Rating

EPM240T100 CPLD VCCIO PIN maximum Voltage is given as 4.6V. Can I connect 5V to VCCIO.

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Do you think, that "Absolute Maximum Ratings" is the right category to answer your question? "Recommended Operating Conditions" syas up to 3.6V. Obviously, MAX II is not a 5.0V tolerant device.

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Epm240t100 Cpld has 2 banks. Each I/O bank has 3 Vccio pins. Is it mandatory to connect all 3Vccio pins of bank to say 3.3V power. Is connecting any 1 of the pin sufficient.

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    --- Quote Start ---

    Is it mandatory to connect all 3Vccio pins of bank

    --- Quote End ---

    Clearly yes.
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    I have connected 16MHz clock to GCLK0 and left other GCLKs 1-3 unconnected. Can I connect them to ground. GCLK0 is programmed as Input. How can i choose this pin to work as Clock or as I/O.