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Altera_Forum's avatar
Altera_Forum
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16 years ago

Use CLKx,DIFFCLK pins in Cyc3 devices as data input pins

CycloneIII Device Family Pin Connection Guidelines says these pins are: Dedicated global clock input pins that can also be used for the

positive terminal inputs for differential global clock input or

user input pins.

Now I wanna use some of these pins as data input pins, will they work?

I doubt because they are not I/O pins but dedicated clock input pins.

2 Replies

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

    --- Quote Start ---

    Hi lanshine,

    Yes, you can use the dedicated clock pins as general purpose inputs, but they cannot be used to drive out.

    As with most questions like this, the easiest way to figure this out is to throw together a quick test design. I often find this quicker than wading through the documentation. :)

    Best regards,

    Stephen

    --- Quote End ---

    to StephenG:

    thanks a lot!!
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    Hi lanshine,

    Yes, you can use the dedicated clock pins as general purpose inputs, but they cannot be used to drive out.

    As with most questions like this, the easiest way to figure this out is to throw together a quick test design. I often find this quicker than wading through the documentation. :)

    Best regards,

    Stephen