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Altera_Forum's avatar
Altera_Forum
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12 years ago

VREFB[1..8]Nx pins as General I/O

Dear sir,

I want to know when & how do we configure VREFB[1..8]N[0..2] pins as General I/O.

Please help

Regards,

Thulasi

1 Reply

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

    You don't have to do anything special to configure them as I/O, just do exactly what you do for other pins.

    However, be aware that these pins have "extra capacitance" on them that makes them a poor choice for high-speed signals.

    In general I select the VREF pins as a last resort, and only use them for input or low speed I/O.

    Cheers,

    Dave