William Chops Westfield <PICLIST@mitvma.mit.edu> wrote:

> I see that the IoC interrupt is cleared by any IO to the port, and
> my outputs are being driven all the time.  There is even a caveat
> that IoC interrupts may be missed entirely if the transition occurs
> during an IO instruction to the port.  Hmmph.  That doesn't sound
> good.  Does anyone have any experience with how much trouble this
> is likely to be in real life?

    It'll be a lot of trouble; changes are likely to be missed
    completely.  Poll the input pin yourself; don't rely on the
    Interrupt-on-Change input to do anything but wake the part from
    sleep.

    -Andy

=== Andrew Warren -- aiw@cypress.com
=== Principal Design Engineer
=== Cypress Semiconductor Corporation
===
=== Opinions expressed above do not
=== necessarily represent those of
=== Cypress Semiconductor Corporation

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