Hi Zack,
I've grounded it after not being able to figure out why it keeps
firing. I figured that if it was grounded it couldn't be a hardware
issue. I grounded it via a very short wire.
Thanks,
Richard
--- In AVR-Chat@yahoogroups.com, Zack Widup <w9sz@...> wrote:
>
>
> Hi Richard,
>
> My first thought is that if it's grounded, why are you setting it up
for
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> use in firmware? Why not just disable it?
>
> How is it grounded? Do you have a long circuit trace or wire to ground
> that might be picking up crosstalk from other nearby lines? Is it
> "grounded" through another circuit such as a TTL or CMOS chip?
>
> Zack
>
>
> On Mon, 17 Dec 2007, Richard Cooke wrote:
>
> > Hi Folks,
> >
> > I'll try this question again as my post of Dec 15th didn't receive any
> > replies.
> >
> > What would cause the INT0 to continually fire even if the pin was
> > grounded? I have the set to trigger on rising edge (MCUCR = 0x03) but
> > it will keep triggering. I have also tried to set it to "any logical
> > change" (MCUCR = 0x01) but get the same results.
> >
> > Anybody have any ideas why a pin that is grounded would trigger an
> > interrupt?
> >
> > Thanks,
> >
> > Richard Cooke
> >
>