handling multiple interrupt sources?
Started by ●March 27, 2005
Reply by ●April 8, 20052005-04-08
I think the retriggering was coming from the unconnected side of the
flip-flop (74HCT109). It may well have been the 123 as well. Anyway,
with both sides connected, the retriggering seems to be solved.
I am testing it right now.
Thanks again for your expertise!
-TOny
--- In basicx@basi..., "Don Kinzer" <dkinzer@e...> wrote:
>
> --- In basicx@basi..., "tombhandley" <gr13tbs@c...> wrote:
> > connect any unused Inputs to Ground or VCC depending on the
> > logic family.
>
> Some logic families should not have their inputs tied to Vcc.
Rather,
> they need to use a pullup resistor. I know that this caveat applies
to
> the original 74xxx series but not to some later families like 74LS.
> Some engineers use a pullup even though the family doesn't require
it.
> You can share the same pullup among multiple inputs that are being
tied
> high.
>
> Don
