piclist 2000\05\30\061628a >
Thread: Multiple IRQ'S ?
face BY : Michael Rigby-Jones email (remove spam text)

If the interrupt signal is likely to be too short to be able to poll in the
ISR, then maybe you could use something like an SR flip flop for each IRQ.
The incomming interrupt would set the output of the flip flop which can be
diode OR'ed to the int pin.  The ISR would have the responsibility of
clearing each flip flop after servicing its interrupt.  With a bit of
cunning (and a resistor or two) you could use the same PIC pin to read and
reset the flip flop.


> {Original Message removed}

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