2.3.5 Multiple Interrupt Sources
Assume: INT0 is initial Low and active High,
INT1 is initial High and active Low
as below:
INT0 and INT1
are active at the
same time
INT1
INT0
INT1 returns to
normal
INT0 and INT1
return to normal
at the same time
INT1 is active
Refer to DEMO5.C for the source program.
All of these falling-edge and
rising-edge can be detected using DEMO5.C.
Note:
!
When the interrupt is active, the user program has to identify the active
signals. These signals may all be active at the same time, so the interrupt
service routine has to service all active signals at the same time.
PIO-DA/PISO-DA Series User Manual (Ver.2.9, Feb. 2011, PMH-009-29 )
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