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MSP430: Processing of multiple simultaneously occuring external interrupts
Problem:
Can the MSP430 process multiple interrupts simultaneously
within a port group, P1.0 to P1.7 or P2.0 to P2.7 for example,
without missing an interrupt signal? There seems to be only one
multiple source interrupt flag that is seen by the CPU for each
of these ports.
Solution:
Yes, as long as the minimum required interrupt event pulse width
is assured, the MSP430 will never miss an interrupt. These multiple
source interrupt flags remain set even if the interrupt request has
been accepted and serviced, so each flag that was serviced must be
reset within its corresponding interrupt service routine. This
causes the remaining pending interrupts to be recognized by the CPU.
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