Code Composer Studio $-$ Assembly Code $-$ MSP$430$

You might have encountered the issue of bouncing buttons in Quiz $6$: You press the

button only once, but the button breaks and re$-$establishes contact while you are

pressing it$,$ resulting in following voltage pattern on the pin.

As a result, what you perceive as one button press triggers two interrupts due to two

falling or raising edges. One way to prevent this from happening is to include a call to

the subroutine delay from the ISR, say after clearing the interrupt flag. Why does this

approach work? Give a short but precise answer that explains what happens at the

register level.