For the timer circuit shown,the timer accumulated value will reset to zero whenever:
A)input A switch is opened.
B)input A switch is closed.
C)the DN bit is set to 1.
D)the EN bit is set to 1.

Question

For the timer circuit shown,the timer accumulated value will reset to zero whenever: 
A)input A switch is opened. 
B)input A switch is closed. 
C)the DN bit is set to 1. 
D)the EN bit is set to 1.

Quizplus · Accepted Answer

The timer circuit has a Normally Closed (NC) switch connected at input A. When this switch is closed, the timer starts accumulating value. However, when this switch is opened, the timer reset pin is pulled low, causing the accumulated value to reset to zero. Therefore, the best choice for resetting the timer is opening the input A switch.

For the Timer Circuit Shown,the Timer Accumulated Value Will Reset