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digital electronics counters
1. Which of the following statements best describes the operation of a synchronous up-/down-counter?
(A): In general, the counter can be reversed at any point in its counting sequence.
(B): The count sequence cannot be reversed, once it has begun, without first resetting the counter to zero.
(C): The counter can be reversed, but must be reset before counting in the other direction.
(D): The counter can count in either direction, but must continue in that direction once started.
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