Counters

What function will the counter shown below be performing during period "B" on the timing diagram?

A Counting up

B Counting down

C Inhibited

D Loading

ANS:A - Counting up

See the waveform of Q0 - Q3
Its
1000
1001
So its count up.

If D/U is 0 up, else down
(in A: Its loading inputs).

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