Counters - Technical MCQs

Q1:

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).