Electronics and Communication Engineering - Digital Electronics

46.
Periodic recharging of the memory cells at regular intervals of 3 to 8 millisecond is required in a
ROM
Static RAM
Dynamic RAM
PLA
Explanation:
No answer description is available. Let's discuss.

47.
The frequency of the driving network connected between pins 1 and 2 of a 8085 chip must be
equal to the desired clock frequency
twice the desired clock frequency
four times the desired clock frequency
eight times the desired clock frequency
Explanation:
No answer description is available. Let's discuss.

48.

Assertion (A): Divide-64 counter is a Mod-64 counter and divides the input frequency by 64

Reason (R): A Mod 64 counter can be obtained by cascading Mod 16 and Mod 4 counters.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true
Explanation:
No answer description is available. Let's discuss.

49.
In number system e.g. 6, a “decade” counter has to recycle to 0 at the sixth count. Which of the connections indicate below will realize this resetting? (a logic “0” at the R inputs resets the counters)
None of these