Chapter 1: Further Sequential logic system

Question 1

What’s the difference between a ripple counter and a synchronous counter

Answer 1

Ripple counters clocked separately from previous output and only count up or down in binary
Synchronous counters have common clock and run in any sequence

Question 2

For a state diagram what is the main sequence?

Answer 2

The required sequence

Question 3

For a state diagram what is an unused state?

Answer 3

States that are not in the main sequence, that feed into the main sequence

Question 4

For a state diagram what is a stuck state?

Answer 4

Unused state that don’t feed into the main program

Question 5

When do stuck states become a problem?

Answer 5

On power up