What do they signify Which one is critical for calculating maximum clock frequency of a circuit?
Ans) Set up time constraint implies how late the input signal can arrive before the active edge of the flip-flop. Smaller the set up time, the better. Hold time on the other hand implies how long the value atthe input requires to be held stable after the active edge. Again the smaller the hold time, the better.For estimating maximum clock frequency, set up time is significant.