題組內容

Problem 3: (20 points) Consider the following sequential circuit. 6141549741a62.jpgAssume that the four D-flip-flops are triggered by the same clock signal, the flip-flop propagation delay is 1 ns, the flip-flop setup cime is 2 ns, the input signal X has delay 2 ns, the OR gate has delay 3 ns, and the XOR gate has delay 4 ns.

(c) (5%) Assume the combinational part of the circuit is to be re-implemented by a single read-only memory (ROM). Determine the size of the ROM in terms of 1) the number of words and 2) the bit-width of each word.