Exams/2012 q2b

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The state diagram for this question is shown again below.

Exams 2012q2.png

Assume that a one-hot code is used with the state assignment y[5:0] = 000001(A), 000010(B), 000100(C), 001000(D), 010000(E), 100000(F)

Write a logic expression for the signal Y1, which is the input of state flip-flop y[1].

Write a logic expression for the signal Y3, which is the input of state flip-flop y[3].

(Derive the logic equations by inspection assuming a one-hot encoding. The testbench will test with non-one hot inputs to make sure you're not trying to do something more complicated).

Module Declaration

module top_module (
    input [5:0] y,
    input w,
    output Y1,
    output Y3
);

Logic equations for one-hot state transition logic can be derived by looking at in-edges of the state transition diagram.

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