ECE 275: Digital Design I

  1. Truth Table
  2. L M Q Q+
    0 0 0 1
    0 0 1 1
    0 1 0 0
    0 1 1 1
    1 0 0 1
    1 0 1 0
    1 1 0 0
    1 1 1 0
    1. Excitation Table
    Q2 Q1 Q0 Q2+ Q1+ Q0+ L2 L1 L0 M2 M1 M0
    0 0 0 1 1 0 X X X 0 0 1
    0 0 1 X X X X X X X X X
    0 1 0 X X X X X X X X X
    0 1 1 1 0 1 X 1 0 0 X X
    1 0 0 X X X X X X X X X
    1 0 1 0 0 0 1 X 1 X 1 X
    1 1 0 1 1 1 0 0 X X X 0
    1 1 1 0 1 1 1 0 0 X X X
    Q Q+ S R
    0 0 0 X
    0 1 1 0
    1 0 0 1
    1 1 X 0
    1. a. It is a Mealy because Z depends on X (Z = X * Qa) b. Da = X'(Qb) Db = X