Microsoft Word - Digital Logic Design v_4_6a

Step 3 – Assign State variables and redraw state diagram

Step 4 – Excitation Input and Output Equation
Note: T= y (xor) y+

Present State Input Next State Excitation Input Output

y 1 y 0 k 1 k 0 y 1 + y 0 + T 1 T 0 Open

0 0 0 0 0 1

0 0 0 1 0 0

0 0 1 0 0 0

0 0 1 1 0 0

0 1 0 0 0 0

0 1 0 1 1 0

0 1 1 0 0 0

0 1 1 1 0 0

1 0 0 0 0 0

1 0 0 1 0 0

1 0 1 0 0 0

1 0 1 1 1 1

1 1 0 0 0 0

1 1 0 1 0 0

1 1 1 0 0 0

1 1 1 1 0 0

(^00 01)
(^11 10)
Note:
All input not shown will move the FSM to Reset State.

00/0

01/0

11/0

00/1

State Assignment

y 1 y 0 State Name

0 0 Reset

0 1 R

1 0 RG

1 1 RGB

y 1 y 0

k 1 k 0 /Open