Mumbai University > COMPS > Sem 3 > Digital Logic Design and Analysis

Marks: 9 M

Year: Dec 14

State Table:

• Representation of state machine using relationship between input(s) present state, next state, and the output(s) in the tabular format is know as the State Table.
• Following Fig(b) shows the state table for state diagram shown in Fig(a).

$$\text{Fig State diagram for mealy circuit}$$

$$\text{Fig. (b) State Table for Mealy Circuit}$$

• It represent relationship between input, output and Flip Flop states.
• It contain three sections labelled as

1. Present State
2. Next State
3. Output

• Present state designates the state of flip flop before the occurrence of a clock pulse.
• The next state designates the state of flip-flops after the application of clock pulse.
• And output section gives the value of output variable during the present state.
• Both the next state and output section have two columns representing two possible input conditions: x=0 and x=1.

• In case of Moore Circuit, the output section has only one column since output does not depend on input.

  The table shows the state table for Moore Circuit whose state diagrams is shown in Fig. (C).