Questions

Great! You're working on a Finite State Machine (FSM) design assignment, which involves the following key steps:

✅ Overview of the FSM Design Process

You’ll go through 3 main stages:

1. Translate a System Description → FSM State Diagram

• Read the system description carefully.

• Identify:

  • States (e.g., Idle, Wait, Process, Done)

  • Inputs that cause state transitions

  • Outputs associated with each state (for Moore) or with transitions (for Mealy)

  • Transitions between states based on input conditions

🎯 Goal:

Draw the state diagram, showing:

• States (circles)

• Transitions (arrows labeled with input/output or just input)

• Starting state (with an arrow into it)

2. Convert the State Diagram → Truth Table

Assign binary state codes to each state:

• For example: A = 00, B = 01, C = 10, D = 11

Then for each transition:

• List the current state (present state)

• List the input(s)

• Determine the next state

• Determine the output(s)

🧾 Your table will look like:

3. Derive Boolean Equations & Implement in Logisim

From the truth table:

• Derive Boolean expressions for:

  • Next state logic (flip-flop inputs)

  • Output logic

Use K-maps or Boolean algebra to simplify equations if needed.

Then:

In Logisim:

• Use D flip-flops (or T, JK depending on your design)

• Implement the logic circuits from your Boolean equations

• Connect inputs, flip-flops (for state memory), combinational logic (next state and outputs)

🛠️ Deliverables Likely Expected:

1. State Diagram (drawn neatly, labeled)

2. State Table (truth table)

3. Boolean equations (next state and output logic)

4. Logisim circuit (.circ file or screenshots)

💡 Tips for Success

• Stick to Moore or Mealy model — don’t mix the two

• Minimize the number of states where possible

• Label each signal clearly in Logisim

• Simulate your circuit to test all input/output behavior

If you have the specific system description you're working from, I can help you design the full state diagram, table, Boolean logic, and even a Logisim guide step-by-step. Just share the problem description!