Example: Design a 3-bit up counter

1. State diagram

current state next state0 000 001 11 001 010 22 010 011 33 011 100 44 100 101 55 101 110 66 110 111 77 111 000 0

2. State-transition table
• Like a truth-table
• State encoding is easy for counters
  • Use count value

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