Combinational versus sequential

B

A

C

Clock

• Combinational:

  • Apply fixed inputs A, B
  • Wait for clock edge
  • Observe C
  • Wait for another clock edge
  • Observe C again: C will stay the same

• Sequential:

  • Apply fixed inputs A, B
  • Wait for clock edge
  • Observe C
  • Wait for another clock edge
  • Observe C again: C may be different

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