Checking Sequence Generation for Asynchronous Sequential Elements

  • Authors:
  • S. Gören;F. J. Ferguson

  • Affiliations:
  • -;-

  • Venue:
  • ITC '99 Proceedings of the 1999 IEEE International Test Conference
  • Year:
  • 1999

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Abstract

An algorithm for generating checking sequences forasynchronous finite state machines is proposed. Achecking sequence distinguishes a finite state machine(FSM) from all other FSMs with the same inputs andoutputs, and with the same or fewer number of states.This algorithm is applied to normal fundamental modeasynchronous finite state machines (AFSM). The derived checking sequences can be used either as a testsets that detect all logic faults or to verify that the circuit design is a correct implementation of the AFSM.The resulting test is guaranteed to detect all logic faultsoccurring in the machine even if the defect causes alimited number of additional states.