Generating Tests for Delay Faults in Nonscan Circuits

  • Authors:
  • Prathima Agrawal;Vishwani Agrawal;Sharad Seth

  • Affiliations:
  • -;-;-

  • Venue:
  • IEEE Design & Test
  • Year:
  • 1993

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Abstract

A delay test method that allows any sequential-circuit test generation program to produce path delay tests for nonscan circuits is presented. Using this method, a given path is tested by augmenting the netlist model of the circuit with a logic block, in which testing for a certain single stuck-at fault is equivalent to testing for a path delay fault. The test sequence for the stuck-at fault performs all the necessary delay fault test functions: initialization, path activation, and fault propagation. Results on benchmarks are presented for nonscan and scan/hold modes of testing.