EXPLOITING DON'T CARES TO ENHANCE FUNCTIONAL TESTS

  • Authors:
  • Mark W. Weiss;Sharad C. Seth;Shashank K. Mehta;Kent L. Einspahr

  • Affiliations:
  • -;-;-;-

  • Venue:
  • ITC '00 Proceedings of the 2000 IEEE International Test Conference
  • Year:
  • 2000

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Abstract

In simulation based design verification, deterministic or pseudo-random tests are used to check functional correctness of a design. In this paper we presenta technique generating tests by specifying the don't careinputs in the functional specifications so as to improvetheir coverage of both design errors and manufacturingfaults. The don't cares are chosen to maximize sensitization of signals in the circuit. The tests generated in this way require only a fraction of pseudo-exhaustive test patterns to achieve a high multiplicity of fault coverage.