19.3 Transition Maximization Techniques for Enhancing the Two-Pattern Fault Coverage of Pseudorandom Test Pattern Generators

  • Authors:
  • B. F. Cockburn;A. L. -C. Kwong

  • Affiliations:
  • -;-

  • Venue:
  • VTS '98 Proceedings of the 16th IEEE VLSI Test Symposium
  • Year:
  • 1998

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Abstract

This paper presents simulation evidence supporting the use of bit transition maximization techniques in the design of hardware test pattern generators (TPGs). Bit transition maximization is a heuristic technique that involves increasing the probability that a bit will change values going from one test pattern to the next. For most of the ISCAS-85 benchmarks and many of the ISCAS- 89 benchmarks bit transition maximization enhances the fault coverage of two-pattern faults such as gate delay faults and CMOS transistor stuck-open faults. It achieves these benefits without reducing the fault coverage with respect to classical stuck-at faults.