Efficient Concurrent Self-Test with Partially Specified Patterns

  • Authors:
  • Michael A. Kochte;Christian G. Zoellin;Hans-Joachim Wunderlich

  • Affiliations:
  • Institut für Technische Informatik, Universität Stuttgart, Stuttgart, Germany 70569;Institut für Technische Informatik, Universität Stuttgart, Stuttgart, Germany 70569;Institut für Technische Informatik, Universität Stuttgart, Stuttgart, Germany 70569

  • Venue:
  • Journal of Electronic Testing: Theory and Applications
  • Year:
  • 2010

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Abstract

Structural on-line self-test may be performed to detect permanent faults and avoid their accumulation in the system. This paper improves existing techniques for concurrent BIST that are based on a deterministic test set. Here, the test patterns are specially generated with a small number of specified bits. This results in very low test length and fault detection latency, which allows to frequently test critical faults. As a consequence, the likelihood of fault accumulation is reduced. Experiments with benchmark circuits show that the hardware overhead is significantly lower than the overhead of the state of the art. Moreover, a case-study on a super-scalar RISC processor demonstrates the feasibility of the method.