Using BIST Control for Pattern Generation

  • Authors:
  • Gundolf Kiefer;Hans-Joachim Wunderlich

  • Affiliations:
  • -;-

  • Venue:
  • ITC '97 Proceedings of the 1997 IEEE International Test Conference
  • Year:
  • 1997

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Abstract

A deterministic BIST scheme is presented whichrequires less hardware overhead than pseudo-randomBIST but obtains better or even complete fault coverageat the same time. It takes advantage of the fact thatany autonomous BIST scheme needs a BIST controlunit for indicating the completion of the self-test atleast.Hence, pattern counters and bit counters are alwaysavailable, and they provide information to beused for deterministic pattern generation by someadditional circuitry. This paper presents a systematicway for synthesizing a pattern generator which needsless area than a 32-bit LFSR for random pattern generationfor all the benchmark circuits.