Diagnosis of Scan Cells in BIST Environment

  • Authors:
  • Janusz Rajski;Jerzy Tyszer

  • Affiliations:
  • Mentor Graphics Corp., Wilsonville, OR;Poznan Univ. of Technology, Poznan, Poland

  • Venue:
  • IEEE Transactions on Computers
  • Year:
  • 1999

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Abstract

The paper presents a new fault diagnosis technique for scan-based designs with BIST. It can be used for nonadaptive identification of the scan cells that are driven by erroneous signals. The proposed scheme employs a pseudorandom scan cell selection routine which, in conjunction with a conventional signature analysis and simple reasoning procedure, allows flexible trade-offs between the test application time and the diagnostic resolution.