An Efficient Test Relaxation Technique for Combinational & Full-Scan Sequential Circuits

  • Authors:
  • Aiman El-Maleh;Ali Al-Suwaiyan

  • Affiliations:
  • -;-

  • Venue:
  • VTS '02 Proceedings of the 20th IEEE VLSI Test Symposium
  • Year:
  • 2002

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Abstract

Reducing test data size is one of the major challenges in testing systems-on-a-chip. This problem can be solved by test compaction and/or compression techniques. Having a partially specified or relaxed test set increases the effectiveness of test compaction and compression techniques. In this paper, we propose a novel and efficient test relaxation technique for combinational and full-scan sequential circuits. The proposed technique is faster than the brute-force test relaxation method by several orders of magnitude. The application of the technique in improving the effectiveness of test compaction and compression is illustrated.