Static Test Compaction for Full-Scan Circuits Based on Combinational Test Sets and Non-Scan Sequential Test Sequences

  • Authors:
  • Irith Pomeranz;Sudhakar M. Reddy

  • Affiliations:
  • -;-

  • Venue:
  • VLSID '03 Proceedings of the 16th International Conference on VLSI Design
  • Year:
  • 2003

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Abstract

We propose a new static compaction procedure for scancircuits that generates a test set with a reduced test applicationtime. The proposed procedure combines the advantagesof two earlier static compaction procedures, one thattends to generate large numbers of tests with short primaryinput sequences, and one that tends to generatesmall numbers of tests with long primary input sequences.The proposed procedure starts from a test set with a largenumber of tests and long primary input sequences, and itselects a subset of the tests and subsequences of their primaryinput sequences. It thus has the flexibility of findingan appropriate balance between the number of tests andthe lengths of the primary input sequences in order tominimize the test application time.