Concurrent core test for SOC using shared test set and scan chain disable

  • Authors:
  • Gang Zeng;Hideo Ito

  • Affiliations:
  • Chiba University, Japan;Chiba University, Japan

  • Venue:
  • Proceedings of the conference on Design, automation and test in Europe: Proceedings
  • Year:
  • 2006

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Abstract

A concurrent core test approach is proposed to reduce the test cost of SOC. Multiple cores in SOC can be tested simultaneously by using a shared test set and scan chain disable. Prior to test, the test sets corresponding to cores under test (CUT) are merged by using the proposed merging algorithm to obtain a shared test set with minimum size. During test, the on-chip scan chain disable signal (SCDS) generator is employed to retrieve the original test vectors from the shared test set. The approach is non-intrusive and automatic test pattern generator (ATPG) independent. Moreover, the approach can reduce test cost further by combining with general test compression/decompression technique. Experimental results for ISCAS 89 benchmark circuits have proven the efficiency of the proposed approach.