A fault diagnosis methodology for the UltraSPARC/sup TM/-I microprocessor

  • Authors:
  • S. Narayanan;R. Srinivasan;R. P. Kunda;M. E. Levitt;S. Bozorgui-Nesbat

  • Affiliations:
  • Sun Microsystems Inc., Mountain View, California;Sun Microsystems Inc., Mountain View, California;Sun Microsystems Inc., Mountain View, California;Sun Microsystems Inc., Mountain View, California;Sun Microsystems Inc., Mountain View, California

  • Venue:
  • EDTC '97 Proceedings of the 1997 European conference on Design and Test
  • Year:
  • 1997

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Abstract

In this paper we study the use of precomputed fault dictionaries to diagnose stuck-at and bridging defects in the UltraSPARC/sup TM/-I processor. In constructing the dictionary we analyze the effect of the dictionary format on parameters such as memory size, computational effort, and diagnostic resolution. The dictionary is built based on modeled stuck-at faults. However to effectively diagnose both stuck-at and bridging faults, we employ a novel procedure that combines dictionary information with potential bridge defects extracted from layout. Experiments with failing devices show excellent correlation of predicted errors with actual defects.