POIROT1: A Logic Fault Diagnosis Tool and Its Applications

  • Authors:
  • Srikanth Venkataraman;Scott B. Drummonds

  • Affiliations:
  • -;-

  • Venue:
  • ITC '00 Proceedings of the 2000 IEEE International Test Conference
  • Year:
  • 2000

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Abstract

Logic fault diagnosis or fault isolation is the process ofanalyzing the failing logic portions of an integratedcircuit to isolate the cause of failure. Fault diagnosisplays an important role in multiple applications atdifferent stages of design and manufacturing. A logicdiagnosis tool with applicability to a spectrum of logicDFT , ATPG and test strategies including full/almost fullscancircuits with combinational APTG, partial-scan andnon-scan circuits with sequential APTG and to functionalpatterns in general is presented. Novel featuresincorporated into the tool include static and dynamicstructural processing for partial-scan circuits, windowedfault simulation, and diagnostic models for open defectsand cover algorithms for multiple fault diagnosis.Experimental results include simulation results onprocessor functional blocks and silicon results on chipsetsand processors from artificially induced defects andproduction fallout.