Fast computation of C-MISR signatures

  • Authors:
  • M. Franklin

  • Affiliations:
  • -

  • Venue:
  • ATS '95 Proceedings of the 4th Asian Test Symposium
  • Year:
  • 1995

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Abstract

Cellular automata based signature analyzers are becoming very popular for compressing test responses in built-in self-test applications. Off-line determination of signatures (both good circuit signature and faulty circuit signatures) is a compute-intensive process that involves cycle-by-cycle simulation of the signature analyzer. In this paper, we investigate a technique for speeding up the simulation of cellular automata-based multi-input signature registers (C-MISRs). First, we describe a technique for converting a C-MISR into an equivalent single input circuit. We then present an algorithm for parallelizing the simulation of these single input circuits.