Automated trace signals identification and state restoration for improving observability in post-silicon validation

  • Authors:
  • Ho Fai Ko;Nicola Nicolici

  • Affiliations:
  • McMaster University, Hamilton, ON, Canada;McMaster University, Hamilton, ON, Canada

  • Venue:
  • Proceedings of the conference on Design, automation and test in Europe
  • Year:
  • 2008

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Abstract

Embedded logic analysis has emerged as a powerful technique for identifying functional bugs during post-silicon validation, as it enables at-speed acquisition of data from the circuit nodes in real-time. Nonetheless, the amount of data that is observed is limited by the capacity of the on-chip trace buffers. This paper introduces an automated method for improving the utilization of the on-chip storage, by identifying a small set of trace signals from which a large number of states can be restored using a compute-efficient algorithm. This enlarged set of data can then be used to aid the search of functional bugs in the fabricated circuit.