Minimized Power Consumption For Scan-Based Bist

  • Authors:
  • Stefan Gerstendörfer;Hans-Joachim Wunderlich

  • Affiliations:
  • -;-

  • Venue:
  • ITC '99 Proceedings of the 1999 IEEE International Test Conference
  • Year:
  • 1999

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Abstract

Power consumption of digital systems may increase significantlyduring testing. In this paper, systems equippedwith a scan-based built-in self-test like the STUMPS architectureare analyzed, the modules and modes with thehighest power consumption are identified, and designmodifications to reduce power consumption are proposed.The design modifications include some gating logic formasking the scan path activity during shifting, and thesynthesis of additional logic for suppressing random patternswhich do not contribute to increase the fault coverage.These design changes reduce power consumptionduring BIST by several orders of magnitude, at very lowcost in terms of area and performance.