At-Speed Built-in Self-Repair Analyzer for Embedded Word-Oriented Memories

  • Authors:
  • Xiaogang Du;Wu-Tung Cheng

  • Affiliations:
  • -;-

  • Venue:
  • VLSID '04 Proceedings of the 17th International Conference on VLSI Design
  • Year:
  • 2004

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Abstract

CRESTA is a built-in self-repair analyzer (BISRA)used for repair of bit-oriented memories, which canrepair all repairable bit-oriented memories with availablespare resource. This paper enhances CRESTA to supportembedded word-oriented memories. Within each readcycle of at-speed memory BIST, the analyzer is able tohandle multiple-bit failure in a word-oriented memory.Furthermore, to reduce area overhead, the proposedanalyzer is reconfigurable to process all repair strategiesin serial. To cover all repair strategies efficiently, wepropose a branch and bound algorithm to select repairstrategies.