Built-In Self-Test for GHz Embbedded SRAMS Using Flexible Pattern Generator And New Repair Algorithm

  • Authors:
  • Shigeru Nakahara;Keiichi Higeta;Masaki Kohno;Toshiaki Kawamura;Keizo Kakitani

  • Affiliations:
  • -;-;-;-;-

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

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Abstract

This paper presents a built-in self-test (BIST) scheme,which consists of a flexible pattern generator and a practicalon-macro two-dimensional redundancy analyzer, forGHz embedded SRAMs. In order to meet the system requirementsand to detect a wide variety of faults or performancedegradation resulting from recent technologyadvances, the microcode-based pattern generator cangenerate flexible patterns. A practical new repair algorithmfor the Finite State Machine (FSM)-based on-macroredundancy analyzer is also presented. It can beimplemented with simple hardware and can show fairlygood performance compared with conventional software-based algorithms.