Versatile BIST: an integrated approach to on-line/off-line BIST

  • Authors:
  • Ramesh Karri;Nilanjan Mukherjee

  • Affiliations:
  • -;-

  • Venue:
  • ITC '98 Proceedings of the 1998 IEEE International Test Conference
  • Year:
  • 1998

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Abstract

Abstract: In this paper we report a versatile BIST approach(VBIST) that targets both off-line and on-line selftest. VBIST uses off-line BIST circuitry for on-line testing aswell. Unlike traditional on-line self test approaches, VBISTdoes not use functional data as test inputs. Rather, VBISTgenerates test patterns and compacts test responses duringthe normal mode of operation. Furthermore, VBIST coordinatesthis generation and application of test patterns andcompaction of test responses with the usage profile of themodules in the design. VBIST entails little additional impacton performance and area of the design (vis-a-vis theperformance and area of a design with off-line BIST). Wevalidated the VBIST approach using the Synopsys BehavioralCompiler as the synthesis framework and by writingsynthesis scripts for incorporating VBIST constraints.