Design of Partially Parallel Scan Chain

  • Authors:
  • Yoshinobu Higami;Kozo Kinoshita

  • Affiliations:
  • Department of Applied Physics, Osaka University;Department of Applied Physics, Osaka University

  • Venue:
  • EDTC '97 Proceedings of the 1997 European conference on Design and Test
  • Year:
  • 1997

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Abstract

This paper presents a design-for-testability technique, called partially parallel scan chain ( PPSC ), which aims at reduction of test length for sequential circuits. Since the partially parallel scan chain allows to control and observe subset of flip-flops (FFs) concurrently during scan shift operations, the number of scan shift clocks is reduced.