Test point insertion using functional flip-flops to drive control points

Joon Sung Yang, Nadeau Dostie Benoit, Nur A. Touba

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)


This paper presents a novel method for reducing the area overhead introduced by test point insertion. Test point locations are calculated as usual using a commercial tool. However, the proposed method uses functional flip-flops to drive control test points instead of test-dedicated flip-flops. Logic cone analysis that considers the distance and path inversion parity from candidate functional flip-flops to each control point is used to select an appropriate functional flip-flop to drive the control point which avoids adding additional timing constraints. Reconvergence is also checked to avoid degrading the testability. Experimental results indicate that the proposed method significantly reduces test point area overhead and achieves essentially the same fault coverage as the implementations using dedicated flip-flops driving the control points.

Original languageEnglish
Title of host publicationInternational Test Conference, ITC 2009 - Proceedings
Publication statusPublished - 2009 Dec 15
EventInternational Test Conference, ITC 2009 - Austin, TX, United States
Duration: 2009 Nov 12009 Nov 6

Publication series

NameProceedings - International Test Conference
ISSN (Print)1089-3539


ConferenceInternational Test Conference, ITC 2009
Country/TerritoryUnited States
CityAustin, TX

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Applied Mathematics


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