Scan power minimization through stimulus and response transformations

Ozgur Sinanoglu, Alex Orailoglu

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

Abstract

Scan-based cores impose considerable test power challenges due to excessive switching activity during shift cycles. The consequent test power constraints force SOC designers to sacrifice parallelism among core tests, as exceeding power thresholds may damage the chip being tested. Reduction of test power for SOC cores can thus increase the number of cores that can be tested in parallel, improving significantly SOC test application time. In this paper, we propose a scan chain modification technique that inserts logic gates on the scan path. The consequent beneficial test data transformations are utilized to reduce the scan chain transitions during shift cycles and hence test power. We introduce a matrix band algebra that models the impact of logic gate insertion between scan cells on the test stimulus and response transformations realized. As we have successfully modeled the response transformations as well, the methodology we propose is capable of truly minimizing the overall test power. The test vectors and responses are analyzed in an intertwined manner, identifying the best possible scan chain modification, which is realized at minimal area cost. Experimental results justify the efficacy of the proposed methodology as well.

Original languageEnglish (US)
Title of host publicationProceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 04
EditorsG. Gielen, J. Figueras
Pages404-409
Number of pages6
Volume1
DOIs
StatePublished - Jul 12 2004
EventProceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 04 - Paris, France
Duration: Feb 16 2004Feb 20 2004

Other

OtherProceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 04
CountryFrance
CityParis
Period2/16/042/20/04

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Sinanoglu, O., & Orailoglu, A. (2004). Scan power minimization through stimulus and response transformations. In G. Gielen, & J. Figueras (Eds.), Proceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 04 (Vol. 1, pp. 404-409) https://doi.org/10.1109/DATE.2004.1268880