A generic multi-dimensional scan-control scheme for test-cost reduction

Chia Yi Lin*, Hung-Ming Chen

*Corresponding author for this work

研究成果: Article同行評審

摘要

This paper proposes a generic multi-dimensional scan shift control concept for multiple scan chain design. Multiple scan chain test scheme provides very low scan power by skipping (selectively load/unload) many long scan chain switching activities. Based on the two-dimensional scan shift control, we can achieve low test power with simple and small overhead structure. We can further extend the scheme to a generic N dimension test scheme. The proposed scheme skips many unnecessary don't care (X) patterns to reduce the test data volume and test time. The experimental results of the proposed 2-D scheme achieve significant improvement in shift power reduction, test volume and test time reduction. Compared with traditional single scan chain design, the large benchmark b17 of ITC'99 has over 50% reduction in test data volume and over 40% reduction in test time with little area overhead, around 1% routing overhead, and the power reduction is over 97%.

原文English
頁(從 - 到)1943-1957
頁數15
期刊Journal of Information Science and Engineering
27
發行號6
DOIs
出版狀態Published - 1 十一月 2011

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