NDLI: LFSR-based test-data compression with self-stoppable seeds

Content Provider	IEEE Xplore Digital Library
Author	Koutsoupia, M. Kalligeros, E. Kavousianos, X. Nikolos, D.
Copyright Year	2009
Description	Author affiliation: Computer Science Dept., Univ. of Ioannina, Greece (Kavousianos, X.) \|\| Comp. Eng. & Inf. Dept., University of Patras, Greece (Koutsoupia, M.; Nikolos, D.) \|\| Information & Comm. Systems Eng., Dept., Univ. of the Aegean, Greece (Kalligeros, E.)
Abstract	The main disadvantage of LFSR-based compression is that it should be usually combined with a constrained ATPG process, and, as a result, it cannot be effectively applied to IP cores of unknown structure. In this paper, a new LFSR-based compression approach that overcomes this problem is proposed. The proposed method allows each LFSR seed to encode as many slices as possible. For achieving this, a special purpose slice, called stop-slice, that indicates the end of a seed's usage is encoded as the last slice of each seed. Thus, the seeds include by construction the information of where they should stop and, for that reason, we call them self-stoppable. A stop-slice generation procedure is proposed that exploits the inherent test set characteristics and generates stop slices which impose minimum compression overhead. Moreover, the architecture for implementing the proposed technique requires negligible additional hardware overhead compared to the standard LFSR-based architecture. The proposed technique is also accompanied by a seed calculation algorithm that tries to minimize the number of calculated seeds.
Starting Page	1482
Ending Page	1487
File Size	291074
Page Count	6
File Format	PDF
ISBN	9781424437818
ISSN	15301591
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-04-20
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	European Design Automation Association (EDAA)
Subject Keyword	Automatic testing Character generation Circuit testing Phase shifters Automatic test pattern generation Hardware System testing Encoding Equations Computer science
Content Type	Text
Resource Type	Article

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