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Row-linear feedback shift register-column x-masking technique for simultaneous testing of many-core system chips

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6 Author(s)
Wang, W.-C. ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Hsu, C.-Y. ; Li, J. ; Sung, Y.-C.
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This study presents a row-linear feedback shift register-column (RLC) masking technique that is capable of handling many unknowns in the test responses. The proposed technique takes advantage that most unknowns are locally clustered after the test compactor. With three novel masking mechanisms [direct row, direct column and linear feedback shift register (LFSR) column masking], RLC masks all unknowns in test responses using a very short LFSR. Experiments on a real design show that the proposed technique is able to mask up to 7.38% unknowns with only 0.61% fault coverage loss. By providing a very high test response compaction ratio, RLC masking technique enables massive parallel testing of many-core system chips.

Published in:

Computers & Digital Techniques, IET  (Volume:5 ,  Issue: 4 )

Date of Publication:

July 2011

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