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Recursive Pseudo-Exhaustive Two-Pattern Generation

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3 Author(s)
Voyiatzis, I. ; Dept. of Inf., Technol. Educ. Inst. of Athens, Athens, Greece ; Gizopoulos, D. ; Paschalis, A.

Pseudo-exhaustive pattern generators for built-in self-test (BIST) provide high fault coverage of detectable combinational faults with much fewer test vectors than exhaustive generation. In (n, k)-adjacent bit pseudo-exhaustive test sets, all 2k binary combinations appear to all adjacent k-bit groups of inputs. With recursive pseudoexhaustive generation, all (n, k)-adjacent bit pseudoexhaustive tests are generated for k ?? n and more than one modules can be pseudo-exhaustively tested in parallel. In order to detect sequential (e.g., stuck-open) faults that occur into current CMOS circuits, two-pattern tests are exercised. Also, delay testing, commonly used to assure correct circuit operation at clock speed requires two-pattern tests. In this paper a pseudoexhaustive two-pattern generator is presented, that recursively generates all two-pattern (n, k)-adjacent bit pseudoexhaustive tests for all k ?? n. To the best of our knowledge, this is the first time in the open literature that the subject of recursive pseudoexhaustive two-pattern testing is being dealt with. A software-based implementation with no hardware overhead is also presented.

Published in:

Very Large Scale Integration (VLSI) Systems, IEEE Transactions on  (Volume:18 ,  Issue: 1 )

Date of Publication:

Jan. 2010

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