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An On-Line Algorithm for the Location of Cross Point Faults in Programmable Logic Arrays

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2 Author(s)
Ramanatha, K.S. ; Department of Electrical Engineering, Government B.D.T. College of Engineering ; Biswas, N.N.

An on-line algorithm is developed for the location of single cross point faults in a PLA (FPLA). The main feature of the algorithm is the determination of a fault set corresponding to the response obtained for a failed test. For the apparently small number of faults in this set, all other tests are generated and a fault table is formed. Subsequently, an adaptive procedure is used to diagnose the fault. Functional equivalence test is carried out to determine the actual fault class if the adaptive testing results in a set of faults with identical tests. The large amount of computation time and storage required in the determination, a priori, of all the fault equivalence classes or in the construction of a fault dictionary are not needed here. A brief study of functional equivalence among the cross point faults is also made.

Published in:

Computers, IEEE Transactions on  (Volume:C-32 ,  Issue: 5 )