Estimating The Distribution Of Fault Latency In A Digital Processor

Author : Mukund Sivaraman
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (376 download)

DOWNLOAD NOW!

Download or read book Delay Fault Coverage written by Mukund Sivaraman and published by . This book was released on 1996 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "In this paper, we propose a new and realistic definition of delay fault coverage, based on the percentage of fabricated faulty chips which can be detected as faulty by a given test set. This metric takes into account the probability distribution of delay fault sizes caused by fabrication process effects. Previously, metrics for the effectiveness of a test set for path delay faults have been based on the percentage of paths tested. Also, gate delay fault test quality and coverage metrics which take into account the size of delay faults, and, in some cases, delay fault size distributions, are limited in scope to only single, localized gate delay defects. Moreover, results which show computationally efficient means of determining gate delay fault coverages using such metrics are lacking. In addition to proposing a realistic delay fault coverage metric, we also present a computationally viable scheme for using this metric to estimate the coverage of any given test set for a class of path delay faults caused by distributed fabrication process variations. We use the results for the ISCAS'89 and Logic synthesis'91 benchmark circuits to demonstrate wide discrepancies between distributed path delay fault coverage estimates for robust test sets obtained using our realistic definition, and the ones obtained by using the traditional notion of coverage as the percentage of paths tested."