A technique for fault diagnosis of defects in scan chains
Proceedings of the IEEE International Test Conference 2001
On Compacting Test Response Data Containing Unknown Values
Proceedings of the 2003 IEEE/ACM international conference on Computer-aided design
DATE '03 Proceedings of the conference on Design, Automation and Test in Europe - Volume 1
Compactor Independent Direct Diagnosis
ATS '04 Proceedings of the 13th Asian Test Symposium
X-Masking During Logic BIST and Its Impact on Defect Coverage
ITC '04 Proceedings of the International Test Conference on International Test Conference
ETS '06 Proceedings of the Eleventh IEEE European Test Symposium
Column Parity Row Selection (CPRS) BIST Diagnosis Technique: Modeling and Analysis
IEEE Transactions on Computers
X-Block: An Efficient LFSR Reseeding-Based Method to Block Unknowns for Temporal Compactors
IEEE Transactions on Computers
X-compact: an efficient response compaction technique
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Fault Diagnosis With Convolutional Compactors
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
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In modern scan architecture, it is often desirable to compact the output response without jeopardizing the diagnostic resolution. In this paper, we propose an output masking scheme to meet such a stringent requirement. We consider a practical scenario in which an output compactor is in use. We aim to support the harshest condition called compound defect diagnosis, in which faults exist in both the scan chain and the core logic. To overcome the loss of the diagnostic resolution, we incorporate a split-masking scheme, by which one can easily separate the output responses of the faulty chains from those of the fault-free ones. The experimental results demonstrate that the proposed scheme can recover the diagnostic resolution loss induced by an output compactor almost completely without sacrificing the compaction ratio.