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In this paper we propose an observability branch coverage metric (OBCM) based on dynamic factored use-define chains, along with its evaluation method. This technique exploits the efficiency of data-flow analysis rather than methods like fault simulation. Hence it can be easily integrated into HDL compilers or simulators. Experimental results show that OBCM can provide more meaningful coverage data...
We proposed clustered random access scan (CRAS) architecture to reduce test data volume. CRAS makes use of the compatibility of the test stimuli to cluster the scan cells, and assigns every cluster a unique address. The compression ratio upper bound of CRAS is analyzed based on the random graph theory. Experimental results on ISCAS'89 benchmarks and two industry designs show that the proposed CRAS...
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