“…10. As it has been explained in [15], much smaller test data storage results can be achieved if unspecified test cubes are handled. Therefore, we utilize ATPG tool to generate the test sets, and all the unspecified inputs are left unknown.…”
“…10. As it has been explained in [15], much smaller test data storage results can be achieved if unspecified test cubes are handled. Therefore, we utilize ATPG tool to generate the test sets, and all the unspecified inputs are left unknown.…”
“…The lengths of the segments are 5, 7, 6, and 8, respectively. (1,2), (1,4), (2,3), (2,4), (3,4). Since there is no way that the 4 segments can be partitioned into two compatible classes, this test vector has to be scanned in serial mode.…”
Section: Two-way Partitions For Multicastingmentioning
confidence: 99%
“…In the compression architecture shown in Figure 2, a compressed vector is loaded from the automatic test equipment (ATE) into the decompressor, which feeds the decompressed vector into the scan chains. The amount of output response can also be reduced by output compression techniques [3], [4]. Illinois Scan Architecture (ISA) [5], as shown in Figure 3, can efficiently reduce test data volume and test application time.…”
This paper presents a multi-mode segmented scan architecture. Three operation modes are supported: broadcast, multicast, and serial. Efficient test data compression can be achieved under this architecture with limited hardware overhead. An efficient two-way partitioning algorithm is given to construct multicastmode configurations. Finally, we present a layoutaware scan chain routing for test compaction, which has not yet explored by the researchers. Experimental results show that most of the serial scan operations can be replaced by multicast operations, and thus achieve much better compression rate.
“…MISRs are also intolerant to test responses with unknown 'X' values, which arise from uninitialized flip-flop states. Additional circuitry must typically by included to mask off these 'X' values, increasing hardware cost [13].…”
Abstract-The process of detecting logical faults in integrated circuits (ICs) due to manufacturing variations is bottlenecked by the I/O cost of scanning in test vectors and offloading test results. Traditionally, the output bottleneck is alleviated by reducing the number of bits in output responses using XOR networks, or computing signatures from the responses of multiple tests. However, these many-to-one computations reduce test time at the cost of higher detection failure rates, and lower test granularity. In this paper, we propose an output compression approach that uses compressive sensing to exploit the redundancy of correlated outputs from closely related tests, and of correlated faulty responses across many circuits. Compressive sensing's simple encoding method makes our approach attractive because it can be implemented on-chip using only a small number of accumulators. Through simulation, we show that our method can reduce the output I/O bottleneck without increasing failure rates, and can reconstruct higher granularity results off-chip than current compaction approaches.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.