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Twisted gastrulation (Tsg) and chordin are secreted glycoproteins that function together as BMP (bone morphogenetic protein) antagonists to regulate BMP growth factor signalling. Chordin binds to BMPs, preventing them from interacting with their receptors and Tsg is known to strengthen this inhibitory complex. Tsg also acts as a BMP agonist by promoting cleavage of chordin by tolloid-family proteinases...
We present a new fault data sharing scheme for a multi-core parallel ATPG system. This scheme effectively reduces the memory consumption by putting the fault data in shared memory. We discuss optimization opportunities and the new technical challenges. Experimental results are compared to the original highly efficient multicore ATPG system.
We present a distributed-multicore hybrid ATPG system which leverages the computing power of multiple machines each with multiple CPUs. The system is versatile and scalable and supports flexible configuration. Experimental results are compared to a highly efficient multicore ATPG system.
As scan compression becomes ubiquitous, ever more complex designs require higher compression. This paper presents a novel, two-level compression system for scan input data generated by deterministic test generation. First, load care bits and X-control input data are encoded into PRPG seeds; next, seeds are selectively shared for further compression. The latter exploits the hierarchical nature of large...
Scan testing and scan compression have become key components for reducing test cost. We present a novel technique to increase automatic test pattern generation (ATPG) effectiveness by identifying and exploiting instances of increasingly common “majority gates”. Test generation is modified so that better decision are made and care bits can be reduced. Consequently, test coverage, pattern count and...
Scan testing and scan compression are widely used, but ever more complex designs require higher compression, while the increased density of unknown (X) values reduces effective compression. In this paper, we present a new selector design which blocks all Xs while allowing more observability of non-X scan cells and which requires fewer input control values. Supported by novel test generation algorithms,...
Full scan designs are widely used for their indisputable benefits of predictably high test coverage, diagnosis and debug. However, for high-performance designs the cost of scan - area and delay - is not acceptable and partial scan is used instead. Unfortunately, partial scan significantly increases test generation complexity. We define a structured partial scan design methodology and specific test...
Scan testing and scan compression have become key components for reducing test cost, and most high-compression schemes are based on linear, sequential compressors e.g., pseudo-random pattern generators (PRPG). We present a novel technique to increase PRPG-based compression by modifying test generation so that justification of certain decision nodes is delayed and merged with PRPG seed computation...
To leverage the computing power of multicore machines in ATPG, we developed a highly efficient parallel ATPG system based on dynamic fault partition and shared memory. The system takes advantage of built-in efficiency of parallel search to achieve good performance speedup with no sacrifices in pattern quality or test coverage.
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