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Test generation and scheduling for layout-based detection of bridge faults in interconnects

机译:测试生成和调度以基于布局检测互连中的桥故障

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This paper presents a new approach to detecting faults in interconnects; the novelty of the proposed approach is that test generation and scheduling are established using the physical characteristics of the layout of the interconnect under test. This includes critical area extraction and a realistic fault model for a structural methodology. Physical layout information is used to model the adjacencies in an interconnect and possible bridge faults with a weighted graph, which is then analyzed to appropriately compact the tests and schedule their execution for (early) detection of bridge faults. Generation and compaction of the test vectors are accomplished by calculating node and edge weight heuristics from the weighted adjacency graph. Simulation has been performed for unweighted and weighted fault models. Results on random interconnects and the local interconnect of a commercially available field-programmable gate array are provided. The advantage of the proposed approach is that, on average, early detection of faults is possible using significantly fewer tests than with previous approaches. A further advantage is that it represents a realistic alternative to adaptive testing because it avoids costly on-line test generation, while still having a small number of vectors.
机译:本文提出了一种检测互连中故障的新方法。所提出方法的新颖之处在于,利用被测互连的布局的物理特性来建立测试的生成和调度。这包括关键区域提取和用于结构方法的实际故障模型。物理布局信息用于通过加权图对互连中的邻接关系和可能的桥故障建模,然后对其进行分析以适当压缩测试并安排其执行以(早期)检测桥故障。测试向量的生成和压缩是通过从加权邻接图计算节点和边缘权重启发式算法来完成的。已经对未加权和加权故障模型进行了仿真。提供了关于随机互连和市售现场可编程门阵列的局部互连的结果。所提出的方法的优点在于,平均而言,与以前的方法相比,使用明显更少的测试可以早期发现故障。另一个优点是,它代表了自适应测试的现实替代方案,因为它避免了昂贵的在线测试生成,同时仍然具有少量的向量。

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