SAT-based post-processing for regional capture power reduction in at-speed scan test generation

SAT-based post-processing for regional capture power reduction in at-speed scan test generation
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基于 SAT 的后处理,可降低全速扫描测试生成中的区域捕获功率

DOI:
10.1109/ets.2016.7519327
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发表时间:
2016
期刊:
2016 21th IEEE European Test Symposium (ETS)
影响因子:
--
通讯作者:
X. Wen
X. Wen
中科院分区:
--
文献类型:
--
作者:
S. Eggersglüß;K. Miyase;X. Wen

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随着越来越多复杂的低功耗设计技术被应用于现代LSI芯片,以大幅度降低功能功耗,由于与功能功耗相比,测试功耗过高,无故障芯片在生产测试中失败的风险越来越大。然而,现有的低功耗ATPG方法受到严重的测试数据膨胀的影响,并且经常使用不集中的全局测试功耗降低方法。本文提出了一种新的基于优化sat的高速扫描测试生成方法,该方法明确针对在预生成的紧凑测试集中消除高捕获功率测试向量。该方法利用布局信息以集中的区域方式减少捕获切换活动。实验表明,该方法能够有效地消除大量高捕获功率的测试向量,既不会造成测试数据膨胀,也不会造成故障覆盖损失。
With more and more sophisticated low-power design techniques being applied to modern LSI chips for aggressive functional power reduction, the risk of fault-free chips falsely failing production test grows due to excessively high test power compared with functional power. Existing low-power ATPG methods, however, suffer from severe test data inflation and often use unfocused global test power reduction. This paper proposes a novel optimization-SAT-based at-speed scan test generation method that is explicitly targeted at eliminating high-capture-power test vectors in a pre-generated compact test set. This method employs layout information in reducing capture switching activity in a focused regional manner. Experiments demonstrate that the proposed method can effectively eliminate a large number of high-capture-power test vectors with neither test data inflation nor fault coverage loss.
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