共查询到19条相似文献,搜索用时 78 毫秒
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为减少三维芯核绑定前和绑定后的测试时间,降低测试成本,提出了基于跨度和虚拟层的三维芯核测试外壳扫描链优化方法.所提方法首先通过最大化每条测试外壳扫描链的跨度,使得绑定前高层电路和低层电路的测试外壳扫描链数量尽可能相等.然后,在TSVs(Through Silicon Vias)数量的约束下,逐层的将虚拟层中的扫描元素分配到测试外壳扫描链中,以平衡绑定前后各条测试外壳扫描链的长度.实验结果表明,所提方法有效地减少了三维芯核绑定前后测试的总时间和硬件开销. 相似文献
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王浩若 《国际广播电视技术》1997,11(4):43-44
本文介绍了有线电视系统测试中,扫描测试的重要性及必要性,重点介绍了隐形扫描测试方法的先进性及如何应用隐形扫描系统方便地完成了扫描测试,并指出了随着有线电视事业的发展,越来越多的人将认识到扫描测试是不可少的重要测试之一。 相似文献
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基于CAN总线的嵌入式汽车电子测试系统 总被引:1,自引:0,他引:1
为满足汽车厂商对于汽车电子产品的测试需求,提出了基于CAN总线和嵌入式技术的汽车电子检测系统的实现方法。以USB车载音频娱乐系统的测试仪器为例对该方法进行了具体解释,首先给出了硬件设计的基本结构,重点描述了CAN总线控制器和驱动器的电路设计;其次说明了软件设计的分层结构,采用Wince作为仪器的操作系统,具体分析了CAN总线驱动程序在Wince中的实现;最后描述了上层应用程序的具体流程。USB部件测试仪器已成功应用于现场生产中,并取得了良好效果,实践表明,该测试方法是一种有效的解决方案,可以满足汽车厂商的测试需求。 相似文献
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光纤数字传输网是现代信息社会的基础。随着科学技术的飞速发展,它作为信息高速公路,在经济发展和社会进步中的地位和作用越来越重要。因此,建立一种适合本地网情况的光缆自动测试系统,对本地光纤传输网进行不间断地自动载线监测,及时发现排除故障,对于本地网的维护管 相似文献
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1394总线线缆作为信号传输载体,直接影响着高速通信系统中传输信号的安全性和可靠性。为了提高系统的通信质量,文章通过对1394总线线缆传输信号质量的理论分析,并在IEEE-1394总线协议的规范下,设计了传输信号质量的测试方法。根据实验数据分析了影响传输信号质量的因素,进而提出提高通信质量的具体措施,同时也有助于高可靠性1394总线应用系统的进一步发展。 相似文献
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一种基于PXI总线的通用测试分析系统 总被引:1,自引:0,他引:1
介绍了一种基于PXI总线的通用测试分析系统,详细说明了该系统的基本原理、硬件结构和软件结构。该系统采用模块化设计,集成度高、应用范围广,适合不同频率的信号采集与分析。 相似文献
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USB(通用串行总线)是微机的事实上外设互连标准,早期的USB.1.0版本的传输速率只有1.5和12Mb/s,去年升级后2.0版本的传输速率达到480Mb/s,已经适合连接硬磁盘等较高传输速率的微机外设了。目前,微机都配备USB作为标准接口,用于键盘、扫描仪、打印机、鼠标、数字照相机等的接入。测量仪器亦开发出采用USB总线的数据采集、数字示波器、数字多用表等产品。USB总线的主要性能可归纳为: 相似文献
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分析了芯片级测试的特点以及与传统板级测试区别,对SOC测试结构的核心部分测试访问机制(TAM)和Wrapper进行了详细的论述,分析了系统级芯片的测试结构及其优化. 相似文献
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This paper deals with the design of SOC test architectures which are efficient with respect to required ATE vector memory depth and test application time. We advocate the usage of a TestRail Architecture, as this architecture, unlike others, allows not only for efficient core-internal testing, but also for efficient testing of the circuitry external to the cores. We present a novel heuristic algorithm that effectively optimizes the TestRail Architecture for a given SOC by efficiently determining the number of TestRails and their widths, the assignment of cores to the TestRails, and the wrapper design per core. Experimental results for four benchmark SOCs show that, compared to previously published algorithms, we obtain comparable or better test times at negligible compute time. 相似文献
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讨论了使测试访问机制最优化的几个问题,然后试着采用遗传算法来解决这些问题,在两个SoC上用遗传算法进行实验,把实验结果与采用整数线性规划方法(Integer Linear Programming,ILP)的结果进行比较可以发现效果改善的很明显。实验结果说明采用遗传算法对测试访问机制进行最优化处理的效果要好于ILP。 相似文献
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On IEEE P1500's Standard for Embedded Core Test 总被引:4,自引:0,他引:4
Erik Jan Marinissen Rohit Kapur Maurice Lousberg Teresa McLaurin Mike Ricchetti Yervant Zorian 《Journal of Electronic Testing》2002,18(4-5):365-383
The increased usage of embedded pre-designed reusable cores necessitates a core-based test strategy, in which cores are tested as separate entities. IEEE P1500 Standard for Embedded Core Test (SECT) is a standard-under-development that aims at improving ease of reuse and facilitating interoperability with respect to the test of core-based system chips, especially if they contain cores from different sources. This paper briefly describes IEEE P1500, and illustrates through a simplified example its scalable wrapper architecture, its test information transfer model described in a standardized Core Test Language, and its two compliance levels. The standard is still under development, and this paper only reflects the view of six active participants of the standardization committee on its current status. 相似文献
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Vikram Iyengar Krishnendu Chakrabarty Erik Jan Marinissen 《Journal of Electronic Testing》2002,18(2):213-230
Test access mechanisms (TAMs) and test wrappers are integral parts of a system-on-chip (SOC) test architecture. Prior research has concentrated on only one aspect of the TAM/wrapper design problem at a time, i.e., either optimizing the TAMs for a set of pre-designed wrappers, or optimizing the wrapper for a given TAM width. In this paper, we address a more general problem, that of carrying out TAM design and wrapper optimization in conjunction. We present an efficient algorithm to construct wrappers that reduce the testing time for cores. Our wrapper design algorithm improves on earlier approaches by also reducing the TAM width required to achieve these lower testing times. We present new mathematical models for TAM optimization that use the core testing time values calculated by our wrapper design algorithm. We further present a new enumerative method for TAM optimization that reduces execution time significantly when the number of TAMs being designed is small. Experimental results are presented for an academic SOC as well as an industrial SOC. 相似文献
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由于SoC结构的复杂性,必须考虑采用多种可测性设计策略.从功能测试的角度出发,提出了一种基于复用片内系统总线的可测性设计策略,使得片内的各块电路都可被并行测试.阐述了其硬件实现及应用测试函数编写功能测试矢量的具体流程.该结构硬件开销小,测试控制过程简单,可减小测试矢量规模,已应用到一种基于X8051核的智能测控SoC,该SoC采用0.35μm工艺进行了实现,面积为4.1 mm×4.1 mm,测试电路的面积仅占总面积的2%. 相似文献
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We present an analysis of test application time for test data compression techniques that are used for reducing test data volume and testing time in system-on-a-chip (SOC) designs. These techniques are based on data compression codes and on-chip decompression. The compression/decompression scheme decreases test data volume and the amount of data that has to be transported from the tester to the SOC. We show via analysis as well as through experiments that the proposed scheme reduces testing time and allows the use of a slower tester. Results on test application time for the ISCAS'89 circuits are obtained using an ATE testbench developed in VHDL to emulate ATE functionality. 相似文献