Abstract: With the development of electronic technology,integration and complexity of electronic circuit system are increasingly higher.Boundary scan technology is more and more widely applied in electronic circuit system test.Based on the basic structure and principle of the boundary scan,this paper gives the algorithm of interconnect test vector generation and fault diagnosis,to research and implement interconnect test vector generation and fault diagnosis.In the paper,VS2008 software as a platform is used to develop a boundary scan test system,Walk-1 algorithm and MCSA algorithm are used to generate the vector,and the W step adaptive algorithm is used for fault diagnosis.Experimental results show that the test vector generated by system automatically has a short test time and a good test effect and its ability of fault diagnosis is strong.Diagnosis part can eliminate the confusion and misjudgment phenomenon,and the set fault can be accurate location and isolation.

Key words: boundary scan, test vector, interconnect test, fault diagnosis, test system

摘要： 随着电子技术的日益发展,电子电路系统的集成度和复杂性越来越高,边界扫描技术应用越来越广泛。在研究边界扫描基本结构和测试原理的基础上,给出互连测试矢量生成与故障诊断算法,对互连测试矢量生成和故障诊断进行研究与实现。使用VS2008软件作为平台开发边界扫描测试系统,采用走步1算法和改良计数算法进行矢量的生成,并根据W步自适应算法进行故障诊断。结果表明,系统自动生成的测试矢量测试时间短,效果好,故障诊断能力强,诊断部分能够消除征兆混淆和征兆误判现象,对设置的故障能够精确地定位和隔离。

关键词: 边界扫描, 测试矢量, 互连测试, 故障诊断, 测试系统

CLC Number: 

• TP274