一种新型JTAG数据的快速加载方法  

New Methodology of Fast Loading JTAG Data

作　　者：刘飞[1] 杨江平[2] 周曼丽[2] 

机构地区：[1]空军雷达学院研究生管理大队,湖北武汉430019 [2]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《计算机测量与控制》2007年第10期1370-1372,共3页Computer Measurement &Control

摘　　要：为解决传统边界扫描测试诊断软件在加载测试数据时出现不稳定而影响测试结果的问题,通过对边界扫描技术的研究和对传统边界扫描测试方法的分析,在实验中发现测试数据经过外部动态缓存和外部时钟的统一触发后不仅可以消除数据的不稳定性还可以得到可调的测试频率,在此基础上,利用微处理器和可编程逻辑器件的协同控制,设计了一种基于USB协议的JTAG端口测试数据快速加载方法;系统仿真和实验结果表明,加载数据稳定可靠,取得了比一般加载方法更好的效果。The testing data generated by traditional software of testing diagnosis for Boundary SCan （BS） is always unstable. To resolve this problem, some experiments based on studying the Boundary Scan Technique （BST） and analyzing the traditional testing ways of BST show that not only the stable data but the adjustable frequency could be got after the testing data dynamically registering and uniquely trigge-ring exteriorly. Thus, a new methodology of fast loading JTAG data is designed, which is according with the Universal Serial Bus （USB） protocol and under the concurrently controlling of MCU and CPLD. The system simulation and the experiment results indicate that the loading data are steady and reliable, and that a better effect is gained than the normal ways.

关 键 词：边界扫描 数据加载 通用串行总线 可编程逻辑器件 

分 类 号：TP206.1[自动化与计算机技术—检测技术与自动化装置]