USB—1149.1边界扫描控制器的设计与实现  

Design and Implementation of USB—1149.1 Boundary Scan Controller

作　　者：耿建平[1] 陈林艳[1] 尚玉玲[1] 

机构地区：[1]桂林电子科技大学电子工程与自动化学院,广西桂林541004

出　　处：《计算机测量与控制》2014年第3期919-922,共4页Computer Measurement &Control

基　　金：国家自然科学基金项目(61102012)

摘　　要：随着支持IEEE1149.1标准的边界扫描芯片的广泛应用,边界扫描技术得到了迅速发展;根据该标准,提出了一种基于USB总线的边界扫描控制器的设计方案;该方案采用CY7C68013作为USB2.0接口控制器,JTAG主控单元使用测试总线控制器ACT8990;依据该方案设计的控制器能够完成USB协议和JTAG协议的相互转换,生成符合IEEE1149.1标准的测试信号;实验以内测试为例,验证该控制器能够正常工作;在此基础上进行了其他功能测试;实验结果表明,该控制器能够完成对数字电路的边界扫描测试,并能初步判断故障类型,具有测试方便、传输速度快等特点,提高了测试效率。With the wide use of boundary scan chips supported IEEEl149. 1 Std. , the boundary scan technology is developed quickly. According to the IEEE1149.1 Std. , a design scheme of boundary scan controller based on USB bus is proposed, where CY7C68013 is used as USB2. 0 interface controller, and test bus controller ACT8990 is used as JTAG master control unit. The boundary scan controller implemen- ted according to this scheme can convert the USB protocol and JTAG protocol each other, and can generate the test signals compliant with IEEEl149.1 Std.. Capture test is taken as experimental example to verify whether the boundary scan controller can work normally, and oth- er functional tests are also performed. The experimental results indicate that the designed boundary scan controller can perform the boundary scan test, and can identify the faults＇ type for digital circuits, which has the characteristics of convinent test, high transmission speed, im- proving the efficiency of the test.

关 键 词：JTAG 边界扫描 USB总线 测试总线控制器 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]