摘要
针对用户专用键盘故障排查过程中的低效率问题,文中采用边界扫描法、内建自测试法等对其进行测试性设计改进,使得利用已有的边界扫描设备即可实现自动化故障诊断;并通过设置管脚短路和芯片功能异常两个故障实际验证了用户专用键盘可测试设计效果,实验结果表明,改进后的用户专用键盘可快速定位故障,并且具有较高的准确度和精度;文中对用户专用键盘进行测试性设计改进,以使其满足边界扫描设备测试要求,此种方法对其它单片机系统的测试性设计具有借鉴意义。
Aimed at the inefficiency problem in the process of fault positioning for user special keyboard, the paper improves the mod- ule＇ s testability by utilizing such method as boundary scan, BIST, etc. This makes it possible of automatic fault diagnosis for user special keyboard by using existing boundary scan device. Also, the paper validate the effect of testability design by set up two real faults of pin shortcut and ehip malfunction.. Experimental results show that the improved user special keyboard is able to position fault quickly with high accuracy and precision. The paper makes user special keyboard meet testing requirements of boundary sean device by improving it＇ s test- ability and other MCU system is able to learn from this method in their design.
出处
《计算机测量与控制》
2015年第12期3976-3979,共4页
Computer Measurement &Control
