基于IEEE1149.4的混合信号边界扫描测试控制器设计

Design of Mixed-signal Boundary-scan Test Controller Based on IEEE1149.4

简要介绍了IEEE1149.4混合信号测试总线及其特点,并根据该标准定义的测试结构对混合信号电路的测试方法进行研究,设计出符合IEEE1149.4标准的边界扫描控制器及其验证电路,实验结果表明该测试控制器能实现对混合信号电路板的测试,大大提高了混合信号电路板的可观性和可控性。

IEEE1149. 4 standard and mixed-signal test bus were introduced firstly. Then according to the test structure defined in this standard, test methods on mixed-signal circuit were researched, and a boundary-scan controller and demo circuit PCB were designed. Finally, experimental results indicate that the boundary-scan controller is feasible to the test of mixed-signal circuits, and greatly improves observability and controllability of mixed-signal PCB.