文中介绍JTAG边界扫描的概念、技术特点，以及在芯片功能测试、系统诊断、仿真、性能分析和导通测试方面的应用。
This paper focuses on the JTAG ideas and technical characteristics and summarizes the JTAG usage in chip function test, system diagnosis, simulation, performance analysis and conduction test.
测试功能包括导通测试、断点检测与定位以及短路点的检测。
Its functions include conducting state test, measurement and location of the broken point, and short-circuit point measurement.
在整袋液体即将输液完毕时，电路会自动导通发出相关提示，实现输液完毕自动提示功能。
When the whole transfusion bag is finished, the circuit can automatically connect and send out relative prompts, thereby realizing the automatic prompting function after transfusion.
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