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请问老师Simple 2.2V Low Battery Detect的作用和原理是什么？好像例程说明里面的端口有问题。。。
检测电池电压是否低于2.2V，建议搭建一个可手动调节VCC的电源，给EVM供电，然后把例程写进MCU，观察VCC在2.0V，2.5V时的程序运行结果
