大家好
我按照规格书推荐电路图测试,芯片12和16管脚接3.3V电压,当芯片8和13管脚接入电脑232串口时,输出电压正常,输出命令也正常。
把电脑232串口断开,芯片Dout输出电压为0
请问是什么问题?
谢谢!
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