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A端为EC20的通讯接口 1.8V
B端为5V的串口转TTL 和电脑通讯
问题是B端电压被拉低 电压约2-3V 有时5V
还有就是如何设置Push Pull
万分感谢
你好 昨天测量发现 11脚GND与电源GND有100欧左右的电阻 ，正在排查问题
我验证下是否是引起这个问题的原因
A端为EC20的通讯接口 1.8V
