This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
使用F28m35芯片的SCI模块，输入信号给SCI的RXDA引脚，为什么输入信号中的低电平被拉高到2.4V？
电平不匹配问题 或者灌电流问题
请在互联的IO口直接接入33欧的匹配电阻试试
电平都是0到3.3V的，试了在IO中串接33欧电阻，电平依然被拉高。。。还有什么办法么？
贴图
