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DSP28335英文手册有没有描述各个引脚在复位、上电、掉电时各个引脚的输出电平状态是？
F28335的引脚在复位及上电时是作为GPIO输入，电平状态取决于内部的上拉或下拉。掉电时的状态不确定。
默认状态，除了PWM引脚，其他引脚都是默认上拉的
