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【咨询】F28027的EPWM1A输出对GPIO1输出有影响

使用F28027的LaunchPad,将GPIO0作为EPWM1A输出方波,GPIO1作为普通IO口输出高低电平。

【现象】1、EPWM1A输出的方波在上升沿和下降沿都产生过冲;

2、当EPWM1A输出方波,GPIO1在方波上升沿和下降沿时刻产生毛刺;当EPWM1A强制为低电平后,GPIO1输出高低电平则不产生毛刺。

【问题】这两种现象产生的原因是什么?有方法解决吗?谢谢