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DSP中IO的配置问题



专家您好:

   我用的是F2801,在IO复用成PWM波功能的情况下,配置对称模式,通过CAU =1,以及CAD=2产生占空比。若此时令CMP=0使占空比=0,我想请教下,此时IO口输出就是一直是低电平吗?有没有一个很窄的示波器都不能分辨的脉冲呢?

谢谢!