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我在PWM1组内,设置PWM1A和PWM1B都为上升计数模式,到半周清零为低电平,PWM1B用了CBC模式,上电后PWM1B按CBC模式运作,但PWM1A我没采用
CBC模式却和PWM1B波形一样,请问这是什么原因?
你好,设定PWM1A和PWM1B都为上升计数模式,周期600(10微秒),计数清0时置1,到比较值500时清0,比较器1正输入为锯齿波,大于设定值时比较器动作,PWM1B强制低,实验时PWM1B在比较器动作时确实拉低了(有意在计数300时比较器动作),但PWM1A跟着拉低了,我在CBC设定中PWM1A是不动作的。请问这是啥原因?谢谢!