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I want to know how much time delay there will be between the comparative output matching and the pin output. Is the delay fixed?

sliu.0
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Using STM32F407 comparative output function, we generate 57600Hz square wave. I find that there are some fluctuations in square wave. Observed by oscilloscope, the rising and falling edges of square wave have several ns fluctuations. So I want to know how much time delay there will be between the comparative output matching and the pin output. Is the delay fixed?

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