在peference manul的272面，有如下解释：
Prescaler descriptionThe prescaler can divide the counter clock frequency by any factor between 1 and 65536. Itis based on a 16-bit counter controlled through a 16-bit register (in the TIMx_PSC register).
所以说TIM_ClockDivision和Prescaler是两码事。
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Prescaler descriptionThe prescaler can divide the counter clock frequency by any factor between 1 and 65536. Itis based on a 16-bit counter controlled through a 16-bit register (in the TIMx_PSC register).
所以说TIM_ClockDivision和Prescaler是两码事。
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