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TIMx External trigger

Question asked by bai.yongchen on Dec 28, 2013
Latest reply on Dec 28, 2013 by Clive One
what is the difference betwee TIM2_CH1_ETR and TIM2_ETR? I'v only found TIM2 has the TIM2_CH1_ETR, all other TIMs, such as TIM1, TIM3, TIM8, only have TIMx_ETR.
I'v also found the problem that only TIM2 can be triggered by TI1F_ED. But in reference manual we can see TIM1/TIM8, TIM2~TIM5 all can be triggered by ETR. Could someone tell me why?
 

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