PWM input capture, problem of selecting trigger source

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PWM input capture, problem of selecting trigger source [Copy link]

I use CH1, CH2 and CH3 of TIM2 as input pins respectively. The trigger source selections for CH1 and CH2 are TIM_TS_TI1FP1 and TIM_TS_TI2FP2 respectively. But when using CH3, why is there no TIM_TS_TI3FP3? Does it mean that CH3 cannot be used as an input capture channel?

huo_hu

It is in the information, what is your chip model?