stm32输入捕获模式下，TIM_ICFilter的值选择不解

菜菜鸟儿

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为什么IC1F=0000对应TIM_ICFilter=0x00？如果IC1F=1000，那么TIM_ICFilter是多少？]它们之间的对应关系是什么？

我知道滤波器的长度是通过TIMx_CMMR1 [7:0]的IC1F[3:0]位来控制的，但是IC1F[3:0]只有4个位，0x00却是8个位的数值，所以一直搞不懂这点。

rektito

8位没有用满， 0x00不能超过1111， 即0x0F