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关于EQEP管脚分配复用问题

在28375s PTP封装类型的芯片中,QEP管脚分配如下:

EQEP1A, GPIO20, 13

EQEP1B, GPIO21, 14

EQEP1I,  GPIO99, 17

因GPIO 23被其它外设复用,没有将EQEP1I配置为GPIO23的复用功能,请问上述配置可行吗?对信号的采样处理会不会有影响?