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28035晶振问题

Expert 1250 points


28035我用的是X1,X2脚接的晶振,然后XCLKOUT,XCLKIN脚能否做普通的GPIO,怎么用,

还有如果用内部晶振和外部晶振有什么区别

  • q I

    GPIO18, GPIO19 默认就是GPIO功能,所以你不用配置它,它就已经是GPIO功能了,如果要作为XCLK输入输出,才需要通过MUX寄存器进行配置。

    外部晶振比内部竞争更高,内部晶振在经过软件校准后有1%的误差。

     

    Eric