_XTAL_FREQ
时间: 2023-08-07 07:02:22 浏览: 81
引用\[3\]中的代码片段中定义了一个宏"_XTAL_FREQ",它用于定义晶振的频率。在这个例子中,"_XTAL_FREQ"被设置为20000000,表示晶振的频率为20 MHz。这个宏在代码中被用于计算延时函数的参数。
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