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手册上给出的是一个范围 实际应该多少呢?
Low-frequency internal oscillator (LFIOSC ) 10k 33k 90k
有什么寄存器可以控制这个频率吗
正常是30Khz左右的，但是这个低频内部振荡器是无法校准的，只能由系统自动生成。
