stm32的时钟是什么
时间: 2023-12-01 12:03:56 浏览: 25
STM32的时钟包括多个时钟源,其中包括HSI、HSE、LSI、LSE和PLL。HSI是高速内部时钟,频率约为8MHz,精度不高;HSE是高速外部时钟,接外部时钟源,频率范围为4MHz~16MHz;LSI是低速内部时钟,频率约为40kHz,提供低功耗时钟;LSE是低速外部时钟,接频率为32.768kHz的石英晶体;PLL是锁相环倍频输出,其时钟输入源可选择为HSI/2、HSE或者HSE/2,倍频可选择为2~16倍,但输出频率最大不得超过72MHz。\[3\]
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