STM32L0 复位和时钟控制 Reset and clock control (RCC)

时钟源: HSE:外部时钟 HSI16:可以直接用于系统时钟或者作为PLL输入。一般是1%精度 HSI48:The HSI48 clock signal is generated from an internal 48 MHz RC oscillator and can be used directly for USB and for random number generator (RNG) M
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