MCU为STM32的学习笔记之系统时钟和SysTick定时器-MCU STM32 study notes the system clock and SysTick timer

本框图是对STM32的内部时钟系统的一种框图解释，对于arm学习的新手来说非常有帮助。-The block diagram of the STM32' s internal clock is a block diagram to explain the system, for novice learning arm very helpful.