ARM Tachnology：Chapter 3 STM32 Clock and Configuration

The clock tree of stM32F103 is shown in Fig 11 on page 115 of the STM32 Reference Manual(RM) Figure 11. Clock tre KA加 A co memory and DM wm回a 123As

6 The clock tree of STM32F103 is shown in Fig.11 on page 115 of the STM32 Reference Manual (RM)

There are several clocks for mcu core and different peripherals. Why?

8 There are several clocks for MCU core and different peripherals. Why?

First reason High speed clock is used for high speed devices, like CPU, and low speed clock is used for low speed devices like peripherals Second reason This mode of clock is helpful to realize low power

9 Second reason This mode of clock is helpful to realize low power. First reason High speed clock is used for high speed devices, like CPU, and low speed clock is used for low speed devices like peripherals