STMicroelectronics STM32F405 Reference Manual page 176

Reset and clock control for STM32F42xxx and STM32F43xxx (RCC)
Bit 18 USART3RST: USART3 reset
Bit 17 USART2RST: USART2 reset
Bit 16 Reserved, must be kept at reset value.
Bit 15 SPI3RST: SPI3 reset
Bit 14 SPI2RST: SPI2 reset
Bits 13:12 Reserved, must be kept at reset value.
Bit 11 WWDGRST: Window watchdog reset
Bits 10:9 Reserved, must be kept at reset value.
Bit 8 TIM14RST: TIM14 reset
Bit 7 TIM13RST: TIM13 reset
Bit 6 TIM12RST: TIM12 reset
Bit 5 TIM7RST: TIM7 reset
Bit 4 TIM6RST: TIM6 reset
176/1731
Set and cleared by software.
0: does not reset USART3
1: resets USART3
Set and cleared by software.
0: does not reset USART2
1: resets USART2
Set and cleared by software.
0: does not reset SPI3
1: resets SPI3
Set and cleared by software.
0: does not reset SPI2
1: resets SPI2
Set and cleared by software.
0: does not reset the window watchdog
1: resets the window watchdog
Set and cleared by software.
0: does not reset TIM14
1: resets TIM14
Set and cleared by software.
0: does not reset TIM13
1: resets TIM13
Set and cleared by software.
0: does not reset TIM12
1: resets TIM12
Set and cleared by software.
0: does not reset TIM7
1: resets TIM7
Set and cleared by software.
0: does not reset TIM6
1: resets TIM6
DocID018909 Rev 11
RM0090