ST STM32F405 Reference Manual page 177

RM0090
Bit 3 TIM5RST: TIM5 reset
Bit 2 TIM4RST: TIM4 reset
Bit 1 TIM3RST: TIM3 reset
Bit 0 TIM2RST: TIM2 reset
Reset and clock control for STM32F42xxx and STM32F43xxx (RCC)
Set and cleared by software.
0: does not reset TIM5
1: resets TIM5
Set and cleared by software.
0: does not reset TIM4
1: resets TIM4
Set and cleared by software.
0: does not reset TIM3
1: resets TIM3
Set and cleared by software.
0: does not reset TIM2
1: resets TIM2
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