ST STM32F413 Reference Manual page 156

Reset and clock control (RCC) for STM32F413/423
Bits 3:2 Reserved, must be kept at reset value.
Bit 1 TIM8EN: TIM8 clock enable
Bit 0 TIM1EN: TIM1 clock enable
156/1284
Set and cleared by software.
0: TIM8 clock disabled
1: TIM8 clock enabled
Set and cleared by software.
0: TIM1 clock disabled
1: TIM1 clock enabled
DocID029473 Rev 3
RM0430