LL_USART_ClockInitTypeDef::ClockOutput field
Specifies whether the USART clock is enabled or disabled. This parameter can be a value of USART_LL_EC_CLOCK. USART HW configuration can be modified afterwards using unitary functions LL_USART_EnableSCLKOutput() or LL_USART_DisableSCLKOutput(). For more details, refer to description of this function.