APB1 peripheral clock enable in low power mode register
| TIM2LPEN | TIM2 clock enable during Sleep mode |
| TIM3LPEN | TIM3 clock enable during Sleep mode |
| TIM4LPEN | TIM4 clock enable during Sleep mode |
| TIM5LPEN | TIM5 clock enable during Sleep mode |
| TIM6LPEN | TIM6 clock enable during Sleep mode |
| TIM7LPEN | TIM7 clock enable during Sleep mode |
| TIM12LPEN | TIM12 clock enable during Sleep mode |
| TIM13LPEN | TIM13 clock enable during Sleep mode |
| TIM14LPEN | TIM14 clock enable during Sleep mode |
| WWDGLPEN | Window watchdog clock enable during Sleep mode |
| SPI2LPEN | SPI2 clock enable during Sleep mode |
| SPI3LPEN | SPI3 clock enable during Sleep mode |
| USART2LPEN | USART2 clock enable during Sleep mode |
| USART3LPEN | USART3 clock enable during Sleep mode |
| UART4LPEN | UART4 clock enable during Sleep mode |
| UART5LPEN | UART5 clock enable during Sleep mode |
| I2C1LPEN | I2C1 clock enable during Sleep mode |
| I2C2LPEN | I2C2 clock enable during Sleep mode |
| I2C3LPEN | I2C3 clock enable during Sleep mode |
| CAN1LPEN | CAN 1 clock enable during Sleep mode |
| CAN2LPEN | CAN 2 clock enable during Sleep mode |
| PWRLPEN | Power interface clock enable during Sleep mode |
| DACLPEN | DAC interface clock enable during Sleep mode |