APB1 peripheral clock enable in low power mode register
| TIM2LPEN | Timer 2 clock enable during Sleep mode |
| TIM3LPEN | Timer 3 clock enable during Sleep mode |
| TIM4LPEN | Timer 4 clock enable during Sleep mode |
| TIM6LPEN | Timer 6 clock enable during Sleep mode |
| TIM7LPEN | Timer 7 clock enable during Sleep mode |
| LCDLPEN | LCD clock enable during Sleep mode |
| WWDGLPEN | Window watchdog clock enable during Sleep mode |
| SPI2LPEN | SPI 2 clock enable during Sleep mode |
| USART2LPEN | USART 2 clock enable during Sleep mode |
| USART3LPEN | USART 3 clock enable during Sleep mode |
| I2C1LPEN | I2C 1 clock enable during Sleep mode |
| I2C2LPEN | I2C 2 clock enable during Sleep mode |
| USBLPEN | USB clock enable during Sleep mode |
| PWRLPEN | Power interface clock enable during Sleep mode |
| DACLPEN | DAC interface clock enable during Sleep mode |
| COMPLPEN | COMP interface clock enable during Sleep mode |