APB1 peripheral Low-power clock enable register (CRM_APB1LPEN)
| TMR2LPEN | Timer2 clock enable during sleep mode |
| TMR3LPEN | Timer3 clock enable during sleep mode |
| TMR4LPEN | Timer4 clock enable during sleep mode |
| TMR6LPEN | Timer6 clock enable during sleep mode |
| TMR7LPEN | Timer7 clock enable during sleep mode |
| TMR13LPEN | Timer13 clock enable during sleep mode |
| TMR14LPEN | Timer14 clock enable during sleep mode |
| WWDTLPEN | WWDT 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 |
| USART4LPEN | USART4 clock enable during sleep mode |
| USART5LPEN | USART5 clock enable during sleep mode |
| I2C1CPEN | I2C1 clock enable during sleep mode |
| I2C2CPEN | I2C2 clock enable during sleep mode |
| I2C3CPEN | I2C3 clock enable during sleep mode |
| CAN1LPEN | CAN1 clock enable during sleep mode |
| PWCLPEN | PWC clock enable during sleep mode |
| UART7LPEN | UART7 clock enable during sleep mode |
| UART8LPEN | UART8 clock enable during sleep mode |