APB peripheral clock enable in Sleep mode register 1
| TIM3SMEN | TIM3 timer clock enable during Sleep mode |
| TIM4SMEN | TIM4 timer clock enable during Sleep mode |
| TIM6SMEN | TIM6 timer clock enable during Sleep mode |
| TIM7SMEN | TIM7 timer clock enable during Sleep mode |
| USART5SMEN | USART5 clock enable |
| USART6SMEN | USART6 clock enable |
| RTCAPBSMEN | RTC APB clock enable during Sleep mode |
| WWDGSMEN | WWDG clock enable during Sleep mode |
| USBSMEN | USB clock enable during Sleep mode |
| SPI2SMEN | SPI2 clock enable during Sleep mode |
| SPI3SMEN | SPI3 clock enable during Sleep mode |
| USART2SMEN | USART2 clock enable during Sleep mode |
| USART3SMEN | USART3 clock enable during Sleep mode |
| USART4SMEN | USART4 clock enable during Sleep mode |
| I2C1SMEN | I2C1 clock enable during Sleep mode |
| I2C2SMEN | I2C2 clock enable during Sleep mode |
| I2C3SMEN | I2C3 clock enable during Sleep mode |
| DBGSMEN | Debug support clock enable during Sleep mode |
| PWRSMEN | Power interface clock enable during Sleep mode |