APB2 peripheral clocks enable in Sleep mode register
| ADCSMEN | ADC clocks enable during CPU1 Csleep and CStop modes |
| TIM1SMEN | TIM1 timer clock enable during CPU1 CSleep mode. |
| SPI1SMEN | SPI1 clock enable during CPU1 CSleep mode. |
| USART1SMEN | USART1 clock enable during CPU1 Csleep and CStop modes. |
| TIM16SMEN | TIM16 timer clock enable during CPU1 CSleep mode. |
| TIM17SMEN | TIM17 timer clock enable during CPU1 CSleep mode. |