RCC APB2 Sleep enable register
| TIM1LPENS | TIM1 sleep enable |
| TIM8LPENS | TIM8 sleep enable |
| USART1LPENS | USART1 sleep enable |
| USART6LPENS | USART6 sleep enable |
| UART9LPENS | UART9 sleep enable |
| USART10LPENS | USART10 sleep enable |
| SPI1LPENS | SPI1 sleep enable |
| SPI4LPENS | SPI4 sleep enable |
| TIM18LPENS | TIM18 sleep enable |
| TIM15LPENS | TIM15 sleep enable |
| TIM16LPENS | TIM16 sleep enable |
| TIM17LPENS | TIM17 sleep enable |
| TIM9LPENS | TIM9 sleep enable |
| SPI5LPENS | SPI5 sleep enable |
| SAI1LPENS | SAI1 sleep enable |
| SAI2LPENS | SAI2 sleep enable |