RCC APB4 Sleep Clock Register
| SYSCFGLPEN | SYSCFG peripheral clock enable during CSleep mode |
| LPUART1LPEN | LPUART1 Peripheral Clocks Enable During CSleep Mode |
| SPI6LPEN | SPI6 Peripheral Clocks Enable During CSleep Mode |
| I2C4LPEN | I2C4 Peripheral Clocks Enable During CSleep Mode |
| LPTIM2LPEN | LPTIM2 Peripheral Clocks Enable During CSleep Mode |
| LPTIM3LPEN | LPTIM3 Peripheral Clocks Enable During CSleep Mode |
| LPTIM4LPEN | LPTIM4 Peripheral Clocks Enable During CSleep Mode |
| LPTIM5LPEN | LPTIM5 Peripheral Clocks Enable During CSleep Mode |
| COMP12LPEN | COMP1/2 peripheral clock enable during CSleep mode |
| VREFLPEN | VREF peripheral clock enable during CSleep mode |
| RTCAPBLPEN | RTC APB Clock Enable During CSleep Mode |
| SAI4LPEN | SAI4 Peripheral Clocks Enable During CSleep Mode |