AHB1 peripheral clock enable in low power mode register
| GPIOALPEN | IO port A clock enable during sleep mode |
| GPIOBLPEN | IO port B clock enable during Sleep mode |
| GPIOCLPEN | IO port C clock enable during Sleep mode |
| GPIODLPEN | IO port D clock enable during Sleep mode |
| GPIOELPEN | IO port E clock enable during Sleep mode |
| GPIOFLPEN | IO port F clock enable during Sleep mode |
| GPIOGLPEN | IO port G clock enable during Sleep mode |
| GPIOHLPEN | IO port H clock enable during Sleep mode |
| GPIOILPEN | IO port I clock enable during Sleep mode |
| CRCLPEN | CRC clock enable during Sleep mode |
| FLITFLPEN | Flash interface clock enable during Sleep mode |
| SRAM1LPEN | SRAM 1interface clock enable during Sleep mode |
| SRAM2LPEN | SRAM 2 interface clock enable during Sleep mode |
| BKPSRAMLPEN | Backup SRAM interface clock enable during Sleep mode |
| DMA1LPEN | DMA1 clock enable during Sleep mode |
| DMA2LPEN | DMA2 clock enable during Sleep mode |
| ETHMACLPEN | Ethernet MAC clock enable during Sleep mode |
| ETHMACTXLPEN | Ethernet transmission clock enable during Sleep mode |
| ETHMACRXLPEN | Ethernet reception clock enable during Sleep mode |
| ETHMACPTPLPEN | Ethernet PTP clock enable during Sleep mode |
| OTGHSLPEN | USB OTG HS clock enable during Sleep mode |
| OTGHSULPILPEN | USB OTG HS ULPI clock enable during Sleep mode |