AHB Low-power Peripheral Clock enable register 1 (CRM_AHBLPEN1)
| GPIOALPEN | IO A clock enable during sleep mode |
| GPIOBLPEN | IO B clock enable during sleep mode |
| GPIOCLPEN | IO C clock enable during sleep mode |
| GPIODLPEN | IO D clock enable during sleep mode |
| GPIOFLPEN | IO F clock enable during sleep mode |
| CRCLPEN | CRC clock enable during sleep mode |
| FLASHLPEN | Flash clock enable during sleep mode |
| SRAMLPEN | SRAM clock enable during sleep mode |
| DMA1LPEN | DMA1 clock enable during sleep mode |
| DMA2LPEN | DMA2 clock enable during sleep mode |
| OTGHSLPEN | OTGHS clock enable during sleep mode |