RNGEN=B_0x0, DMAEN=B_0x0, PKAEN=B_0x0, CRCEN=B_0x0
AHBENR register
| DMAEN | DMA and DMAMUX enable Set and enable by software. 0 (B_0x0): does not enable 1 (B_0x1): enable |
| GPIOAEN | GPIOA enable. It must be enabled by default |
| GPIOBEN | GPIOB enable. It must be enabled by default |
| CRCEN | CRC enable Set and enable by software. 0 (B_0x0): does not enable 1 (B_0x1): enable |
| PKAEN | PKA clock enable Set and enable by software. 0 (B_0x0): does not enable 1 (B_0x1): enable |
| RNGEN | RNG clock enable Set and enable by software. 0 (B_0x0): does not enable 1 (B_0x1): enable |