AHB1 peripheral clock enable register
| DMA1EN | DMA1 clock enable |
| DMA2EN | DMA2 clock enable |
| DMAMUX1EN | DMAMUX clock enable |
| FLASHEN | Flash memory interface clock enable |
| CRCEN | CRC clock enable |
| TSCEN | Touch Sensing Controller clock enable |
| DMA2DEN | DMA2D clock enable |
| GFXMMUEN | Graphic MMU clock enable |