ADC common control register
| DUAL | Dual ADC mode selection |
| DELAY | Delay between 2 sampling phases |
| DMACFG | DMA configuration (for multi-ADC mode) |
| MDMA | Direct memory access mode for multi ADC mode |
| CKMODE | ADC clock mode |
| PRESC | ADC prescaler |
| VREFEN | VREFINT enable |
| CH17SEL | CH17 selection |
| CH18SEL | CH18 selection |