control register 2
| ADON | A/D Converter ON / OFF  |  
| CONT | Continuous conversion  |  
| ADC_CFG | ADC configuration  |  
| DELS | Delay selection  |  
| DMA | Direct memory access mode  |  
| DDS | DMA disable selection  |  
| EOCS | End of conversion selection  |  
| ALIGN | Data alignment  |  
| JEXTSEL | External event select for injected group  |  
| JEXTEN | External trigger enable for injected channels  |  
| JSWSTART | Start conversion of injected channels  |  
| EXTSEL | External event select for regular group  |  
| EXTEN | External trigger enable for regular channels  |  
| SWSTART | Start conversion of regular channels  |