ADC control register
| ADC_ON_OFF | ADC_ON_OFF: ā 0: power off the ADC ā 1: power on the ADC |
| START_CON | generate a start pulse to initiate an ADC conversion |
| STOP_OP_MOD | stop the on-going OP_MODE (ADC mode, Analog audio mode, Full |
| DIG_AUD_MODE | enable the digital audio mode (the data path uses the decimation filter) |
| TEST_MODE | select the functional or the test mode of the ADC |
| ADC_LDO_ENA | enable the LDO associated to the ADC block |