45.6.3.5 Host - Client Operation

ADC1 will serve as a Client of ADC0 by writing a '1' to the Client Enable bit in the Control A register of the ADC1 instance (ADC1.CTRLA.SLAVEEN). When enabled, GCLK_ADC0 clock and ADC0 controls are internally routed to the ADC1 instance.

In this mode of operation, the Client ADC1 is enabled by accessing the CTRLA register of the Host ADC0. In the same way, the Host ADC event inputs will be automatically routed to the Client ADC, meaning that the input events configuration must be done in the Host ADC (ADC0.EVCTRL).

ADC measurements can either start simultaneously on both ADCs, or be interleaved. The trigger mode selection is available in the Host ADC Control A register (ADC0.CTRLA.DUALSEL).