One-shot mode

One-shot operation is configured by enabling only one of the available channels defined by CH[n].PSELP, CH[n].PSELN, and CH[n].CONFIG registers.

Upon a SAMPLE task, the ADC powers up and starts to sample the input voltage. The CH[n].CONFIG.TACQ controls the acquisition time.

The time it takes to perform the first sample is t_PWRUP + t_ACQ + t_CONV, where t_ACQ is the acquisition time, t_CONV is the conversion time, and t_PWRUP is the time it takes to power up the ADC.

If multiple samples are taken, some combinations of t_ACQ and t_CONV will allow SAADC to pipeline sampling and conversion, at which point the actual sampling time is just t_CONV.

A DONE event signals that one sample has been taken.

In this mode, the RESULTDONE event has the same meaning as DONE when no oversampling takes place. Note that both events may occur before the actual value has been transferred into RAM by EasyDMA. For more information, see EasyDMA.