A channel is considered enabled if CH[n].PSELP is set. If more than one channel, CH[n], is enabled, the ADC enters scan mode.
In scan mode, one SAMPLE task will trigger one conversion per enabled channel. The time it takes to sample all channels is:
Total time < Sum(CH[x].tACQ+tCONV), x=0..enabled channels
A DONE event signals that one channel has been sampled.
In this mode, the RESULTDONE event comes after each sample, that is, once for each channel.