SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
Sample triggering for each sample sequencer is defined in the ADC Event Multiplexer Select (ADCEMUX) register. Trigger sources include processor (default), analog comparators, an external signal on a GPIO specified by the GPIO ADC Control (GPIOADCCTL) register, a GP Timer, a PWM generator, and continuous sampling. The processor triggers sampling by setting the SSx bits in the ADC Processor Sample Sequence Initiate (ADCPSSI) register.
Care must be taken when using the continuous sampling trigger. If a sequencer's priority is too high, it is possible to starve other lower priority sequencers. Generally, a sample sequencer using continuous sampling should be set to the lowest priority. Continuous sampling can be used with a digital comparator to cause an interrupt when a particular voltage is seen on an input.