36.5.4.1 Trigger Selection Class 2 Inputs

For each one of the Class 2 inputs, the user application can independently specify a conversion trigger source. The individual trigger source for an analog input x is specified by the TRGSRC[4:0] bits located in registers ADCTRG1 through ADCTRG2. For example, these trigger sources can include:

  • Event System (EVSYS): The event system is tied with many peripherals. The peripheral can be an event generator and ADC can be an event user to trigger the ADC conversion. See User m register from Related Links.
  • External INT0 Pin Trigger: In this mode, the ADC module starts a conversion on an active transition on the INT0 pin. The INT0 pin may be programmed for either a rising edge input or a falling edge input to trigger the conversion process.
  • Global Software Trigger: The ADC module can be configured for manually triggering a conversion for all inputs that have selected this trigger option. The user can manually trigger a conversion by setting the Global Software Trigger bit, GSWTRG (ADCCON3[6]).