41.3.3.2 Conversion Triggers

A conversion is started by one of the following triggers, depending on the configuration of the START bit field in the Command (ADCn.COMMAND) register:

• Writing the IMMEDIATE value to the START bit field in the Command (ADCn.COMMAND) register
• Receiving an event input
• Writing to the Positive Input Multiplexer (ADCn.MUXPOS) register

Continuously repeating Single conversion or Burst accumulation can be enabled by writing a ‘1’ to the Free-Running (FREERUN) bit in the Control F (ADCn.CTRLF) register before starting the first conversion. The Free-Running mode is unsupported in Series mode.

Attempting to trigger a new conversion before the ongoing conversion is finished will set the Trigger Overrun Interrupt (TRIGOVR) flag in the Interrupt Flags (ADCn.INTFLAGS) register, and the trigger will be ignored.

The Result Ready and Sample Ready (RESRDY and SAMPRDY) interrupt flags in the Interrupt Flags (ADCn.INTFLAGS) register show if a conversion or accumulation has finished. These flags also trigger the corresponding interrupts if enabled in the Interrupt Control (ADCn.INTCTRL) register.