32.5.11 Command

Bits 6:4 – MODE[2:0] Mode

This bit field controls the conversion mode for the ADC. Switching from one of the accumulation modes to a Single mode will reset the accumulator.

For more information on the operation modes, see the section Operation Modes and the section Accumulator Test within.

Value	Name	Description
0x0	SINGLE_8BIT	Single conversion with 8-bit resolution
0x1	SINGLE_10BIT	Single conversion with 10-bit resolution
0x2	SERIES	Series with accumulation, separate trigger for every 10-bit conversion
0x3	BURST	Burst with accumulation. One trigger will run SAMPNUM 10-bit conversions in one sequence.
0x7	ACCTEST	Accumulator diagnostics mode for Functional Safety applications
Other	-	Reserved

This bit field starts or stops an ADC conversion, or controls how an ADC conversion will start.

Note: If the ENABLE bit in ADCn.CTRLA is ‘0’ when writing the START bit field to IMMEDIATE, it will automatically be set to STOP.

Value	Name	Description
0x0	STOP	Stop an ongoing conversion
0x1	IMMEDIATE	Start a conversion immediately. The bitfield value will be set back to STOP after the conversion is completed unless Free-Running mode is enabled
0x2	MUXPOS_WRITE	Start when a write to the MUXPOS register is done
0x4	EVENT_TRIGGER	Start when an event is received by the ADC
Other	-	Reserved