33.6.16 Command

Name: COMMAND
Offset: 0x48
Reset: 0x00000000
Property: Local Write-Protection

Bit 3130292827262524 
          
Access  
Reset  
Bit 2322212019181716 
          
Access  
Reset  
Bit 15141312111098 
          
Access  
Reset  
Bit 76543210 
 DIFFMODE[2:0] START[2:0] 
Access R/WR/WR/WR/WR/WR/WR/W 
Reset 0000000 

Bit 7 – DIFF Differential Mode

This bit controls whether the ADC conversion is Single-Ended or Differential.
ValueDescription
0 Unsigned Single-Ended conversion. Only INPUTCTRL.MUXPOS is used.
1 Signed Differential conversion. Both INPUTCTRL.MUXPOS and INPUTCTRL.MUXNEG are used.

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 Single mode will reset the accumulator.
ValueNameDescription
0x0 NONE None
0x1 SINGLE Single conversion
0x2 SERIES Series mode with accumulation, using a separate trigger for each conversion
0x3 BURST Burst mode with accumulation. A single trigger will initiate the number of conversions configured by CTRLD.SAMPNUM in one sequence.
0x7 ACCTEST Accumulator diagnostics mode
Other — Reserved

Bits 2:0 – START[2:0] Start Conversion

This bit field starts or stops an ADC conversion, or controls how an ADC conversion will be initiated.
Note: If CTRLA.ENABLE is ‘0’ when this bit field is written to IMMEDIATE, it will automatically be set to STOP.
ValueNameDescription
0x0 STOP Stop an ongoing conversion
0x1 IMMEDIATE Start a conversion immediately. This bit will be reset to STOP when the conversion is complete, unless Free-Running mode is enabled.
0x2 INPUT Start a conversion when a write to the INPUTCTRL register is performed
0x4 EVENT Start a conversion when an event is received by the ADC. This requires EVCTRL.STARTEI to be set to ‘1’.
Other — Reserved