30.3.3.1 Operation Modes

The ADC supports six different operation modes, with differential and single-ended conversions possible for each mode. This is configured in the Command (ADCn.COMMAND) register.

The operation modes can be split into three groups:
  • Single mode - Single conversion per trigger, with 8- or 12-bit conversion output
  • Series Accumulation mode - One conversion per trigger, with an accumulation of n samples
  • Burst Accumulation mode - A burst with n samples accumulated as fast as possible after a single trigger

Series and Burst modes utilize 12-bit conversions and can be configured with or without scaling of the accumulated result. The number of samples to accumulate is controlled by the SAMPNUM bit in the Control F (ADCn.CTRLF) register. The accumulator is always reset to zero when a new Series or Burst accumulation is started.

The table below shows an overview of the available operation modes.

Table 30-1. Operation Modes
Operation ModeCOMMAND Mode Conversions Per TriggerAccumulation TypeRESULT Update
Single 8-bit01N/AEvery conversion
Single 12-bit1
Series Accumulation21FullAfter SAMPNUM conversions
Series Accumulation with Scaling3Scaled
Burst Accumulation 4SAMPNUMFullAfter SAMPNUM conversions
Burst Accumulation with Scaling5Scaled