The AFE can be used either as a single-ended AFE (AFEC_DIFFR.DIFF = 0) or as a fully differential AFE (AFEC_DIFFR.DIFF = 1). By default, after a reset, the AFE is in Single-ended mode.
The AFEC can apply a different mode on each channel.
The same inputs are used in Single-ended or Differential mode.
Depending on the AFE mode, the analog multiplexer selects one or two inputs to map to a channel. The table below provides input mapping for both modes.
| Input Pins | Channel Numbers | |
|---|---|---|
| Single-ended Mode | Differential Mode | |
| AFE_AD0 | CH0 | CH0 |
| AFE_AD1 | CH1 | |
| ... | ... | ... |
| AFE_AD10 | CH10 | CH10 |
| AFE_AD11 | CH11 | |