51.6.9 Differential Inputs
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 |
Note:
- AFE0_AD11 is not an actual pin but is connected to a temperature sensor.