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.

Table 51-2. Input Pins and Channel Numbers
Input PinsChannel Numbers
Single-ended ModeDifferential Mode
AFE_AD0CH0CH0
AFE_AD1CH1
.........
AFE_AD10CH10CH10
AFE_AD11CH11
Note:
  1. AFE0_AD11 is not an actual pin but is connected to a temperature sensor.