Sample-and-Hold Modes

The AFE can be configured in either single Sample-and-Hold mode (AFEC_SHMR.DUALx = 0) or dual Sample-and-Hold mode (AFEC_SHMR.DUALx = 1). By default, after a reset, the AFE is in single Sample-and-Hold mode.

The AFEC can apply a different mode on each channel.

The same inputs are used in single Sample-and-Hold mode or in dual Sample-and-Hold mode. Single-ended/Differential mode and single/dual Sample-and-Hold mode can be combined. See the following tables.

Table 1. Input Pins and Channel Numbers In Dual Sample-and-Hold Mode
Single-Ended Input Pins	Differential Input Pins	Channel Numbers
AFE_AD0 & AFE_AD6	AFE_AD0-AD1 & AFE_AD6–AFE_AD7	CH0
AFE_AD1 & AFE_AD7	–	CH1
...	...	...
AFE_AD4 & AFE_AD10	AFE_AD4–AFE_AD5 & AFE_AD10–AFE_AD11	CH4
AFE_AD5 & AFE_AD11	–	CH5

Table 2. Input Pins and Channel Numbers in Single Sample-and-Hold Mode
Single-Ended Input Pins	Differential Input Pins	Channel Numbers
AFE_AD0	AFE_AD0-AFE_AD1	CH0
AFE_AD1	–	CH1
...	...	...
AFE_AD10	AFE_AD10–AFE_AD11	CH10
AFE_AD11	–	CH11