Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual page 849

Reference Manual
ADC - Analog to Digital Converter
26.3.3.2 Scan Mode
Scan mode is used to perform conversions across multiple channels, sweeping a set of selected inputs in a sequence. The configura-
tion of scan mode is done in the ADCn_SCANCTRL and ADCn_SCANCTRLX registers. It has similar controls and data read mecha-
nisms to single channel mode. There are two key differences between single channel mode and scan mode: the input sequence is
programmed differently, and it has additional information in the result to indicate the channel on which the conversion was acquired.
26.3.7 Input Selection explains how the input sequence is chosen. When the scan sequence is triggered, the ADC samples all inputs
that are included in the mask (ADCn_SCANMASK), starting at the lowest pin number. DIFF in ADCn_SCANCTRL selects whether sin-
gle ended or differential inputs are used. The FIFO data is tagged with SCANINPUTID and can be read along with the scan data using
ADCn_SCANDATAX register. The ADCn_SCANDATAXP can be used to read the latest valid entry from the scan FIFO without popping
it. There is also a ADCn_SCANDATA register that contains results without the SCANINPUTID appended.
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