EFM8SB1 Datasheet, PDF (27/55 Pages) Silicon Laboratories – The EFM8SB1 highlighted features are listed below

Pin
Number
20
Pin Name
P0.2
Center
GND
Description
Multifunction I/O
Ground
Crossbar Capability
Yes
Additional Digital
Functions
P0MAT.2
RTCOUT
INT0.2
INT1.2
EFM8SB1 Data Sheet
Pin Definitions
Analog Functions
ADC0.2
CS0.2
XTAL1
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