EFM8SB1 Datasheet, PDF (33/55 Pages) Silicon Laboratories – The EFM8SB1 highlighted features are listed below

Pin
Number
23
Pin Name
P0.4
24
P0.3
Description
Multifunction I/O
Multifunction I/O
Crossbar Capability
Yes
Yes
Additional Digital
Functions
P0MAT.4
INT0.4
INT1.4
P0MAT.3
EXTCLK
WAKEOUT
INT0.3
INT1.3
EFM8SB1 Data Sheet
Pin Definitions
Analog Functions
ADC0.4
CS0.4
ADC0.3
CS0.3
XTAL2
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