2 Module interfaces
2.2 Pin deî™˝nition
Pin number Symbol Type Function
1 PB4 I/O Common I/O pin,
which corresponds
to PB04 on the
internal IC
2 PB3 I/O Common I/O pin,
which corresponds
to PB03 on the
internal IC
3 PA2 I/O Burning pin,
SWDIO, which
corresponds to
PA02 on the
internal IC
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