4.3 Serial Wire Debug Interface Pinout

The SWCLK pin is by default assigned to the SWCLK peripheral function G to allow debugger probe detection.

A debugger probe detection (cold-plugging or hot-plugging) will automatically switch the SWDIO I/O pin to the SWDIO function, as long as the SWLCK peripheral function is selected.

Table 4-4. Serial Wire Debug Interface Pinout
Signal	Supply	I/O pin
SWCLK	VDDIO	PA30
SWDIO	VDDIO	PA31

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