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 1. Serial Wire Debug Interface Pinout
Signal Supply I/O pin
SWCLK VDDIO PA30
SWDIO VDDIO PA31
Parent topic: Pinouts