SAM D21/DA1 Family

7.2.2 Serial Wire Debug Interface Pinout

Only the SWCLK pin is mapped to the normal port functions. A debugger cold-plugging or hot-plugging detection will automatically switch the SWDIO port to the SWDIO function.

Table 7-4. Serial Wire Debug Interface Pinout
Signal	Supply	I/O Pin
SWCLK	VDDIO	PA30
SWDIO	VDDIO	PA31

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.