Data Sheet

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Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
6.2 Other Functions
6.2.1 Oscillator Pinout
The oscillators are not mapped to the normal PORT functions and their multiplexing are controlled by registers in the
System Controller (SYSCTRL).
6.2.2 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.
Oscillator Supply Signal I/O Pin
XOSC VDDIO
XIN PA14
XOUT PA15
XOSC32K VDDANA
XIN32 PA00
XOUT32 PA01
Signal Supply I/O Pin
SWCLK VDDIO PA30
SWDIO VDDIO PA31