Datasheet
37. Electrical Characteristics
7.2 Other Functions
7.2.1 Oscillator Pinout
The oscillators are not mapped to the normal port functions and their multiplexing are controlled by
registers in the System Controller (SYSCTRL).
Table 7-3. Oscillator Pinout
Oscillator Supply Signal I/O Pin
XOSC VDDIO XIN PA14
XOUT PA15
XOSC32K VDDANA XIN32 PA00
XOUT32 PA01
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
7.2.3 SERCOM I
2
C Pins
Table 7-5. SERCOM Pins Supporting I
2
C
Device Pins Supporting I
2
C Hs mode
SAM D21E PA08, PA09, PA16, PA17, PA22, PA23
SAM D21G PA08, PA09, PA12, PA13, PA16, PA17, PA22, PA23
SAM D21J PA08, PA09, PA12, PA13, PA16, PA17, PA22, PA23, PB12, PB13, PB16, PB17,
PB30, PB31
SAM D21 Family
I/O Multiplexing and Considerations
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 32