Microchip Technology SAMC21N Xplained Pro, Manual

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Cortex Debug Connector pin Pin / Net Function
7 - -
8 - -
9 GND Ground
10 RESETN Target reset signal
4.3 Peripherals
4.3.1 LED
There is one yellow LED available on the SAMC21N Xplained Pro board that can be turned on and off.
The LED is activated by driving the connected I/O line to low.
Table 4-13. LED Connection
SAMC21N pin Function Shared functionality
PC05 TCC2/WO1 for User LED (Yellow color) -
4.3.2 Mechanical Buttons
SAMC21N Xplained Pro contains two mechanical buttons connected to the SAMC21N. One button is the
RESET button connected to the reset line and the other is a generic user configurable button. When a
button is pressed it will drive the I/O line to GND.
Info: There is no pull-up resistor connected to the generic user button. Remember to enable
the internal pull-up in the SAMC21N to use the button.
Table 4-14. Mechanical Buttons
SAMC21N pin Function Shared functionality
RESETN RESET Shield , Shield(2) , and EDBG
PB19 GPIO for User Button -
4.3.3 Crystals
The SAMC21N Xplained Pro kit contains one mounted 32.768kHz crystal and a footprint for higher
frequency crystals that can be used as clock sources for the SAMC21N. The crystals have cut-straps next
to them that can be used to measure the oscillator safety factor. This is done by cutting the strap and
adding a resistor across the strap. Information about oscillator allowance and safety factor can be found
in appnote
AVR4100 . Information about clock calibration and compensation can be found in appnote
AT03155 .
Table 4-15. External 32.768kHz Crystal
SAMC21N pin Function Shared functionality
PA00 XIN32 -
PA01 XOUT32 -
SAMC21N Xplained Pro
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2017 Microchip Technology Inc.
User Guide
DS70005318A-page 20