SAM C21 Xplained Pro

4.3.1 LED

There is one yellow LED available on the SAM C21 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
SAM C21 pin	Function	Shared functionality
PA15	Yellow LED0	Crystal footprint and EXT3

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