Atmel SAM C21 Xplained Pro User Manual

Caution: The target section of SAM C21 Xplained Pro can be powered by 3.3V or 5.0V. The
maximum voltage the I/O pins can tolerate depends on the supply voltage. Providing higher
voltages like 5V to an I/O pin when the ATSAMC21J18A is powered by 3.3V could damage the
board.
Info: Note that all pins do not have the exact same functionality as on the Arduino Uno on the
shield connectors. Each shield should be checked for compatibility before it is connected.
Table 4-4 J802 - Power
Pin on J802 SAM C21 pin Arduino pin name Function Shared functionality
1 - RFU - -
2 - IOREF VCC_TARGET_P3V3_P5V0 -
3 RESETN RESET TARGET_RESET -
4 - 3.3V VCC_P3V3 -
5 - 5V VCC_P5V0 -
6 - GND GND -
7 - GND GND -
8 - VIN VCC_EXT_P5V0 -
Table 4-5 J803 - Analog
Pin on J803 SAM C21 pin Arduino pin name Function Shared functionality
1 PB09 ADC0 INP1 EXT1
2 PB08 ADC1 INN1 EXT1
3 PA08 ADC2 AIN10 EXT2
4 PA09 ADC3 AIN11 EXT2
5 PB07 ADC4 AIN9 / INP2 EXT3
6 PB06 ADC5 AIN8 / INN2 EXT3
Table 4-6 J804 - Digital Low
Pin on J804 SAM C21 pin Arduino pin name Function Shared functionality
1 PA23 D0 / RX0 SERCOM3 PAD1 UART RX EXT1, EXT2, and EXT3
2 PA22 D1 / TX0 SERCOM3 PAD0 UART TX EXT1, EXT2, and EXT3
3 PA20 D2 GPIO EXT1
4 PB12 D3 TC0_W0 EXT1 and EDBG GPIO
5 PA21 D4 GPIO EXT1
6 PB13 D5 TC0_W1 EXT1
Atmel SAM C21 Xplained Pro [USER GUIDE]
Atmel-42460C-SAM C21 Xplained Pro_User Guide-10/2015
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Atmel SAM C21 Xplained Pro Specifications

General

Brand	Atmel
Model	SAM C21 Xplained Pro
Category	Motherboard
Language	English