Atmel SAM C21 Xplained Pro User Manual

Table 4-2 Extension Header EXT2
Pin on EXT2 SAM C21
pin
Function Shared functionality
1 [ID] - - Communication line to the
ID chip on an extension
board.
2 [GND] - - Ground.
3 [ADC(+)] PA08 AIN10 Shield
4 [ADC(-)] PA09 AIN11 Shield
5 [GPIO1] PA10 GPIO -
6 [GPIO2] PA11 GPIO -
7 [PWM(+)] PB30 TCC0/WO0 Shield
8 [PWM(-)] PB31 TCC0/WO1 Shield
9 [IRQ/GPIO] PB16 IRQ0/GPIO EDBG GPIO1
10 [SPI_SS_B/GPIO] PB17 GPIO EDBG GPIO2
11 [TWI_SDA] PA12 SERCOM2 PAD[0] I
2
C SDA EXT1, EXT3, Shield, Crypto
Device, and EDBG I
2
C
12 [TWI_SCL] PA13 SERCOM2 PAD[1] I
2
C SCL EXT1, EXT3, Shield, Crypto
Device, and EDBG I
2
C
13 [USART_RX] PA23 SERCOM3 PAD[1] UART
RX
EXT1, EXT3, and Shield
14 [USART_TX] PA22 SERCOM3 PAD[0] UART
TX
EXT1, EXT3, and Shield
15 [SPI_SS_A] PB03 SERCOM5 PAD[1] SPI SS
16 [SPI_MOSI] PB00 SERCOM5 PAD[2] SPI
MOSI
EXT3, Shield, Shield(2), and
EDBG SPI
17 [SPI_MISO] PB02 SERCOM5 PAD[0] SPI
MISO
EXT3, Shield, Shield(2), and
EDBG SPI
18 [SPI_SCK] PB01 SERCOM5 PAD[3] SPI SCK EXT3, Shield, Shield(2), and
EDBG SPI
19 [GND] - - Ground.
20 [VCC] - - Power for extension board.
Atmel SAM C21 Xplained Pro [USER GUIDE]
Atmel-42460C-SAM C21 Xplained Pro_User Guide-10/2015
14
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Atmel SAM C21 Xplained Pro Specifications

General

Brand	Atmel
Model	SAM C21 Xplained Pro
Category	Motherboard
Language	English