Atmel SAM L22 Xplained Pro, User Manual

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Table 4-1. Extension Header EXT1
EXT1 pin SAM L22
pin Function Shared functionality
1 [ID] - - Communication line to the ID
chip on an extension board
2 [GND] - - Ground
3 [ADC(+)] PA02 AIN[0] -
4 [ADC(-)] PA03 AIN[1] Shield
5 [GPIO1] PA20 GPIO (RTS) -
6 [GPIO2] PA21 GPIO (CTS) -
7 [PWM(+)] PB08 TC0/WO[0] -
8 [PWM(-)] PB09 TC0/WO[1] -
9 [IRQ/GPIO] PC02 IRQ10/GPIO -
10 [SPI_SS_B/GPIO] PC03 GPIO -
11 [TWI_SDA] PB30 SERCOM5 PAD[0] I²C SDA EXT2 , EXT3 , Shield , Crypto , and
EDBG I²C
12 [TWI_SCL] PB31 SERCOM5 PAD[1] I²C SCL EXT2 , EXT3 , Shield , Crypto , and
EDBG I²C
13 [USART_RX] PA23 SERCOM2 PAD[1] UART RX -
14 [USART_TX] PA22 SERCOM2 PAD[0] UART TX -
15 [SPI_SS_A] PB21 SERCOM3 PAD[1] SPI SS -
16 [SPI_MOSI] PB00 SERCOM3 PAD[2] SPI MOSI -
17 [SPI_MISO] PB02 SERCOM3 PAD[0] SPI MISO -
18 [SPI_SCK] PB01 SERCOM3 PAD[3] SPI SCK -
19 [GND] - - Ground
20 [VCC] - - Power for extension board
Table 4-2. Extension Header EXT2
EXT2 pin SAM L22
pin Function Shared functionality
1 [ID] - - Communication line to the ID
chip on an extension board
2 [GND] - - Ground
3 [ADC(+)] PA04 AIN[4] Shield
4 [ADC(-)] PA05 AIN[5] Shield
5 [GPIO1] PB04 GPIO EDBG GPIO0 , SLCD , and XAM
Atmel SAM L22 Xplained Pro [USER GUIDE]
Atmel-42474B-SAM-L22-Xplained-Pro_User Guide-12/2015
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