User Manual

Module Pin Function MCU Pin Port Configuration
24 AREF 9 MUX=B; disable digital
25 ADC0 10 MUX=B; AIN[1]; disable digital
Can be used for UART with RTS/CTS
26 ADC1 11 MUX=B; AIN[2]¸ disable digital
Can be used for UART with RTS/CTS
27 - Not connected
28 - Not connected
29 GND
30 SWCLK 45 Programming interface
31 SWDIO 46 Programming interface
32 - Not connected
33 ATECC508 GPIO Crypto IC GPIO with intrusion detection feature
34 - Not connected
35 - Not connected
36 I2C SCL 32 SERCOM3 PAD1 MUX=C
37 I2C SDA 31 SERCOM3 PAD0 MUX=C
38 - Not connected
39 - Not connected
40 - Not connected
41 GND
42 GND
Atmel ATSAMR21G18-MR210UA [DATASHEET]
Atmel-42475B-ATSAMR21G18-MR210UA_Datasheet_Preliminary-09/2015
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