14.3 Digital
Pin Function Type Description
1 D21/SCL1 Digital GPIO 21/I2C 1 Clock
2 D20/SDA1 Digital GPIO 20/I2C 1 Dataline
3 AREF Digital Analog Reference Voltage
4 GND Power Ground
5 D13/SCK Digital GPIO 13/SPI Clock
6 D12/CIPO Digital GPIO 12/SPI Controller In Peripheral Out
7 D11/COPI Digital GPIO 11/SPI Controller Out Peripheral In
8 D10/CS Digital GPIO 10/SPI Chip Select
9 D9/SDA2 Digital GPIO 9/I2C 2 Dataline
10 D8/SCL2 Digital GPIO 8/I2C 2 Clockline
11 D7 Digital GPIO 7
12 D6 Digital GPIO 6
13 D5 Digital GPIO 5
14 D4 Digital GPIO 4
15 D3 Digital GPIO 3
16 D2 Digital GPIO 2
17 D1/TX0 Digital GPIO 1 / Serial 0 Transmitter
18 D0/TX0 Digital GPIO 0 / Serial 0 Receiver
19 D14/TX3 Digital GPIO 14 / Serial 3 Transmitter
20 D15/RX3 Digital GPIO 15 / Serial 3 Receiver
21 D16/TX2 Digital GPIO 16 / Serial 2 Transmitter
22 D17/RX2 Digital GPIO 17 / Serial 2 Receiver
23 D18/TX1 Digital GPIO 18 / Serial 1 Transmitter
24 D19/RX1 Digital GPIO 19 / Serial 1 Receiver
25 D20/SDA Digital GPIO 20 / I2C 0 Dataline
26 D21/SCL Digital GPIO 21 / I2C 0 Clock