Pinout
4.1 USB
Pin Function Type Description
1 VUSB Power Power Supply Input. If board is powered via VUSB from header this is an Output (1)
2 D- Differential USB differential data -
3 D+ Differential USB differential data +
4 ID Analog Selects Host/Device functionality
5 GND Power Power Ground
4.2 Headers
The board exposes two 15 pin connectors which can either be assembled with pin headers or soldered through castellated vias.
Pin Function Type Description
1 D13 Digital GPIO
2 +3V3 Power Out Internally generated power output to external devices
3 AREF Analog Analog Reference; can be used as GPIO
4 A0/DAC0 Analog ADC in/DAC out; can be used as GPIO
5 A1 Analog ADC in; can be used as GPIO
6 A2 Analog ADC in; can be used as GPIO
7 A3 Analog ADC in; can be used as GPIO
8 A4/SDA Analog ADC in; I2C SDA; Can be used as GPIO (1)
9 A5/SCL Analog ADC in; I2C SCL; Can be used as GPIO (1)
10 A6 Analog ADC in; can be used as GPIO
11 A7 Analog ADC in; can be used as GPIO
12 VUSB Power In/Out Normally NC; can be connected to VUSB pin of the USB connector by shorting a jumper
13 RST Digital In Active low reset input (duplicate of pin 18)
14 GND Power Power Ground
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