SparkFun Qwiic Pro Micro - USB-C
Miniaturized Arduino-compatible board (ATmega32U4) with USB-C, Qwiic I2C connector, reset button, and castellated pads for direct PCB soldering. Native USB allows it to act as a HID device.
Pinout
- D1TXOedge castellated/header pad
Hardware UART transmit, digital I/O
Type · GPIOVoltage · logic I/O - D0RXIedge castellated/header pad
Hardware UART receive, digital I/O
Type · GPIOVoltage · logic I/O - GNDedge castellated/header pad
Ground
Type · GroundVoltage · 0V - GNDedge castellated/header pad
Ground
Type · GroundVoltage · 0V - D2edge castellated/header pad
Digital I/O, external interrupt INT1
Type · GPIOVoltage · logic I/O - D3edge castellated/header pad
Digital I/O/PWM, external interrupt INT0
Type · GPIOVoltage · logic I/O - D4edge castellated/header pad
Digital I/O
Type · GPIOVoltage · logic I/O - D5edge castellated/header pad
Digital I/O/PWM
Type · GPIOVoltage · logic I/O - D6edge castellated/header pad
Digital I/O/PWM
Type · GPIOVoltage · logic I/O - D7edge castellated/header pad
Digital I/O, external interrupt INT6
Type · GPIOVoltage · logic I/O - D8edge castellated/header pad
Digital I/O
Type · GPIOVoltage · logic I/O - D9edge castellated/header pad
Digital I/O/PWM
Type · GPIOVoltage · logic I/O - D10edge castellated/header pad
Digital I/O/PWM
Type · GPIOVoltage · logic I/O - D16MOSIedge castellated/header pad
SPI MOSI, digital I/O
Type · GPIO, SPIVoltage · logic I/O - D14MISOedge castellated/header pad
SPI MISO, digital I/O
Type · GPIO, SPIVoltage · logic I/O - D15SCKedge castellated/header pad
SPI clock, digital I/O
Type · GPIO, SPIVoltage · logic I/O - A0edge castellated/header pad
Analogue input, also digital I/O
Type · AnalogVoltage · logic I/O - A1edge castellated/header pad
Analogue input, also digital I/O
Type · AnalogVoltage · logic I/O - A2edge castellated/header pad
Analogue input, also digital I/O
Type · AnalogVoltage · logic I/O - A3edge castellated/header pad
Analogue input, also digital I/O
Type · AnalogVoltage · logic I/O - D2SDAQwiic connector and board pad
I2C data on Qwiic/header net
Type · GPIO, I2CVoltage · logic I/O - D3SCLQwiic connector and board pad
I2C clock on Qwiic/header net
Type · GPIO, I2CVoltage · logic I/O - RAWedge castellated/header pad
Raw external supply input
Type · PowerVoltage · up to 6V external input - VCC5V or 3.3Vedge castellated/header pad
Regulated board logic rail, jumper-selectable
Type · PowerVoltage · 5V default or 3.3V - RSTedge castellated/header pad
Reset input
Type · ControlVoltage · active low reset
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| D1TXO | edge castellated/header pad | GPIO | Hardware UART transmit, digital I/O | logic I/O |
| D0RXI | edge castellated/header pad | GPIO | Hardware UART receive, digital I/O | logic I/O |
| GND | edge castellated/header pad | Ground | Ground | 0V |
| GND | edge castellated/header pad | Ground | Ground | 0V |
| D2 | edge castellated/header pad | GPIO | Digital I/O, external interrupt INT1 | logic I/O |
| D3 | edge castellated/header pad | GPIO | Digital I/O/PWM, external interrupt INT0 | logic I/O |
| D4 | edge castellated/header pad | GPIO | Digital I/O | logic I/O |
| D5 | edge castellated/header pad | GPIO | Digital I/O/PWM | logic I/O |
| D6 | edge castellated/header pad | GPIO | Digital I/O/PWM | logic I/O |
| D7 | edge castellated/header pad | GPIO | Digital I/O, external interrupt INT6 | logic I/O |
| D8 | edge castellated/header pad | GPIO | Digital I/O | logic I/O |
| D9 | edge castellated/header pad | GPIO | Digital I/O/PWM | logic I/O |
| D10 | edge castellated/header pad | GPIO | Digital I/O/PWM | logic I/O |
| D16MOSI | edge castellated/header pad | GPIO, SPI | SPI MOSI, digital I/O | logic I/O |
| D14MISO | edge castellated/header pad | GPIO, SPI | SPI MISO, digital I/O | logic I/O |
| D15SCK | edge castellated/header pad | GPIO, SPI | SPI clock, digital I/O | logic I/O |
| A0 | edge castellated/header pad | Analog | Analogue input, also digital I/O | logic I/O |
| A1 | edge castellated/header pad | Analog | Analogue input, also digital I/O | logic I/O |
| A2 | edge castellated/header pad | Analog | Analogue input, also digital I/O | logic I/O |
| A3 | edge castellated/header pad | Analog | Analogue input, also digital I/O | logic I/O |
| D2SDA | Qwiic connector and board pad | GPIO, I2C | I2C data on Qwiic/header net | logic I/O |
| D3SCL | Qwiic connector and board pad | GPIO, I2C | I2C clock on Qwiic/header net | logic I/O |
| RAW | edge castellated/header pad | Power | Raw external supply input | up to 6V external input |
| VCC5V or 3.3V | edge castellated/header pad | Power | Regulated board logic rail, jumper-selectable | 5V default or 3.3V |
| RST | edge castellated/header pad | Control | Reset input | active low reset |
Pin details
25 connections- D1TXOedge castellated/header pad
Hardware UART transmit, digital I/O
GPIOVoltage · logic I/O - D0RXIedge castellated/header pad
Hardware UART receive, digital I/O
GPIOVoltage · logic I/O - GNDedge castellated/header pad
Ground
GroundVoltage · 0V - GNDedge castellated/header pad
Ground
GroundVoltage · 0V - D2edge castellated/header pad
Digital I/O, external interrupt INT1
GPIOVoltage · logic I/O - D3edge castellated/header pad
Digital I/O/PWM, external interrupt INT0
GPIOVoltage · logic I/O - D4edge castellated/header pad
Digital I/O
GPIOVoltage · logic I/O - D5edge castellated/header pad
Digital I/O/PWM
GPIOVoltage · logic I/O - D6edge castellated/header pad
Digital I/O/PWM
GPIOVoltage · logic I/O - D7edge castellated/header pad
Digital I/O, external interrupt INT6
GPIOVoltage · logic I/O - D8edge castellated/header pad
Digital I/O
GPIOVoltage · logic I/O - D9edge castellated/header pad
Digital I/O/PWM
GPIOVoltage · logic I/O - D10edge castellated/header pad
Digital I/O/PWM
GPIOVoltage · logic I/O - D16MOSIedge castellated/header pad
SPI MOSI, digital I/O
GPIO, SPIVoltage · logic I/O - D14MISOedge castellated/header pad
SPI MISO, digital I/O
GPIO, SPIVoltage · logic I/O - D15SCKedge castellated/header pad
SPI clock, digital I/O
GPIO, SPIVoltage · logic I/O - A0edge castellated/header pad
Analogue input, also digital I/O
AnalogVoltage · logic I/O - A1edge castellated/header pad
Analogue input, also digital I/O
AnalogVoltage · logic I/O - A2edge castellated/header pad
Analogue input, also digital I/O
AnalogVoltage · logic I/O - A3edge castellated/header pad
Analogue input, also digital I/O
AnalogVoltage · logic I/O - D2SDAQwiic connector and board pad
I2C data on Qwiic/header net
GPIO, I2CVoltage · logic I/O - D3SCLQwiic connector and board pad
I2C clock on Qwiic/header net
GPIO, I2CVoltage · logic I/O - RAWedge castellated/header pad
Raw external supply input
PowerVoltage · up to 6V external input - VCC5V or 3.3Vedge castellated/header pad
Regulated board logic rail, jumper-selectable
PowerVoltage · 5V default or 3.3V - RSTedge castellated/header pad
Reset input
ControlVoltage · active low reset
Start wiring
USB · 5 V · 3.3 V
Confirm the data interface matches your host board.
Module pins: GND, RAW, VCC / 5V or 3.3V, MOSI / D16, MISO / D14, SCK / D15, SDA / D2, SCL / D3. Schematik maps them to your board in the app.
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