Adafruit ItsyBitsy M0 Express - for CircuitPython & Arduino IDE
Small ATSAMD21 Cortex-M0 board with 2MB SPI Flash supporting CircuitPython and Arduino IDE. Compact alternative to the Feather M0 Express where board area is constrained.
Pinout
- USBPower pins
MicroUSB 5V power pin output.
Type · USB - BATPower pins
Battery input from BAT pin.
Type · Power - 3VPower pins
3.3V regulator output.
Type · Power - GNDPower pins
Common ground.
Type · Ground - ENPower pins
Regulator enable; tie low to shut off regulator when on battery.
Type · Control - RSTControl pins
Reset pin; tie to ground to reset/enter bootloader.
Type · Control - A0Analog pins
Analog input A0 and DAC analog output.
Type · Analog - A1Analog pins
Analog input A1.
Type · Analog - A2Analog pins
Analog input A2.
Type · Analog - A3Analog pins
Analog input A3.
Type · Analog - A4Analog pins
Analog input A4.
Type · Analog - A5Analog pins
Analog input A5.
Type · Analog - SDAI2C pins
I2C hardware data pin.
Type · I2C - SCLI2C pins
I2C hardware clock pin.
Type · I2C - RXUART pins
Serial1 receive input, GPIO #0.
Type · UART - TXUART pins
Serial1 transmit output, GPIO #1.
Type · UART
| Pin | Position | Type | Function |
|---|---|---|---|
| USB | Power pins | USB | MicroUSB 5V power pin output. |
| BAT | Power pins | Power | Battery input from BAT pin. |
| 3V | Power pins | Power | 3.3V regulator output. |
| GND | Power pins | Ground | Common ground. |
| EN | Power pins | Control | Regulator enable; tie low to shut off regulator when on battery. |
| RST | Control pins | Control | Reset pin; tie to ground to reset/enter bootloader. |
| A0 | Analog pins | Analog | Analog input A0 and DAC analog output. |
| A1 | Analog pins | Analog | Analog input A1. |
| A2 | Analog pins | Analog | Analog input A2. |
| A3 | Analog pins | Analog | Analog input A3. |
| A4 | Analog pins | Analog | Analog input A4. |
| A5 | Analog pins | Analog | Analog input A5. |
| SDA | I2C pins | I2C | I2C hardware data pin. |
| SCL | I2C pins | I2C | I2C hardware clock pin. |
| RX | UART pins | UART | Serial1 receive input, GPIO #0. |
| TX | UART pins | UART | Serial1 transmit output, GPIO #1. |
Pin details
16 connections- USBPower pins
MicroUSB 5V power pin output.
USB - BATPower pins
Battery input from BAT pin.
Power - 3VPower pins
3.3V regulator output.
Power - GNDPower pins
Common ground.
Ground - ENPower pins
Regulator enable; tie low to shut off regulator when on battery.
Control - RSTControl pins
Reset pin; tie to ground to reset/enter bootloader.
Control - A0Analog pins
Analog input A0 and DAC analog output.
Analog - A1Analog pins
Analog input A1.
Analog - A2Analog pins
Analog input A2.
Analog - A3Analog pins
Analog input A3.
Analog - A4Analog pins
Analog input A4.
Analog - A5Analog pins
Analog input A5.
Analog - SDAI2C pins
I2C hardware data pin.
I2C - SCLI2C pins
I2C hardware clock pin.
I2C - RXUART pins
Serial1 receive input, GPIO #0.
UART - TXUART pins
Serial1 transmit output, GPIO #1.
UART
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