Adafruit Metro M0 Express SAMD21 Microcontroller Board Products

Description

The Adafruit METRO M0 Express microcontroller board can be programmed in Arduino, CircuitPython, and MicroPython. The board has a form factor similar to the Arduino Uno R3, but with more processing power, memory, and I/O.

Processor

The board features is a ATSAMD21G18 Single-Core 32-bit ARM Cortex-M0+ processor clocked at 48MHz. The processor also includes low power idle and standby sleep modes.

Memory

• 32KB of SRAMStatic Random Access Memory (16x more than the Atmega328P)
• 256KB of Flash (8x more than the Atmega328P)
• 2MB SPISerial Peripheral Interface Flash chip
• No EEPROMElectrically Erasable Programmable Read-Only Memory

I/OInput/Output

• 25x Digital I/O and PWMPulse-Width Modulation (3.3V Logic)
• 12-Channel 12-bit ADCAnalog-to-Digital Converter (ADC, A/D, or A-to-D) 350ksps (3.3V Max). There are six dedicated analog pins A0 - A5 and the other 6 are on digital pins.
• 1-Channel 10-bit DACDigital-to-Analog Converter (DAC, D/A, or D-to-A) 350ksps (3.3V Max) using the analog or digital pins.
• Communication interfaces: UARTUniversal Asynchronous Receiver-Transmitter, I2CInter-Integrated Circuit. Also referred to as IIC or I²C., SPISerial Peripheral Interface, I2SInter-IC Sound, and LINLocal Interconnect Network
• Built-in USB 2.0 Full/Low speed

User Interface

• 1x reset button
• 4x indicator LEDs
• 1x NeoPixel RBG LED

The reset button and LEDs are located on the front edge of the PCB. The 4x indicator LEDs consists of a green power LED (labeled On), two RXReceive/TXTransmit LEDs for data being sent over USB, and a red LED (labeled L) connected to GPIO #13 pin. The RGB NeoPixel (labeled 40) is connected to GPIO #40 pin and can be used for any purpose.

Power

The board can be powered with 7V to 9V polarity protected DC using the barrel jack or a 5V USB source using the micro USB connector. The DC Jack is a 2.1mm x 5.5mm center-positive DC connector and has switch next to it so you can turn off your setup easily. The board will automatically switch between USB and DC.

Board Size

71mm x 53mm (2.8in x 2.1in)

Documentation

Adafruit has a guide to the Metro M0 Express that includes the board pinout, UF2UF2 is a firmware file format developed by Microsoft that allows for flashing microcontrollers over USB. It appears as a Mass Storage Device (USB Drive) when attached to your computer, so you can copy firmware to a USB drive instead of having to burn it using other tools. Bootloader details, and code examples in Arduino and CircuitPython.

• Adafruit Primary Guide to the Metro M0 Express
• Metro M0 Express Board Pinout
• ATSAMD21G18 Datasheet (PDF)

Adafruit Metro M0 Board

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Adafruit 3505 Metro M0 Express ATSAMD21G18 Microcontroller Board

Package includes:

• 1x METRO M0 Express Board

Price: $24.95(Updated 10Aug2024 08:45:112024-08-10T08:45:11Z UTC UTC)

Adafruit.com

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Adafruit 3505 Metro M0 Express ATSAMD21G18 Microcontroller Board

Package includes:

• 1x METRO M0 Express Board

Price: $23.99(Updated 08Aug2024 00:35:132024-08-08T00:35:13Z UTC UTC)

Amazon.com (Affiliate Link ⓘAs an Amazon associate I earn from qualifying purchases. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.)

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