Seeed Studio XIAO SAMD21 Developer Board
Seeed Studio XIAO SAMD21 overview
The Seeed Studio XIAO SAMD21 is a Developer Board. Main ratings: CPU ARM Cortex-M0+ CPU(SAMD21G18) running at up to 48MHz; Storage 256KB Flash,32KB SRAM; I/O PINs 14 GPIO PINs,11 analog PINs, 11 digital PINs, 1 DAC output Pin; Interface 1 I2C interface,1 UART interface, 1 SPI interface. This page brings together the Seeed Studio XIAO SAMD21 pinout and key specifications, with the full datasheet PDF to preview below or download.
Seeed Studio XIAO SAMD21 is the pioneer, universal development board, extremely popular around the communities and derived a sight of projects. Seeed Studio XIAO SAMD21 carries the powerful CPU-ARM® Cortex®-M0+(SAMD21G18) running at up to 48Hz. In addition to the powerful CPU, it has 256KB Flash and 32KB SRAM on board and supports the USB Type-C interface which can supply power and download code.
Seeed Studio XIAO SAMD21 Developer Board has 14 GPIO PINs, which can be used for 11 analog PINs, 11 digital PINs, 1 I2C interface, 1 UART interface, and 1 SPI interface. The Board's A1/D1 to A10/D10 Pins have PWM functions and Pin A0/D0 has a function of DAC, meaning that you can get true analog signals, not PWM signals when you define it as an analog pin, that’s why 14 GPIO PINs can realize more I/O PINs and interfaces.
Key specifications
Datasheet
Seeed Studio XIAO SAMD21 features
- High Performance: Powered by SAMD21G18 chip, operating up to 48MHz, equipped with 32KB of SRAM, and 256KB of onboard flash memory
- Ultra-small Design: 21 x 17.5mm, Seeed Studio XIAO series classic form-factor, suitable for wearable devices
- Multiple Development Interfaces: 11x analog / 11x digital Pins, 1x I2C interface, 1x UART port, and 1 SPI port
- Multiple Develop Platform: Support Arduino / Micropython / Circuit Python development, friendly for beginners, satisfied for electronics enthusiasts
- Perfect for Production: Breadboard-friendly & SMD design, no components on the back
Seeed Studio XIAO SAMD21 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | D0 | A0/D0/DAC |
| 2 | D1 | A1/D1 |
| 3 | D2 | A2/D2 |
| 4 | D3 | GPIO5/A3/D3 |
| 5 | D4 | GPIO6/SDA/D4 |
| 6 | D5 | GPIO7/SCL/D5 |
| 7 | D6 | GPIO21/TX/D6 |
| 8 | D7 | GPIO20/RX/D7 |
| 9 | D8 | GPIO8/SCK/D8 |
| 10 | D9 | GPIO9/MISO/D9 |
| 11 | D10 | GPIO10/MOSI/D10 |
| 12 | 3.3V | 3.3V |
| 13 | GND | Ground pin |
| 14 | 5V | 5V Supply |
Seeed Studio XIAO SAMD21 applications
- Rapid prototyping (directly attached to the expanded PCB as a minimal system)
- Perfect for all the projects that need a mini Arduino
- DIY keyboard
- Wearable devices
- Wireless connect
- Embedded machine learning projects
- USB development (USB to multi-channel TTL/USB host mode, etc.)
- In a scenario where you need to read multiple mock values The DAC output
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