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Board overview
Seeed Studio XIAO SAMD21
Seeed Studio · XIAO
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Showing 14 of 14 pins
Simplified technical illustration. Pin data is source-backed; verify against the linked documentation before wiring.
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Mapped source · Seeed XIAO SAMD21 wikiOfficial- USB-C at top, component side up; labels follow Seeed's XIAO SAMD21 (Seeeduino XIAO) pin table.
- GPIO is 3.3 V only and is not 5 V tolerant.
- All of D0-D10 are ADC-capable analog inputs; D0 (PA02) is also the true DAC output.
All 14 pins
| # | Signal | Role | Net | Also / notes |
|---|---|---|---|---|
| 1 | ADC | PA02 / DAC | ||
| 2 | ADC | PA04 | ||
| 3 | ADC | PA10 | ||
| 4 | ADC | PA11 | ||
| 5 | I2C | I2C | PA08 | |
| 6 | I2C | I2C | PA09 | |
| 7 | UART | UART | PB08 | |
| 14 | Power | 5V | ||
| 13 | Ground | GND | ||
| 12 | Power | 3V3 | ||
| 11 | SPI | SPI | PA06 | |
| 10 | SPI | SPI | PA05 | |
| 9 | SPI | SPI | PA07 | |
| 8 | UART | UART | PB09 |