NANO 33 IoT specs, pinout & datasheets
- Chip / SoC
- ATSAMD21G18
- CPU
- Arm Cortex-M0+
- Clock
- 48 MHz
- RAM
- 32 KB
- Flash
- 256 KB
Imported entry: generated from open-source board definitions (platformio, zephyr, circuitpython), not reviewed by a person. Each fact links to the definition it came from.
Specifications
- Chip / SoC
- ATSAMD21G18[1]
- CPU
- Arm Cortex-M0+[1]
- Clock
- 48 MHz[1]
- RAM
- 32 KB[2]
- Flash
- 256 KB[2]
- Upload limits
- 256 KB flash, 32 KB RAM[1]
Upload limits are what a sketch or firmware may use after the bootloader, as the build tools enforce them, not the chip’s full memory.
Can I still use it?
- Arduino framework
- Supported[1]Arduino framework available through PlatformIO.
- CircuitPython
- Supported[3]
- Zephyr RTOS
- Supported[2]
As published by each project, checked weekly. A platform not listed has no published information here, which is not the same as no support.
Datasheets and documents
Pinout
Pin names in firmware (22 pins)
| Chip pin | Board names |
|---|---|
| PA02 | A0 |
| PA04 | D6 |
| PA05 | D5 |
| PA06 | D7 |
| PA07 | D4 |
| PA09 | A6 |
| PA10 | A3 |
| PA11 | A2 |
| PA16 | D11, MOSI |
| PA17 | D13, SCK, LED |
| PA18 | D8 |
| PA19 | D12, MISO |
| PA20 | D9 |
| PA21 | D10 |
| PB02 | A1 |
| PB03 | A7 |
| PB08 | A4, SDA |
| PB09 | A5, SCL |
| PB10 | D2 |
| PB11 | D3 |
| PB22 | D1, TX |
| PB23 | D0, RX |
Sources
Spotted a mistake?
Every report is read by a person and checked against a source before anything changes. Please link one if you have it.