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120MHz M4 in Arduino form factor
| Part number | Adafruit Metro M4 Express |
|---|---|
| Category | Development Boards › SAMD / SAM Boards |
| Package | Module |
| Pins | 32 |
| Frequency | 120 MHz |
Adafruit Metro M4 Express pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | NC | nc | |
| 2 | IOREF | power | |
| 3 | RESET | bidirectional | |
| 4 | 3V3 | power | |
| 5 | 5V | power | |
| 6 | GND | ground | |
| 7 | GND | ground | |
| 8 | VIN | power | |
| 9 | A0 | bidirectional | |
| 10 | A1 | bidirectional | |
| 11 | A2 | bidirectional | |
| 12 | A3 | bidirectional | |
| 13 | A4 | bidirectional | |
| 14 | A5 | bidirectional | |
| 15 | D0/RX | bidirectional | |
| 16 | D1/TX | bidirectional | |
| 17 | D2 | bidirectional | |
| 18 | D3 | bidirectional | |
| 19 | D4 | bidirectional | |
| 20 | D5 | bidirectional | |
| 21 | D6 | bidirectional | |
| 22 | D7 | bidirectional | |
| 23 | D8 | bidirectional | |
| 24 | D9 | bidirectional | |
| 25 | D10 | bidirectional | |
| 26 | D11 | bidirectional | |
| 27 | D12 | bidirectional | |
| 28 | D13/SCK | bidirectional | |
| 29 | GND | ground | |
| 30 | AREF | bidirectional | |
| 31 | SDA | bidirectional | |
| 32 | SCL | bidirectional |
Schematic symbol and footprint
Schematic symbol
Footprint: Arduino UNO R3 shield headers — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.
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