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| Seeeduino XIAO | Arduino Nano |
| CPU | ARM Cortex-M0 + CPU (SAMD21G18) | Atmel Atmega328 |
| SRAM | 32 KB | 2 KB |
| Flash闪存 | 256 KB | 32 KB |
| 工作电压 | 3.3 V/5 V直流 | 5 V |
| 尺寸 | 20 × 17.5 × 3.5 mm | 47 × 18.5 × 18.5 mm |