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| SRAM | 8K |
| Data Flash | 4K |
| LDROM | 4K |
| I/O | 18 |
| Timer | 4*32-bit |
| UART | 1 |
| SPI | 2 |
| I2C | 1 |
| Status | Mass Production |
| ISP /ICP /IAP | Yes |
| Operating Temp. Range (°C ) | -40 to +85 |
| IRC | 22 MHz |
| USB | 1 |
The NUC120/123/220 series operates at 2.5V ~ 5.5V and - 40 ℃ ~ 105 ℃.
