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| SRAM | 4K |
| Data Flash | Configurable |
| LDROM | 2K |
| I/O | 23 |
| Timer | 4*32-bit |
| UART | 3 |
| SPI | 1 |
| I2C | 2 |
| PWM | 6*16-bit |
| ADC | 9*12-bit |
| Status | Mass Production |
| ISP /ICP /IAP | Yes |
| Operating Temp. Range (°C ) | -40 to +105 |
| IRC | 38.4kHz，48MHz |
| CRC | Y |
| I2S/ AC97 | 1 |
| PDMA | 2 |
The Nuvoton NuMicro® M031 series is 32-bit microcontrollers based on Arm® Cortex®-M0 CPU with 32-bit hardware multiplier/divider.
