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| Lead Time | 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks |
| Flash | 256K , 256K , 256K , 256K , 256K |
| SRAM | 64K , 64K , 64K , 64K , 64K |
| Data Flash | Configurable , Configurable , Configurable , Configurable , Configurable |
| LDROM | 4K , 4K , 4K , 4K , 4K |
| I/O | 55 , 55 , 55 , 55 , 55 |
| Timer | 4*32-bit , 4*32-bit , 4*32-bit , 4*32-bit , 4*32-bit |
| UART | 6 , 6 , 6 , 6 , 6 |
| SPI | 2 , 2 , 2 , 2 , 2 |
| I2C | 2 , 2 , 2 , 2 , 2 |
| PWM | 24*16-bit , 24*16-bit , 24*16-bit , 24*16-bit , 24*16-bit |
| ADC | 16*12-bit , 16*12-bit , 16*12-bit , 16*12-bit , 16*12-bit |
| Package | LQFP64(7x7mm) , LQFP64(7x7mm) , LQFP64(7x7mm) , LQFP64(7x7mm) , LQFP64(7x7mm) |
| Status | Mass Production , Mass Production , Mass Production , Mass Production , Mass Production |
| Comparator | 2 , 2 , 2 , 2 , 2 |
| RTC | Y , Y , Y , Y , Y |
| ISP /ICP /IAP | Yes , Yes , Yes , Yes , Yes |
| Operating Temp. Range (°C ) | -40 to +105 , -40 to +105 , -40 to +105 , -40 to +105 , -40 to +105 |
| IRC | 38.4kHz，48MHz , 38.4kHz，48MHz , 38.4kHz，48MHz , 38.4kHz，48MHz , 38.4kHz，48MHz |
| CRC | Y , Y , Y , Y , Y |
| I2S/ AC97 | 1 , 1 , 1 , 1 , 1 |
| PDMA | 7 , 7 , 7 , 7 , 7 |
| EBI | Yes , Yes , Yes , Yes , Yes |
The Nuvoton NuMicro® M031 series is 32-bit microcontrollers based on Arm® Cortex®-M0 CPU with 32-bit hardware multiplier/divider.
