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| Lead Time | 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks |
| Flash | 16K , 16K , 16K , 16K , 16K |
| SRAM | 2K , 2K , 2K , 2K , 2K |
| Data Flash | Configurable , Configurable , Configurable , Configurable , Configurable |
| LDROM | 2K , 2K , 2K , 2K , 2K |
| I/O | 15 , 15 , 15 , 15 , 15 |
| Timer | 2*32-bit , 2*32-bit , 2*32-bit , 2*32-bit , 2*32-bit |
| UART | 3 , 3 , 3 , 3 , 3 |
| SPI | 1 , 1 , 1 , 1 , 1 |
| I2C | 2 , 2 , 2 , 2 , 2 |
| PWM | 6*16-bit , 6*16-bit , 6*16-bit , 6*16-bit , 6*16-bit |
| ADC | 7*12-bit , 7*12-bit , 7*12-bit , 7*12-bit , 7*12-bit |
| Package | TSSOP20 , TSSOP20 , TSSOP20 , TSSOP20 , TSSOP20 |
| Status | Mass Production , Mass Production , Mass Production , Mass Production , Mass Production |
| 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 |
The Nuvoton NuMicro® M031 series is 32-bit microcontrollers based on Arm® Cortex®-M0 CPU with 32-bit hardware multiplier/divider.
