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| Lead Time | 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks |
| Flash | 256K , 256K , 256K , 256K , 256K |
| SRAM | 32K , 32K , 32K , 32K , 32K |
| Data Flash | Configurable , Configurable , Configurable , Configurable , Configurable |
| LDROM | 4K , 4K , 4K , 4K , 4K |
| I/O | 39 , 39 , 39 , 39 , 39 |
| Timer | 4*32-bit , 4*32-bit , 4*32-bit , 4*32-bit , 4*32-bit |
| UART | 4 , 4 , 4 , 4 , 4 |
| SPI | 2 , 2 , 2 , 2 , 2 |
| I2C | 2 , 2 , 2 , 2 , 2 |
| PWM | 12*16-bit , 12*16-bit , 12*16-bit , 12*16-bit , 12*16-bit |
| ADC | 8*12-bit， Vref , 8*12-bit， Vref , 8*12-bit， Vref , 8*12-bit， Vref , 8*12-bit， Vref |
| ISP/ICP/IAP | Yes , Yes , Yes , Yes , Yes |
| Package | LQFP48 , LQFP48 , LQFP48 , LQFP48 , LQFP48 |
| Status | Mass Production , Mass Production , Mass Production , Mass Production , Mass Production |
| Comparator | 2 , 2 , 2 , 2 , 2 |
| RTC | Y(Vbat) , Y(Vbat) , Y(Vbat) , Y(Vbat) , Y(Vbat) |
| ISO-7816-3 | 1 , 1 , 1 , 1 , 1 |
| DAC | 1*12-bit , 1*12-bit , 1*12-bit , 1*12-bit , 1*12-bit |
| I2S/ AC97 | 2 , 2 , 2 , 2 , 2 |
| PDMA | 12 , 12 , 12 , 12 , 12 |
| EBI | Yes , Yes , Yes , Yes , Yes |
| LIN | 2 , 2 , 2 , 2 , 2 |
| Voltage Adjustable Interface | Y , Y , Y , Y , Y |
| Tamper Detect (pin) | 1 , 1 , 1 , 1 , 1 |
| Operating Temp. Range (¢FXC ) | -40 to +105 , -40 to +105 , -40 to +105 , -40 to +105 , -40 to +105 |
The NuMicro M451 Base series 32-bit microcontroller ( MCU ) is embedded with the ARM® Cortex®-M4 core.
