Характеристики
| Device Core | AVR |
| Data Bus Width bit | 8 |
| Instruction Set Architecture | RISC |
| Family Name | ATmega |
| Clock Frequency Max. MHz | 20 |
| Program Memory Type | Flash |
| Program Memory Size KB | 64 |
| Data Memory Size KB | 2 |
| RAM Memory Size KB | 4 |
| Interfaces | I²C |
| Interfaces | SPI |
| Interfaces | UART |
| ADC Channels | 8 |
| ADC Resolution bit | 10 |
| DAC Resolution bit | 10 |
| Os | 32 |
| Counters | 3 |
| Comparators | 1 |
| Supply Voltage Min. V | 1.8 |
| Supply Voltage Max. V | 5.5 |
| Operating Temperature Min. °C | -40 |
| Operating Temperature Max. °C | 85 |
| Package Type | TQFP |
| Pins | 44 |
| Mounting Type | SMD |
| Packaging | Tray |
| Length mm | 10 |
| Width mm | 10 |
| Height mm | 1 |
ATMEGA644PA-AUMicrochipMicrocontrollers