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| Core Processor | AVR |
| Program Memory Type | FLASH |
| Online Catalog | AVR® ATmega 64KB Flash |
| Supplier Device Package | 44-VQFN (7x7) |
| EEPROM Size | 2K x 8 |
| Package / Case | 44-VFQFN Exposed Pad |
| PCN Packaging | Tape and Reel Label Update 10/Feb/2015 Transfer to Microchip/Label/Pkg 5/Sep/2016 |
| Video File | Introducing Atmel Studio 7 |
| Manufacturer | Microchip Technology |
| Design Resources | Development Tool Selector |
| Voltage - Supply (Vcc/Vdd) | 1.8 V ~ 5.5 V |
| Other Names | ATMEGA644PA-MNRDKR |
| Speed | 20MHz |
| Operating Temperature | -40°C ~ 105°C (TA) |
| Datasheets | ATMEGA164,324,644,1284(A,P,PA) Datasheet ATMEGA164,324,644,1284(A,PA,P) Summary |
| Categories | Integrated Circuits (ICs) |
| RAM Size | 4K x 8 |
| PCN Other | MSL Update 26/Feb/2014 |
| Number of I/O | 32 |
| Product Training Modules | MCU Product Line Introduction megaAVR Introduction Software Framework (ASF) Example of Use Studio Introduction to Software Framework (ASF) Studio Development Environment Overview Part 1 |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Oscillator Type | Internal |
| Standard Package | 1 |
| Series | AVR® ATmega |
| Core Size | 8-Bit |
| Featured Product | Atmel - megaAVR Microcontrollers PIC and AVR MCUs |
| Packaging | Digi-Reel® |
| Part Status | Active |
| Connectivity | I²C, SPI, UART/USART |
| Program Memory Size | 64KB (32K x 16) |
| Data Converters | A/D 8x10b |
