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| Part Number | ATMEGA329P-20AN | 
| Datasheet | ATMEGA329P-20AN datasheet | 
| Description | IC MCU 8BIT 32KB FLASH 64TQFP | 
| Manufacturer | Microchip Technology | 
| Series | AVR® ATmega | 
| Part Status | Active | 
| Core Processor | AVR | 
| Core Size | 8-Bit | 
| Speed | 20MHz | 
| Connectivity | SPI, UART/USART, USI | 
| Peripherals | Brown-out Detect/Reset, LCD, POR, PWM, WDT | 
| Number of I/O | 54 | 
| Program Memory Size | 32KB (16K x 16) | 
| Program Memory Type | FLASH | 
| EEPROM Size | 1K x 8 | 
| RAM Size | 2K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 5.5V | 
| Data Converters | A/D 8x10b | 
| Oscillator Type | Internal | 
| Operating Temperature | -40°C ~ 105°C (TA) | 
| Package / Case | Surface Mount | 
| Supplier Device Package | 64-TQFP | 
| Base Part Number | 64-TQFP (14x14) |