Editing: ATMEGA328P-AU

Field: AI Skill Technical Reference

# ATMEGA328P-AU — 8-bit AVR MCU, 20MHz, 32KB Flash, TQFP-32

**Manufacturer:** Microchip
**Package:** TQFP-32

## Description

The ATMEGA328P is an 8-bit AVR microcontroller from Microchip (formerly Atmel). It features 32KB Flash, 2KB SRAM, 1KB EEPROM, and is the heart of the Arduino Uno platform.

## Electrical Specifications

- **Core**: AVR 8-bit
- **Flash**: 32KB
- **SRAM**: 2KB
- **EEPROM**: 1KB
- **Clock**: Up to 20MHz
- **I/O**: 23 GPIO
- **ADC**: 8ch 10-bit
- **Interfaces**: SPI, I2C, USART
- **Package**: TQFP-32

## Pin Configuration

Package: TQFP-32

- Pin 1: PD3 — Port D3 / INT1 / OC2B
- Pin 2: PD4 — Port D4 / T0 / XCK
- Pin 3: GND — Ground
- Pin 4: VCC — Supply voltage (1.8V-5.5V)
- Pin 5: GND — Ground
- Pin 6: VCC — Supply voltage
- Pin 7: PB6 — Port B6 / XTAL1 / TOSC1
- Pin 8: PB7 — Port B7 / XTAL2 / TOSC2
- Pin 9: PD5 — Port D5 / T1 / OC0B
- Pin 10: PD6 — Port D6 / AIN0 / OC0A
- Pin 11: PD7 — Port D7 / AIN1
- Pin 12: PB0 — Port B0 / ICP1 / CLKO
- Pin 13: PB1 — Port B1 / OC1A
- Pin 14: PB2 — Port B2 / SS / OC1B
- Pin 15: PB3 — Port B3 / MOSI / OC2A
- Pin 16: PB4 — Port B4 / MISO
- Pin 17: PB5 — Port B5 / SCK
- Pin 18: AVCC — Analog supply voltage
- Pin 19: ADC6 — Analog input channel 6
- Pin 20: AREF — Analog reference
- Pin 21: GND — Analog ground
- Pin 22: ADC7 — Analog input channel 7
- Pin 23: PC0 — Port C0 / ADC0
- Pin 24: PC1 — Port C1 / ADC1
- Pin 25: PC2 — Port C2 / ADC2
- Pin 26: PC3 — Port C3 / ADC3
- Pin 27: PC4 — Port C4 / ADC4 / SDA
- Pin 28: PC5 — Port C5 / ADC5 / SCL
- Pin 29: PC6 — Port C6 / RESET
- Pin 30: PD0 — Port D0 / RXD
- Pin 31: PD1 — Port D1 / TXD
- Pin 32: PD2 — Port D2 / INT0

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