Atmega328p Pinout – Pin Details | New Topic [2024]

In this note, we are going to learn about Atmega328p Pinout and Pin Configuration of Atmega328p Microcontroller. Welcome to Poly Notes Hub, a leading destination for Diploma Engineering Notes for Polytechnic Students.

Author Name: Arun Paul.

What is Atmega328p Microcontroller?

The Atmel company, which is currently owned by Microchip Technology, produced the Atmega328p microcontroller chip. It is a popular microcontroller from the AVR family that is utilized in many different embedded systems and do-it-yourself electronics projects. Because of its adaptability, low power consumption, and simplicity of use, the Atmega328p is well-liked by both professionals and lovers of technology.

Important characteristics of the Atmega328p include:

• Architecture: It is built on the AVR 8-bit RISC architecture, with a Harvard architecture that includes distinct program and data memory.
• Memory: 32KB of Flash memory is used by the Atmega328p to store program code, 2KB of SRAM is used to store data, and 1KB of EEPROM is used to store non-volatile data.
• Clock Speed: It can run at speeds of up to 20 MHz, however it is typically utilized at slower speeds to save power.
• Peripherals: The chip contains a number of peripherals, including timers/counters, analog-to-digital converters (ADC), serial communication interfaces (USART, SPI, and I2C), and GPIO pins for connecting to other devices.
• Power Management: It has a variety of power-saving modes to reduce energy consumption, making it suited for battery-powered applications.
• Programming: The Atmega328p may be programmed using a variety of development tools and languages, including the Arduino IDE, which has greatly contributed to its popularity.

📌 In the below section, we are discussing the pin configuration of atmega328p microcontroller.

About Atmega328p Pinout

The Atmega328p microcontroller contains 28 pins, each with a specialized function for communicating with external components and peripherals. Here’s a brief of atmega328p pin configuration:.

1. Power Supply Pins
   • VCC (Pin 7): The supply voltage for the microcontroller, which is commonly 5V, is provided by this pin.
   • GND (Pin 8): This is the ground pin of the microcontroller.
2. Digital Input Output Pins
   • PORTB (Pins 14-19): These pins, which are part of Port B, are used for digital I/O.
   • PORTC (Pins 23-28): These pin are part of PORT C and also used as digital I/O.
   • PORTD (Pins 2-9): These pins are part of PORT D and are used as digital I/O pins.
3. Analog Input Pins
   • ADC Pins (Pins 23-28): This microcontroller has 6 analog pins which are basically used to read analog data of the sensors.
4. Communication Pins
   • TXD (Pin 2) and RXD (Pin 3): These pins are offers serial communication like wireless communication using BT module etc.
5. External Interrupt Pins
   • INT0 (Pin 4) and INT1 (Pin 5): These pins are allow microcontroller to interact with external interrupts.
6. Timer/Counter Pins
   • Timer/Counter Pins (Pins 11, 12, 13): These pins, which are connected to timers and counters, are essential for jobs needing exact timing.
7. Crystal Oscillator Pins
   • XTAL1 (Pin 9) and XTAL2 (Pin 10): To create a clock, these pins are connected to an external crystal oscillator.

Advantages

Below we listed some important advantages of this microcontroller –

• These microcontrollers are suitable for various applications such as remote car, automation system, and many electronics projects.
• This microcontroller is arduino compatible and user friendly.
• Can be use in single and multiple system.
• Easy to operate and program.
• It is also low power consumption microcontroller.

Applications

Below we listed some important use cases of this microcontroller –

• Used in a variety of embedded systems including consumer electronics, industrial automation, and automotive systems.
• Robots are controlled and automated for activities ranging from simple movements to complicated manipulations.
• Components for Internet of Things (IoT) devices such as smart home appliances, environmental sensors, and wearable devices.
• Data from sensors, meters, and other sources is recorded and stored for later analysis and monitoring.
• A popular choice for amateurs and manufacturers looking to create gadgets, toys, and inventive electronic projects.