Today we discuss about Atmega328 or Atmega328p microcontroller and its pin configuration or pin details. Welcome to Poly Notes Hub, the one and only stop for diploma engineering notes since 2022.
Introduction
Microcontrollers are essential in the dynamic world of electronics and embedded systems. The Atmega328 microcontroller stands out among them as a functional and popular component. Understanding the Atmega328 and its pin configuration is crucial whether you’re a seasoned engineer or a hobbyist wishing to delve into the realm of microcontrollers. We’ll examine more closely at this microcontroller, its features, and how to use it for your projects in this extensive guide.
What is Atmega328p Microcontroller?
A high-performance microcontroller chip called the Atmega328 was created by Atmel, which is now a division of Microchip Technology Inc. The Atmel AVR microcontroller family includes this little but potent chip, which has achieved enormous appeal for usage in a variety of applications, including robotics, automation, Internet of Things devices, and more.
Electrically Erasable Programmable Read-Only Memory (EEPROM) on the ATmega328 is 1KB. This feature demonstrates that the microcontroller can still store data and provide outcomes after receiving an electric source, even if the electric supply is disconnected. Additionally, the ATmega-328 contains 2KB of static random access memory. Later explanations will cover additional traits. The Atmega 328 is the most well-liked product on the market right now thanks to a variety of features.
These features include flexible Serial USART, advanced RISC architecture, good performance, low power consumption, real timer clock with a separate oscillator, six PWM pins, programming lock for software security, throughput up to 20 MIPS, etc. Later in this section, more information regarding the Atmega 328 will be provided.
Key features of Atmega328p
These are the features of the atmega328 microcontroller
- High Performance
- Low Power Consumption
- Fully Static Operation
- Advance RISC Architechture
- It contains 2KB of SRAM
- Also has 32KB Flash Memory
- It has EEPROM of 1KB
Atmega328p Pinout
It is essential to comprehend the Atmega328’s pinout in order to connect it to peripherals and external components. The DIP (Dual In-line Package) and SMD (Surface Mount Device) packaging for this microcontroller each have their own pin configuration. The DIP package, which is frequently seen in development boards like the Arduino Uno.
Power Supply Pin
- 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.
Digital I/O Pins
The Atmega328 features 14 digital I/O pins, labeled as follows:
- 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.
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.
Communication Pins
TXD (Pin 2) and RXD (Pin 3): These pins are offers serial communication like wireless communication using BT module etc.
External Interrupt Pins
INT0 (Pin 4) and INT1 (Pin 5): These pins are allow microcontroller to interact with external interrupts.
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.
Crystal Oscillator Pins
XTAL1 (Pin 9) and XTAL2 (Pin 10): To create a clock, these pins are connected to an external crystal oscillator.
These pins are crucial for configuring the Atmega328P to carry out different duties in your projects as well as for attaching it to peripherals and other external components. Effective programming and interface design for microcontrollers require a solid understanding of their functionalities.
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