ATMega328p Pinout Configuration, Features & Datasheet [A Quick Guide]

Hi friends welcome to the new post. Here we will learn ATMega328p Pinout Configuration, Features & Datasheet. Microcontrollers are the main component of electronic and automation circuits. The controller Atmega328P is important due to its flexible operation and is normally used in different embedded system applications. Here we will discuss its working, features, and other parameters. So let’s get started with ATMega328p Pinout Configuration.

Introuctiont to ATMega328p

• The ATmega328P is a low-power, CMOS eight-bit microcontroller that comes with RISC architecture. With the application of different commands in a single clock cycle, it helps to get one million instructions per second in megahertz.
• It helps to optimize the power used with processing speed. This board was made by Atmel now it belongs to Microchip technology.
• It is normally used due to used as the main control in different Arduini boards for example Arduino Pro Mini, Arduino UNO, etc.
• it has about 131 instructions mostly used in on clock cycle. From 16 MHz clock frequency, we can get about 16 MIPS throughput

Atmega328P PINout Configuration

There are different comes with 28 pinouts each with has certain function and all are explained here

Serial no	Pin name	Details	Function
1	PC6	PORTC PIn no 6	it is used as a reset pinout. For programming of RSTDIBL fuse this pin is used for input and output
2	PD0	PORTD pin Pin0	it is used for providing the input data to USART and also used for programming
3	PD1	PORTD Pin1	it is the output pin for USART also used for programming with used for External Interrupt 2 Input
4	PD2	PORTD Pin2	it is an External Interrupt source 0 pinout
5	PD3	PORTD pin no 3	It is External Interrupt source pin1 and OC2B
6	PD4	PORT D Pin4	it used as a Timer0 External Counter Input and USART External Clock I/O
7	VCC		it is attached with a positive voltage
8	GND		ground connection
9	PB6	PORT B pin 6	Chip Clock Oscillator pin 1 and  TOSC1
10	PB7	PORT B Pin7	it is XTAL2 (Chip Clock Oscillator pin 2) and TOSC2 (Timer Oscillator pin 2)
11	PD5	PORT D Pin5	it is Timer1 External Counter Input and OC0B(PWM – Timer/Counter0 Output Compare Match B Output)
12	PD6	PORT D Pin6	it is AIN0(Analog Comparator Positive I/P) and OC0A(PWM – Timer/Counter0 Output Compare Match A Output)
13	PD7	PORTD Pin7	it is an Analog Comparator Negative I/P
14	PB0	PPORT B pin 0	it is  Timer/Counter1 Input Capture Pin) and CLKO (Divided System Clock.
15	PB1	PORTB Pin1	it is  Timer/Counter1 Output Compare Match A Output
16	PB2	PORTB Pin2	it is the Slave Select Input pin, it’s low when the controller acts as a slave.
17	PB3	PORTB Pin3	Master Output Slave Input, controller works as slave data get this pin
18	PB4	PORTB Pin4	it is also Master Input Slave Output
19	PB5	PORTB Pin5	It is an SPI Bus Serial Clock and clock shared between this controller and another system for accurate data transfer.
20	AVCC		Power for Inner ADC Converter
21	AREF		Analog Reference Pin for ADC
22	GND		Ground connection made
23	PC0	PORTC Pin0	ADC Input Channel 0
24	PC1	PORTC Pin1	ADC Input Channel 1
25	PC2	PORTC Pin2	ADC Input Channel 2
26	PC3	PORTC Pin3	ADC Input Channel 3
27	PC4	PORTC Pin4	ADC Input Channel 4 and Two-wire Serial Bus Data Input/Output Line
28	PC5	PORTC Pin5	ADC Input Channel 5 and SCL

ATMEGA328P  Features

• It has an eight-bit AVR CPU
• 28oins configured on this module.
• its operating voltage is +1.8 V TO +5.5V.
• it has 23 programmable  I/O lines
• (17,18,19 PINS) are used as  Master/Slave SPI Serial Interface, (2,3 PINS) used as Programmable Serial USART, and  (27,28  PINS)  Two-wire Serial Interface.
• it does not have a JTAG Interface
• it has 6channels and 10-bit resolution ADC
• 12,13 PINS used as analog comparator
• 6 PWm configured on it
• it has 32Kbytes[10000 write/erase cycles] flash memory
• its CPU speed is 1MIPS for 1MHz
• Comes with 2Kbytes Internal SRAM
• it comes with a Programmable Watchdog Timer with a Separate On-chipOscillator
• its working temperature is  -40°C to +105°C.

ATmega328P IC Packages

The ATmega328P is available in 4 IC Packages. that are listed here

Package	Pinout
32-Lead TQFP	Slightly different
28-Pin SPDIP	Slightly different
32-Pad VQFN	Slightly different
28-Pad VQFN (MLF)	NaN

How to Use Atmega328P

• The uses of ATmega328P are like other controllers. Before it gets programmed. There are many software used to program this module.
• Commonly used controllers are Arduino board and Arduino software that is Arduino IDE used to program this controller.
• IDP programmer is also used for programming created for AVR controller called Atmel studio that can be downloaded free from Atmel codes in IDE or IDP programmer.

How to Safely Run Atmega328P 

• For the long-term operation of this model in different electronic projects, you must use it carefully since it is sensitive. Its input voltage must not be more than 5.5 volts. Check the voltage source output before making a connection.
• During connection on a breadboard or permanent connection in the circuit it is suggested to check the pinout for a short circuit before connecting power, best to use an IC socket for the integrated circuit and must check IC socket pinouts for short circuits before connection IC.
• IC socket also saves IC from getting heat from the soldering iron in the soldering process. Try to operate this module above the  -40 centigrade and above 105 centigrade.

Atmega328P Bootloader

The Atmega328P microcontroller’s bootloader software is embedded in a permanent memory unit that works as the initial stage for implementing additional software. its main work is to ready the controller for working, and make it easy to upload external programming devices without the use of code. During the reset state of Atmega328) this bootloader checks the existence of connected software. This integration program is easy to use and offered by Arduino, which uses  Atmega328P widely.

Where to Use ATMEGA328P

it is famous for its cost and easy-to-use featues. ARDDUINobaords are made on this module since it has different features explained here

• it has  32 Kbytes program memory, making it useful in different projects.
• It has different power-saving modes so used on MOBILE EMBEDDED SYSTEMS.
• Its Watchdog timer reset error so used with less chance of human interference
• With the latest RISC architectures controllers apply programs fastly
• it has a temperature sensor so easily used in extreme temperatures.