Arduino uno is named for marking the upcoming release of microcontroller board namely arduino uno board 1. The exact part number of this chip is atmega328ppu as found printed on the top of the chip. By executing powerful instructions in a single clock cycle, the atmega328pb achieves throughputs close to 1mips per mhz. Arduino uno is a microcontroller board based on the atmega328p datasheet. It has 14 digital io pins, of which 6 can be used as pwm outputs and 6 analog input pins. Atmega328 is an atmel microcontroller, which is used in arduino uno board. It also has 6 pwm outputs multiplexed on to the digital io pins. Port pins metrical drive characteristics with both high sink and source capability. Introduction to atmega8 microcontroller architecture and its. Many pins of the chip here have more than one function. When i tried connecting it the same with my reference without looking at the pin description im only having black box in the lcd after uploading a. Pricing and availability on millions of electronic components from digikey electronics. The arduino uno is a microcontroller board based on the atmega328 datasheet.
Analog inputs can be used in the operating range of 0 to 5v. Atmega 328 pinout diagram is shown in the figure given below. Today, i am going to give you a detailed introduction to arduino nano. Atmega328p pinout diagram, pin configuration, brief. If you are unsure or just want to see the pin out for the atmega328 ic, refer to the diagram below, or you can view the. It is the most popular of all avr controllers as it is used in arduino boards. Arduino uno is based on atmega328p atmel avr family microcontroller mcu. First arduino project was started in interaction design institute ivrea in 2003 by david cuartielles and massimo banzi with the intention of providing a cheap and flexible way to students and. Atmega328pu microchip technology microcontroller by. Atmega328p microcontroller pinout, pin configuration. It has a 16 kb programmable flash memory, static ram of 1 kb and eeprom of 512 bytes. And, finally, the reset pin on the arduino uno is connected to the reset pin on pin 1 of the atmega328. Programming on page 241 contains a detailed description on flash. Today we are going discuss its pinout diagram or pin configuration, uses, description, datasheet.
It contains everything needed to support the microcontroller, simply connect it to. Arrow electronics is a certified microchip distributor, offering a variety of products. Port a serves as the analog inputs to the ad converter. Introduction to arduino uno the engineering projects. This board includes digital io pins14, a power jack, analog ips6, ceramic resonatora16 mhz, a usb connection, an rst button, and an icsp header. You can use the 5volt output and ground connections on the arduino uno to power your breadboard, you dont need a seperate power supply. Atmega328 is an 8bit and 28 pins avr microcontroller, manufactured by. Programmed via a standard usb connector, the uno integrates the atmega328 onto a board with io headers to provide an easytouse platform for programming the atmega328. Atmega328pb datasheet introduction the picopower atmega328pb is a lowpower cmos 8bit microcontroller based on the avr enhanced risc architecture. In short an atmega328 is a microcontroller chip found on arduino uno boards. Lecture 6 introduction to the atmega328 and ardunio.
Microcontroller, avr microcontroller, 8bit microcontroller. Aref is the analog reference pin for the ad converter. Jan 27, 2017 arduino uno is based on atmega328p atmel avr family microcontroller mcu. Pinout description of avr microcontroller port a pa7pa0. The table below gives a description for each of the pins, along with their function. The atmega8 microcontroller consists of 28 pins where pins 9,10,14,15,16,17,18,19 are used for port b, pins 23,24,25,26,27,28 and 1 are used for port c and pins 2,3,4,5,6,11,12 are.
If the adc is used, it should be connected to v cc through a lowpass filter. Arduino atmega328 microcontroller board consist of 6 analog inputs pins. The atmega328pu comes in an pdip 28 pin package and is suitable for use on our 28 pin avr development board. Explain the general architecture of a microcontroller list the key features of the atmega328 microcontroller explain the features and elements of the arduino and spartronics experimenter shield ses explain the concepts of microcontroller pins as inputs and outputs convert between binary and hexadecimal digits. Atmega328 8bit avr mcus microchip technology mouser. Port c is an analogue port and it has six pins in total. Introduction to arduino nano the engineering projects. These pins are powered from the analog supply and serve as 10bit adc channels. Port a also serves as an 8bit bidirectional io port, if the ad converter is not used. It has 3 ports in total which are named as port b, port c and port d. Avr atmega8 microcontrollerfeatures and block diagram. Im using this as a reference in connecting lcd and 4x4 keypad in my my controller an arduino clone gizduino atmega644 but im having a problem because of its pin different pin description.
Features of avr microcontroller pin description of atmega16. The atmel atmega328p is a 32k 8bit microcontroller based on the avr architecture. We will offer direct atmega328 avr based projects list pdf file download link with info of its release date, number of projects. It is a reset pin, which is used to reset the microcontroller to its initial values. Idle, adc noise reduction, powersave, powerdown, standby, and extended standby atmega328p. This board includes digital io pins14, a power jack, analog ips6, ceramic resonatora16 mhz, a usb connection, an. Jan 30, 2018 atmega328 is an atmel microcontroller, which is used in arduino uno board. The evaluation kit comes with a fully integrated debugger that provides seamless integration with atmel studio. This empowers system designers to optimize the device for power. We will describe functions of each pin in below table. Arrow electronics carries a wide variety of products within these categories. T0 timer0 external counter input xck usart external clock io 2. Note that port c 54 use digital supply voltage, v cc.
Aref aref is the analog reference pin for the ad converter. Atmega328p microcontroller pinout, pin configuration, features. As of 20 the atmega328 is commonly used in many projects and autonomous systems where a simple, lowpowered, lowcost microcontroller is needed citation needed. Pin 19 on the ic is actually the pin for digital pin on the arduino. The highperformance microchip 8bit avr riscbased microcontroller combines 32kb isp flash memory with readwhilewrite capabilities, 1kb eeprom, 2kb sram, 23 general purpose io lines, 32 general purpose working registers, three flexible timercounters with compare modes, internal and external interrupts,serial programmable usart, a byte. Arduino nano arduino nano front arduino nano rear overview the arduino nano is a small, complete, and breadboardfriendly board based on the atmega328 arduino nano 3. Complete guide and explanation for atmega avr pinout. In my previous article, ive discussed about atmega32. The pin diagram of 8051 microcontroller looks as follows.
Atmega328p is an 8bit microcontroller based on avr risc architecture. Introduction to arduino uno uses avr atmega328 embedded. Part ecad model manufacturer description datasheet download buy part. Atmega16 is an 8bit high performance microcontroller from the atmels mega avr family. Arduino atmega328p architecture explained engineering. The revision 05 has a new package for the atmega328 datasheet, which enables all components to be on the top of the board. It has 14 digital inputoutput pins of which 6 can be used as pwm outputs, 6 analog inputs, a 16 mhz crystal oscillator, a usb connection, a power jack, an icsp header, and a. Atmega328pu microchip technology integrated circuits. Atmega32 microcontroller pin diagram, pin configuration. Apr 04, 2018 atmega328p is an 8bit microcontroller based on avr risc architecture. This member has many features similar to that of atmega32.
An introduction to features of atmega8 microcontroller with its pin diagram, internal architecture block diagram and atmega8 datasheet pdf for download. The atmega328 is a single chip microcontroller created by atmel in the megaavr family later microchip technology acquired atmel in 2016. It is an 8bit microcontroller that has 32k of flash memory, 1k of eeprom, and 2k of internal sram. Microchip technology atmega328 8bit avr microcontrollers mcus are highperformance riscbased devices that combine 32kb isp flash memory with readwhilewrite capabilities, 1kb eeprom, 2kb sram, 23 generalpurpose io lines, 32 generalpurpose working registers, serial programmable usart, and more. Atmega32 pin diagram click the image to enlarge it atmega32 pin configuration. High performance, low power atmelavr 8bit microcontroller family. Pin counts are different for different packages but with almost same characteristics.
Microcontrollers 8051 pin description tutorialspoint. This mcu has 32kb of flash, 2kb of sram and 1 kb of eeprom. The image below shows an avr atmega328 microcontroller chip. The atmega328pu is associated with the following product categories.
It should be externally connected to v cc, even if the adc is not used. The arduino uno is one kind of microcontroller board based on atmega328, and uno is an italian term which means one. It has 14 digital inputoutput pins of which 6 can be used as pwm outputs, 6 analog inputs, a 16 mhz quartz crystal, a usb connection, a power jack, an icsp header and a reset button. Atmega328p pin diagram explanation tutorial youtube. Basically is an opensource platform and is mainly based upon avr microcontroller atmega328. The kit provides access to the features of the atmega328p enabling easy integration of the device in a custom design. Its like the atmega168, with double the flash space. It has 14 digital inputoutput pins of which 6 can be used as pwm outputs, 6 analog inputs, a 16 mhz crystal oscillator, a usb connection, a power jack, an icsp header, and a reset button. Atmels atmega328 8bit processor in 28 pin dip package. Arduino uno is one of the famous microcontroller boards of the arduino family and is developed by. Perhaps the most common implementation of this chip is on the popular arduino development platform, namely the arduino uno and arduino nano models. Portxi 0 pin is floating portxi 1 connects a pullup to the pin keeps pin from floating if noone driving allows wiredor bus individual bits can be set cleared using bitops a bit can be toggled by writing 1 to pinxi sbi instruction e. The atmega328p xplained mini evalutation kit is a hardware platform for evaluating the atmega328p microcontroller. Atmega328pu datasheet, cross reference, circuit and application notes in pdf format.
The atmega328 is the microcontroller chip at the heart of the arduino uno. Microcontroller with 481632k bytes insystem programmable. The picopower atmega328p is a lowpower cmos 8bit microcontroller based on the avr. The onboard microcontroller includes a bootloader for enabling programming over uart. The high performance microchip 8bit avr riscbased microcontroller unites 32kb isp flash memory with readwhilewrite capabilities, 1kb eeprom, 2kb sram, 23. It has a modified harvard architecture 8bit risc processor core. Atmega16 is a 40 pin microcontroller based on enhanced risc reduced instruction set computing architecture with 1 powerful instructions. Atmega328p avr microcontroller with picopower technology. The arduino uno is a microcontroller board based on the. A properly configured shield can read the ioref pin voltage and select the appropriate power source or enable voltage translators on the outputs to work with the 5v or 3. The atmega328 is a very popular microcontroller chip produced by atmel. In this article, we will go over the pinout of the atmega328 chip.
Atmega328p pinout diagram, pin configuration, brief description. Many instructions are executed in a single clock cycle providing a throughput of almost 20 mips at 20mhz. Interrupt and wakeup on pin change special microcontroller features poweron reset and programmable brownout detection internal calibrated oscillator external and internal interrupt sources six sleep modes. The atmel atmega328p is a lowpower cmos 8bit microcontroller based on the avr enhanced. These pins are powered from the analog supply and serve as 10bit adc. It is a microcontroller board developed by and based on atmega328p atmega168 arduino boards are widely used in robotics, embedded systems, and electronic projects where automation is an essential part of the system. From these 6 analog inputs pins, we can do the process by using analog inputs. Introduction to atmega8 microcontroller architecture and. Atmel 8bit avr microcontrollers atmega328p datasheet complete pdf. Peripheral features two 8bit timercounters with separate prescaler and compare mode one 16bit timercounter with separate prescaler, compare mode, and capture mode. We will offer direct atmega328 avr based projects list pdf file download link with info of its release date. Jun 21, 2018 arduino uno is a microcontroller board developed by which is an opensource electronics platform mainly based on avr microcontroller atmega328. Atmega328p in 28pin narrow dual inline package dip28n.
The atmel 8bit avr risc based microcontroller combines 32 kb. It is one of the most economical boards of arduino family and is widely used because of its small number of inputoutput pins and. Atmega328p is a 28 pin chip as shown in pin diagram above. The highperformance, lowpower microchip 8bit avr riscbased microcontroller combines 32kb isp flash memory with readwhilewrite capabilities, 1kb eeprom, 2kb sram, 5469 general purpose io lines, 32 general purpose working registers, a jtag interface for boundaryscan and onchip debuggingprogramming, three flexible timercounters with. Introduction to atmega328 the engineering projects. Atmega328 avr based projects list pdf downloadable. Avr atmega8 microcontrollerfeatures and block diagram with. Atmega328 microcontrollers are from the 8bit avr microcontroller family. Atmega32 avr microcontroller8 bitintroduction to architecture. It has 14 digital io pins portd 8pins, portc 6 pins, portb 5pins, 6 analogue input pins, which can be sampled using onchip adc.
The atmega328 pu is associated with the following product categories. Arduino uno to atmega328 shrinking your arduino projects. Arduino uno pinout, examples, programming and applications. The further details about atmega 328 will be given later in this section.
Now, let me introduce another member of avr microcontroller family, the atmega8. It has more or less the same functionality of the arduino duemilanove, but in a different package. Atmega32 is built on cmos complementary metaloxidesemiconductor technology which has high speed, low power consumption and enhanced antistatic effects. Atmega328p is a high performance microcontroller chip. It has an eeprom memory of 1kb and its sram memory is of 2kb. Atmega328 avr based projects list basically includes projects that are explained thoroughly with the help of circuit. This pin on the arduino board provides the voltage reference with which the microcontroller operates. Atmega328 is an 8bit and 28 pins avr microcontroller, manufactured by microchip, follows risc architecure and has a flash type program memory of 32kb. Atmega328ppu atmel 8 bit 32k avr microcontroller protostack. Adc76 tqfp and qfnmlf package only in the tqfp and qfnmlf package, adc76 serve as analog inputs to the ad converter.
Atmega328 is an 8bit and 28 pins avr microcontroller. So, in simple words, atmega328 has 6 analogue pins. The atmega328 is a singlechip microcontroller created by atmel in the megaavr family it has. But it has reduced number of features and capabilities, yet it has enough features to work with. Atmega8 microcontroller pin description the main feature of atmega8 microcontroller is that all the pins of the microcontroller support two signals except 5pins. It has 8 pin for adc operations, which all combines to form porta pa0 pa7. Remember, there is already a 10k resistor attached to pin 1, you need to leave that in place. Cc is the supply voltage pin for the ad converter, pc3.
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