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    ATMEGA328P-PU device package

    ATMEGA328P-PU device package

    ATMEGA328P-PU schematic symbol

    ATMEGA328P-PU schematic symbol

    Microcontrollers are perhaps the most versatile and widely used ICs in electronic circuits. A microcontroller is a programmable integrated circuit (IC) which can be considered as a miniature computer system. A microcontroller IC typically combines processor core, RAM, ROM, and input/output peripherals into a single IC package. Due to their versatility and functionality, microcontrollers can virtually be found in almost all digital electronic circuits and embedded systems. From home appliances, office machines, entertainment systems, modems, and vending machines to satellite systems, industrial robots, military hardware, automotives and aircrafts, microcontrollers are found everywhere. The greatest feature of microcontrollers is their ability to be programmed which allows the engineers to customize their functionality according to their requirements. Today thousands of different microcontrollers with varying bit sizes, package sizes, clock speeds, RAMs, ROMs, I/Os and other technical specifications are available in the market to choose from. The latest technology paradigms of Industry 4.0 and Internet of Things have increased the utility and importance of microcontrollers manifold.   

    What is ATMEGA328P-PU?

    The ATMEGA328P-PU is an AVR 8-bit high-performance low-power microcontroller from ATMEL Corporation. The ATMEGA328P-PU is a RISC (Reduced Instruction Set Computer) architecture microcontroller with 32kB of flash memory. The microcontroller IC also houses 1kB of EEPROM, 2kB of SRAM and 23 GPIO lines. The device also features three flexible timers/counter, serial USART, SPI port, 10-bit ADC and five programmable power saving modes. The operating voltage range is 2.7V to 5.5V. The P in the suffix signifies that the microcontroller comes in a DIP package and the U signifies that the device has an “industrial” temperature range.

    Pin Configuration                            

    The pin description of the ATMEGA328P microcontroller is given in the following table:

    Pin name Pin description
    Vcc Digital supply voltage
    GND Ground
    PB7:0 Port B pins. Bi-directional I/O port with internal pull up resistors.
    PC5:0 Port C pins. Bi-directional I/O port with internal pull up resistors.
    PD7:0 Port D pins. Bi-directional I/O port with internal pull up resistors.
    AVcc Supply voltage for ADC.
    Aref Analog reference pin for ADC.


    • 8-bit microcontroller
    • RISC architecture
    • Powerful instruction set
    • Single clock cycle execution
    • Fully static operation
    • 16 MIPS throughput at 16MHz
    • On-chip 2 cycle multiplier
    • 1kB EEPROM
    • 2kB built-in SRAM
    • Optional boot code section
    • Firmware lock security feature
    • Real time counter with separate oscillator
    • Six PWM channels
    • 8-channel 10-bit ADC
    • Programmable serial USART
    • SPI interface
    • On-chip analog comparator
    • Internal calibrated oscillator
    • Six sleep modes


    Since microcontrollers are general-purpose programmable ICs, so there are literally hundreds of applications in which they are used. Some of the popular applications of microcontrollers are listed down below:

    • Camera systems
    • Security alarms
    • Washing machines
    • Temperature control systems
    • Building automation systems
    • Motor control circuits
    • Instrumentation devices
    • Industrial control systems
    • Robot systems
    • IC testing equipment
    • GPS tracking applications
    • GSM based automation systems
    • RFID based identification systems
    • Kitchen appliances


    The salient technical specifications of the ATMEGA328P-PU are listed as following:

    • Architecture: 8-bit RISC
    • Instruction set length; 131
    • General purpose registers: 32 x 8-bit
    • Flash memory: 32kB
    • EEPROM: 1kB
    • SRAM: 2kB
    • Timer/counter: 2 x 8-bit
    • ADC: 8-channel 10-bit
    • GPIOs: 23
    • Package: 32 lead DIP
    • Throughput: 1 MIPS per MHz
    • Low power modes: 6
    • Max oscillator frequency: 16MHz


    CY7C64013-PC, CY7C64013C-PXC;  

    How ATMEGA328P-PU work?

    There is a plethora of applications and circuits in which microcontrollers are used. One of the most common applications of the microcontrollers is the control of DC motors. H-bridges or motor driver ICs are used in conjunction with microcontroller to control the DC motors because microcontrollers cannot provide sufficient power for the motors to run. The ATMEGA328P microcontroller also features PWM channels therefore the PWM based control of motors is also possible.

    Following is a DC motor control application circuit based on ATMEGA328P microcontroller.

    ATMEGA328P-PU application circuit

    ATMEGA328P-PU application circuit

    ATMEGA328P-PU Related Products Prices

    PartsMfr.DescriptionStockPricesBuy Now


    Microchip TechnologyIC MCU 8BIT 32KB FLASH 28DIP3000$1.404 Lowest
    ATMEGA328P-AURAtmelIn-System Programmable Flash5000$1.255 Lowest
    ATMEGA328P-MUMicrochip TechnologyIC MCU 8BIT 32KB FLASH 32VQFN1991$1.395 Lowest
    ATMEGA328P-ANRAtmelMCU 8-bit AVR RISC 32KB Flash3000$2.175 Lowest
    ATMEGA328P-MMHRMicrochip TechnologyIC MCU 8BIT 32KB FLASH 28VQFN5136$1.893 Lowest


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