# ATmega328P-PU **Wikidata**: [Q26205895](https://www.wikidata.org/wiki/Q26205895) **Source**: https://4ort.xyz/entity/atmega328p-pu ## Summary The **ATmega328P-PU** is a specific package variant of the ATmega328P, an 8-bit AVR RISC-based microcontroller manufactured by Atmel. Distinguished by its through-hole DIP-28 form factor, it is widely recognized as the core microcontroller used in the Arduino Uno board. It integrates 32 KB of flash memory, 2 KB of SRAM, and 1 KB of EEPROM, making it a standard component in embedded systems education and hobbyist electronics. ## Key Facts - **Classification**: Product model; subclass of the ATmega328P (which is a subclass of Atmel AVR and microcontroller). - **Manufacturer**: Atmel (Atmel Corporation). - **Package Type**: Through-hole DIP-28 (Dual In-line Package) form factor. - **Memory Specifications**: - **Flash Memory**: 32 KB (for program storage). - **SRAM**: 2 KB (static random-access memory for data handling). - **EEPROM**: 1 KB (electrically erasable programmable read-only memory for non-volatile data). - **Architecture**: 8-bit AVR RISC architecture. - **Primary Application**: Functions as the core microcontroller for the Arduino Uno development board. - **Suitability**: Designed for use with protoboards and prototyping due to its through-hole nature. - **Documentation**: Official datasheet available at `atmel.com/devices/atmega328p.aspx`. - **Image**: Available via Wikimedia Commons (`ATMEGA328P-PU.jpg`). ## FAQs ### What distinguishes the ATmega328P-PU from other ATmega328P variants? The ATmega328P-PU is defined by its through-hole DIP-28 package, which makes it suitable for protoboards and easy prototyping without specialized surface-mount soldering equipment. While the internal specifications match the standard ATmega328P, this physical form factor is distinct for through-hole applications. ### What are the memory capabilities of the ATmega328P-PU? Inheriting the specifications of the parent ATmega328P model, this variant includes 32 KB of flash memory for storing programs, 2 KB of SRAM for variable data manipulation, and 1 KB of EEPROM for retaining non-volatile data when power is removed. ### Why is the ATmega328P-PU significant in electronics education? It serves as the physical core of the Arduino Uno, the iconic development board that democratized access to microcontroller programming. Its low power consumption and accessible through-hole design allow students and hobbyists to learn electronics and create interactive projects without complex manufacturing tools. ### What family of microcontrollers does the ATmega328P-PU belong to? It is part of the Atmel AVR microcontroller family, utilizing an 8-bit AVR RISC-based architecture. ## Why It Matters The ATmega328P-PU represents a critical intersection of performance and accessibility in the world of embedded systems. By packaging the robust ATmega328P architecture into a through-hole DIP-28 form factor, this variant enabled the widespread adoption of the Arduino Uno platform. This specific chip revolutionized embedded systems education and hobbyist electronics by removing the need for specialized surface-mount soldering equipment, allowing users to prototype directly on breadboards and protoboards. Its impact extends beyond convenience; the chip's balance of 32 KB flash memory, low power consumption, and integrated memory subsystems provided enough capability for complex IoT devices and robotics while remaining cost-effective. Consequently, the ATmega328P-PU became an industry standard reference model for AVR education, empowering millions to learn electronics and develop interactive projects. ## Notable For - **Through-Hole Accessibility**: Utilizes a DIP-28 form factor that enables easy prototyping on breadboards and protoboards. - **Arduino Uno Integration**: Serves as the primary microcontroller for the Arduino Uno, the most iconic board in the Arduino ecosystem. - **Memory Architecture**: Combines 32 KB flash, 2 KB SRAM, and 1 KB EEPROM in a single package. - **Low Power Operation**: Designed specifically for energy-efficient embedded applications. - **Educational Standard**: Established as a foundational component for learning AVR microcontroller architecture. ## Body ### Overview and Classification The ATmega328P-PU is an 8-bit AVR RISC architecture microcontroller produced by Atmel Corporation. Structurally, it is a subclass of the ATmega328P product model. While it shares the same internal architecture and memory specifications as other variants in the ATmega328P line, the "-PU" suffix specifically denotes its physical implementation as a through-hole component. It belongs to the broader Atmel AVR microcontroller family, a lineage known for RISC-based processing. ### Technical Specifications The device integrates three distinct memory subsystems onto a single chip to handle different data storage needs: * **Flash Memory**: Provides 32 KB of space dedicated to program storage. * **SRAM**: Offers 2 KB of static random-access memory for runtime data processing. * **EEPROM**: Supplies 1 KB of electrically erasable programmable read-only memory for storing persistent data that must be retained when power is lost. ### Physical Implementation The ATmega328P-PU is defined by its "DIP-28" (Dual In-line Package) configuration. This through-hole form factor is a key differentiator from surface-mount variants, as it allows the chip to be inserted into sockets on protoboards or Arduino Uno boards. This physical characteristic is instrumental in its role in the hobbyist and educational markets, allowing for easy replacement and prototyping without specialized soldering gear. ### Ecosystem and Documentation As the heart of the Arduino Uno development board, the ATmega328P-PU plays a central role in the Arduino ecosystem. It facilitates rapid prototyping of interactive electronics and serves as a foundation for educational curricula worldwide. Official technical documentation and datasheets for the device are maintained by Atmel and can be found at `atmel.com/devices/atmega328p.aspx`. Visual references are available through the Wikimedia Commons file `ATMEGA328P-PU.jpg`.