Analog signal manipulations and measuring.The following are the key application areas for the controller: Operating temperature of -40 oC to +105 0C.Programmable Watchdog timer with a separate On-chip oscillator.This means that it isn’t suitable for things like speech recognition, deep learning, or other common microcontroller tasks.According to its datasheet, some of the main specs of the controller are: The 20Hz CPU found on the ATmega328P chip is great for running simple code, but it offers limited processing power for complex applications. Text, images, and other pre-made assets can be stored in flash memory as a way to free up additional memory for the programs you are running, improving your SRAM budget. Programmers working with Arduino boards have a lot of control over memory management thanks to the use of C++. For those who want to use multiple libraries and code with a lot of variables, though, it can be easy to run out of SRAM, causing your program to fail. The ATmega328P chip comes with 2kB of SRAM, and this is plenty for most projects. These limitations also apply to the Arduino boards that use these chips. Unlike SRAM, EEPROM is non-volatile and will retain its data when the ATmega328P chip isn’t powered.Īs with any microcontroller chip, the ATmega328P comes with certain limitations that have to be considered before you decide to work with it. EEPROM: This is a type of byte erasable memory used to store small amounts of data.This memory plays the same role as the RAM in your PC, providing the ATmega328P chip with temporary memory to store data and variables as it runs through code.

SRAM: SRAM stands for 'static random access memory'.You can learn about the differences between volatile and non-volatile memory on the MUO website. The ATmega328P is equipped with just 32kB of flash memory, though this is enough for plenty of code. Flash Memory: Flash is a type of non-volatile memory that is used for permanent storage.By contrast, your PC's Intel or AMD CPU is likely a CISC (complex instruction set computer) processor. RISC stands for 'reduced instruction set computer' and is a type of processor designed to simplify the individual tasks a computer performs. CPU: The CPU on the ATmega328P chip is an 8-bit AVR RISC-based CPU.Pin Count: 28 or 32 (depending on the package type)Įach of these different specifications plays its own role in making the ATmega328P so well-suited to use with development boards like an Arduino.CPU: 8-bit AVR with a maximum speed of 20MHz.Let’s start with the basic specs to give you an idea of how the ATmega328P shapes up. We’ve broken these down to make it easier to understand the limitations and restrictions of this chip. There are a number of specifications to be aware of before you start writing code for your microcontroller. The ATmega328P has a surprisingly dense datasheet for such a small chip.

Arduino uno atmega328p datasheet