ATmega is a family in the AVR series of Atmel microcontrollers. It is the main microcontroller of the Arduino prototyping platform. Please specify the specific part number in your question.

The ATmegas are 8-bit RISC microcontrollers using a Harvard architecture. They have 4 to 256 kB program memory. Like all Atmel AVR microcontrollers, they are supported by various (open) toolchains. Most s are based on an chip.

They are the bigger brother of the microcontrollers, and have more memory and features.

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