Arduino UNO ready AVR ATmega328P microcontroller

This is the ATmega328P chip pre-programmed with the Official Arduino UNO bootloader (optiboot).

This chip + bootloader is supported by the official Arduino 0020 release and up

The new optiboot bootloader occupies only 512 bytes and uploades sketches faster (115200 baud).

Capacity:

• 32256 bytes available for sketches (previously 30720 bytes)
• 2K RAM
• 1K EEPROM

You need to select "Arduino UNO" board in the Arduino IDE tools menu (Arduino 0020 and up).

You can also use this chip in the Duemilanove and Freeduino boards and gain more flash capacity and sketch upload speed. Just select Arduino UNO board in the Arduino IDE tools menu when using these boards with this replacement micro controller