In order to make the transfer rates faster and has more memory the Arduino Uno uses ATmega16U2. In addition to that, no drivers are needed for both Linux and Mac, not to mention that the information for Windows is surely needed and will be included in the Arduino IDE, besides all that, there’s a great ability which could also be considered as a benefit as well which is that the Uno can show up in different forms such as mouse, keyboard, or joystick, which is fascinating. Uno R3 processes SDA and SCL pins next to AREF, it includes an IOREF pin that allows shields to adapt to the voltage from the board, as well as another extra pin for spare use, therefore, it’s able to work with all shields provided that it has pins for.
You can download the open-source IDE (for Mac OS X, Windows, and Linux) for free.
An important note is that the Arduino 1.0 driver folder is required for the Arduino Uno R3 for proper installation.
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