- Added SDA and SCL pins that are close to AREF pin and two other new pins close to RESET pin, allowing voltage adaptation with IOREF. Our shields will be fully compatible both with the AVR boards operating @5V and Due @3.3V in future.
- Improved RESET circuit
- Replacing the Atmega 8U2 with Atmega 16U2 (datasheet)
The Mega is compatible with: