The Atmel-ICE supports a limited Data Gateway Interface (DGI) when debugging and programming is not in use. Functionality is identical to that found on Atmel Xplained Pro kits powered by the Atmel EDBG device.
The Data Gateway Interface is an interface for streaming data from the target device to a computer. This is meant as an aid in application debugging as well as for demonstration of features in the application running on the target device.
DGI consists of multiple channels for data streaming. The Atmel-ICE supports the following modes:
| AVR port | SAM port | DGI USART pin | Description |
| 3 | 6 | TX | Transmit pin from Atmel-ICE to the target device |
| 4 | 1 | VTG | Target voltage (reference voltage) |
| 8 | 7 | RX | Receive pin from the target device to Atmel-ICE |
| 9 | 8 | CLK | USART clock |
| 2, 10 | 3, 5, 9 | GND | Ground |
| AVR port | SAM port | DGI SPI pin | Description |
| 1 | 4 | SCK | SPI clock |
| 3 | 6 | MISO | Master In Slave Out |
| 4 | 1 | VTG | Target voltage (reference voltage) |
| 5 | 2 | nCS | Chip select active low |
| 9 | 8 | MOSI | Master Out Slave In |
| 2, 10 | 3, 5, 9 | GND | Ground |