2.2.3 Data Gateway Interface (DGI)
The MPLAB Data Visualizer can communicate with a target board’s embedded debugger via the Data Gateway Interface (DGI). When the board is connected to the computer with the USB cable, the visualizer will show that DGI is available for the target and a list of available interfaces (SPI, UART, etc.) will appear below.
In the figure below, the SPI interface is enabled. The MCU can now communicate with the visualizer on its SPI port.