Note: This window is only available for devices that support the application in/out function used with the MPLAB ICD 3 or MPLAB REAL ICE in-circuit emulator. For details, see Hardware Tool Debug Feature Support by Device.
The Application In/Out function cannot be used with PIC32 instruction trace.
The Application In/Out window allows you to interact with a running application using the Application Input/Output (App I/O) feature supported on some devices. Using this feature, data may be sent serially to and from the target application and, during runtime, over the same PGC/PGD lines used for debugging. Data written to the APPOUT register will be displayed to the window, while user input will be sent to the target application and available in the APPIN register.