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TM4C1294NCPDT: XDS110: changed configuration to drag-n-drop (config option 4) and now can not revert back to default configuration.

Part Number: TM4C1294NCPDT
Other Parts Discussed in Thread: ENERGYTRACE

Doing some testing I changed the configuration of an on-board XDS110 to option 4:

4 -- CMSIS-DAP 2.0 configuration: Features include XDS Debug, App COM Port,
     Aux COM Port, CMSIS-DAP 2.0, EnergyTrace support, and Drag-n-Drop Flash
     (Drag-n-Drop Flash is only enabled on embedded XDS110 probes.)

However, I can not revert back to default configuration or get the device into DFU mode.

I have tried grounding pin 97 while unplugging and then plugging back in the USB cable but that does not seem to have any effect.

Any solution for reverting an XDS110 back to default configuration after being put into drag-n-drop mode?

Thanks,

Mark