SPRUJ71 august 2023
When plugged into a USB host, the XDS110 enumerates as both a debugger and a virtual COM port. U26 and U27 are reinforced digital isolators which isolate the SCI signals between the F28P650DK9 and the debug probe. The SCI UART signals are then passed from the debug probe on to the USB host. By default the F28P65x SCIA maps to the virtual COM port of the XDS110 using GPIO42 and GPIO43. Alternately, GPIO38 and GPIO55 can be used for SCIB. This is accomplished by manipulating the on-board switch S2. For the appropriate switch settings, see Section 3.3.2.