I've checked the connection from the chip to the CC debugger multiple times and I think I'm following the schematic(s) correctly, as well as measuring the voltages correctly. I am not sure why I am getting this -3.3 V output.
The thing is I've tried multiple different things described in the datasheet, but for some reason I just can't get the CC debugger to recognize the Panasonic/CC chip (the red, static light is still showing). It shows up in SmartRF studio with the firmware up to date but doesn't recognize the CC chip.
I know that the 3.3 V debugger supply is optional but I'm trying to find out if the debugger itself is broken, and if the -3.3 V is an indication of that.