I need to determine if my XBIB-U-DEV board or my MultiLink system has been damaged. Unfortunately, my test system was incorrectly powered this morning and I am left running forensics to figure out what orders need to be placed.
I am using Port C / BDM of the debugger to connect to P3 at the XBIB. Here is exactly how I had it wired:
- 20/DIO0 Before: 0.61V, After: ASSUMED 2.21V
- 14/VREF Before: 3.3V, After ASSUMED 12V
- 13/DIO9 (Output to LED)
Connected, powered via this connection (No VCC connection above)
- All 4 of 6 functioning pins on this; tied to a MultiLink.
- It smoked my radio chip under test.
- The MultiLink’s amber LED began flashing in an “erratic” fashion, simply unlike it usually does.
- I have powered the MultiLink up after inspecting it; the blue light comes on. I have not reconnected it to any hardware at this time. I know this is not PEMicro support, but if there is a test I can perform to determine if the unit was compromised, short of hooking it up to anything else, then that might be good.
- The XBIB powers up from USB, and I measure what I would expect at VCC. The RSSI stack at DS6 functions in time and sequence. The ADC/DIO 0-3 pins function with the onboard switches when sunk to ground with the pushbuttons and are not shorted to each other/ground.
Edit: The unit powers up and communicates/configures with XCTU. I have not yet tested any signals to the breakout header. The resistance between Vref and Vcc on the board, with no radio inserted into the module, is 0.5 ohms.