In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Chris Savage wrote:

Dan,

   I just finished following the exact steps you took and I can confirm that the same issue occurs on my PDB.  There is one exception though which may explain the problem.  The first few times I tried to DEBUG on the breadboard using the SX-Key by itself the buttons were still grayed out.  I had to put smaller thicker wires onto the breadboard to get it to work with the Key alone.  And although it did not work once I added the KeyRing the fact that it does on the PDB PCB leads me to believe that this is an issue with capacitance and/or inductance.  Capacitance issues are common when breadboarding and can affect a lot of things.  When you DEBUG the SX-Key must generate the clock signal for the SX Chip.  I am surmising the added capacitance is causing the problem, however I will discuss this with an Engineer this morning and get his input and perhaps have him follow up or I will myself.  Take care.

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