In SX Microcontrollers, SX/B Compiler and SX-Key Tool, timsmith54321 wrote:

Thanks so much for the help.  Everything is working now.  That SXKeySerialTester was the key.  I can now load and run the programs on the SX28.  The source of the problem was an incorrect wiring of my power supply.  I had it going through an extra voltage regulator, which was probably dropping the voltage below 5VDC.  When I took out the extra regulator, it started to work.  Well, I guess I should have simply tested the input voltages with a mmeter.

BTW, as a tip to other people trying to figure out if their SX-Key is working properly, a powered key will interface with a serial line terminal emulator.  I just confirmed this with my now working SX-Key.  (thanks to people here for that.)  Typing "SX-Key" in HyperTerminal will return SX-Key??? (with ??? being some odd characters).  Though, a better test seems to be this SXKeySerialTester since it clearly says, "found" or "not found."  Just makes things a bit more definite.  Oh, and putting a multi-meter on the input power leads might be helpfu.  :-)

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