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

I do have a bypass cap on the regulator, simulating the Tech Board.  I do not, however, have one directly on the SX supply pins.

Regarding the use of the internal 4MHz oscillator, it works perfectly for my application.  I understand the concern for prolonged uses, but my transmission / receive is so short and very far between that it causes no problems.  Like I mentioned earlier, it works perfectly every time on the Tech Board.

The lack of debugging functionality really doesn't concern me, but the fact that something is not functioning on the PCB exactly like the Tech Board, does.  I know my programming header is pathetic, but I figured (and I could be wrong) that since connection is made and programming is successful, it must be written correctly.  Could it be possible that even though the SX-Key and Editor can find and connect to the chip, the program might not copy properly?  I don't suppose there is any built-in "checksum" function that takes place to ensure the program is intact after writing.

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