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

[quote="Jon Williams (Parallax)"]
The SX-Key requires 5 volts to operate. We once had a devce called the SX-Key ring that allowed the programmer to provide power to the SX-Key that was different from the target circuit (Which would allow you to program and debug 3.3v circuits). Perhaps with the resurgance of the SX we need to bring that back. 



[/quote]
Now that you mentioned it, I remember hearing about it. Exactly what was on the "ring"? 

 

Here is my workaround...   ...I can program and debug SX chips at 3.0 volts. Everything seems to work just fine. 

 

Now, that i have you all here. When I program the SX to be used with a external resonator (OSCXT2), I have a lot of trouble programming it again. The SX-Key reports that It can't talk to the SX chip. I can't reporgram for debug, or just plain program it. I'm thinking one of the osc pins ends up in a state that will not allow it to program correctly, or maybe MCLR issue...   ...any ideas? (I still have some testing to do on this issue)

 

-Dan

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