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

If the chip isn't running reliably can you describe how it it wired up or a picture of your setup?

- Is it built with one of the Parallax protoboards with the chip already on it?

- If not is this on one of the Parallax development boards?

- Is this the DIP version installed on a solderless breadboard?

- Is this your own PCB?

You mentioned running at 50Mhz which makes board layout, etc critical.  The faster you run these chips you have to think less in the digital realm and more like an RF engineer since your getting into that range and traces become inductors and stray capacitance that is minor at low frequency can become an unknown part of your circuit.

Also, are any lines like the reset line left unconnected?

Robert

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