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

I think I solved the problem now! I had an external 14pin DIL oscillator connected to the SX directly and then I looked on the frequency signal with a scope it looked alittle strange. Like a sinus wave and with an amplitude of around 12Volt, even that I only have 5V connected, so I put a inverter from a 74HC04 IC between the oscillator and the SX to "clean up" the signal and after that it works!

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