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

I am having some serious problems when trying to drive my SX28AC/DP's without the SX-Key.

I have tried several 50 Mhz resonators ,with OSCHS2 and OSCHS3,

and also a 4 Mhz resonator with OSCHS2 and OSCXT2,

as well as  the 75MHz TTL oscillator with OSCHS3.

Every time the chip stalls. However, when I use the SX-Key to generate the clock signal, everything works fine. Also, if I connect a resonator, and the SX-Key afterwards, without having it generate a clock signal, everything works fine. I am having this problem with all my SX28 chips.

Does anyone know where the problem may come from?

Thanks in advance for any help.

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