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

lajko,

in case you have a chance to still modify the PCB, I'd suggest to put some current-limiting resistors (say 220 Ohm) in series with the RA port pins. As far as I understand, the RA pins are used as inputs in your application, so the series resistors will not remarkably influence the level on the input pins, as these are high-Z.

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