I'm using the XC167 Controller and i want to send signals via the IO Port3 (i.e. P3.0) to addintional hardware. the output level of the controller is 4-4.55V in high level. But my hardware allows only 2.0V - 3.5V. How can i do so? I've read in the Datasheet that it is possible to switch the output driver to an open drain configuration and use a external pullup resistor. Does anyone has experience in that? Cause i don't want to destroy some hardware only because of too high voltage. Regards Marco