“The Kinetis Port pins are only 5V tolerant as inputs. The outputs are not 5V tolerant, and that includes pins configured as open-drain outputs. In output mode, if the pin is pulled above VDD, it will cause the output buffer to drive the output at VDD, which will pull-down the pin voltage to near VDD.”
I ran across this comment in a previous thread.
I want to configure a GPIO on the KL26Z we are using as a Hi-Z input (no internal pull up or down) that is externally pulled up to 5V through >20Kohm resistors and then to simulate button presses by turning that GPIO to a low output then back to a Hi-Z input. From the previous comment it seems that this is reasonable if the pins are 5V tolerant as inputs. I wanted to confirm this, or find where I am mistaken.
Also, I have scoured KL26 datasheets for the technical data that would support this if confirmed and can’t find any references. Is this documented somewhere?