I'm currently working on a design with the 52258. I am trying to protect the GPIO lines in the event of an unpowered processor. (This is not a normal operating condition, but is a failure mode that must be protected against. Specifically, I am protecting against a double problem... processor unpowered, with user error in installing a cabling harness such that 48V is applied to a pin's input path)
The max current for a single pin, according to the data sheet, is 25 mA. However, this is for a powered chip. Does anybody have advice on what the max current should be for a pin on an unpowered chip?
I can try to rephrase the question, if necessary.