Hi all...
I'm trying to cheap out and make one I/O pin do too much. Situation normal so far. Anyway... I'm contemplating how weak of a pull-down I can get away with and still get a reliable zero on the input pin. Is 220K to ground too weak?
"But why?" sez you... well, in some situations the line is also pulled up, so I'm thinking of a 47K pull up which with 220K should give a reliable one. 267K/5V is a few uA of continuous drain in the pulled-up situation -- if it gets much larger than that I need a better sleep solution.