I need to use open drain mode with disabled internal pullup and pulldown resistors: I want to connect 12v relay module directly to the board (it has 10mA control, but 12v; open drine mode with disabled pull resistors lets control higher voltages)
What is pins states - pullup, pulldown and opendrain for
- Disabled device?
- Enabled device, but pins still not inialized? (Has default settings?)
- After device (only) power lost?
I would not want 12V in these cases to burn my board.
- Maybe someone know what is max current and voltage can be used in tis mode?
Any advice or references to documentation will be helpful. I read datasheet and reference manual several times but didn’t found the answer
I use wiznet wizwiki w7500 board.