I am using USB2517 - USB 2.0 Hi-Speed 7-Port Hub Controller IC to make a USB 2.0 hub.
What I do not understand (or its missing from the IC's datasheet), is Pins OCS[7:1]_N, which are "Input from external current monitor indicating an over-current condition".
I do not understand if that pin is Active Low or active high. Do I need to send a 0V signal to indicate there is no overcurrent, or a 3.3V signal to indicate there is no overcurrent?
As a note, the datasheet says this pin has a internal pull up resistor, but this does not help me understand what level signal I need to send to activate the overcurrent condition.
I guess since there is a internal pull-up, then 0V are used to indicate overcurrent?
This information from the datasheet is either missing or its plain obvious.
Otherwise, I will have to contact microchip to ask for support.