I'm working on a simple front I/O board that connects to a PC motherboard. There is a standard connector in the "Intel Internal Connector And Cable Specification" that give a pin-out table of the internal motherboard connector. I have verified that my motherboard matches this.
The one thing I am confused about at the moment is the purpose and function of the "ID" pin included in the header.
Obviously, this forms part of some overcurrent protection circuit, but I have no idea what I'm supposed to do with it.
Am I just supposed to ground it? Leave it floating? Put some sort of current shunt on it? Have my own over current detection circuit and use this pin to signal over current events?