Patent ID: 8065446

Claim:
A method of discerning a specification of a host interface with an interface identification apparatus, the method comprising: storing a plurality of predetermined data value sets associated with a plurality of potential host interface specification sets, respectively; sequentially connecting each of a plurality of pull resistors between a common pull voltage and the host interface, the plurality of pull resistors having a range of resistances that overlaps a range of interface resistances of potential host interfaces; measuring at least one loaded electrical characteristic of the host interface while each of the plurality of pull resistors is connected to the host interface; retrieving at least one stored predetermined data value set associated with at least one potential host interface specification set, respectively; comparing the at least one loaded electrical characteristic with at least one retrieved data value; identifying an associated specification of the host interface in accordance with at least one matching comparison to the at least one retrieved data value, respectively; and selecting a selectable device interface corresponding to the identified specification of the host interface.