Patent ID: 7245154

Claim:
A circuit, comprising: a differential input receiver having a first input terminal and a second input terminal; a first programmable switch coupled to the first input terminal and coupled through a first resistor to a first voltage such that if the first programmable switch is closed, the first input terminal is pulled towards the first voltage; a second programmable switch coupled to the second input terminal and coupled through a second resistor to a second voltage such that if the second programmable switch is closed, the second input terminal is pulled towards the second voltage; a third programmable switch coupled to the first input terminal and coupled through a third resistor to the second voltage such that if the third programmable switch is closed, the first input terminal is pulled to the second voltage; and a fourth programmable switch coupled to the second input terminal and coupled through a fourth resistor to the first voltage such that if the fourth switch is closed, the second input terminal is pulled towards the first voltage; wherein the first and second programmable switches are programmed to be closed and the third and fourth programmable switches are programmed to be open during a first differential input mode of operation in which the differential input receiver processes differential input signals provided to the first and second input terminals.