Patent ID: 6351691
Filing Date: 2002-02-26
Classification: G08C

Abstract:
An integrated I/O signaling circuit capable of operating in one of a plurality of modes for bi-directionally exchanging information over a single path with a remote secondary processing device, said I/O signaling circuit comprising:a power supply having a ground and a high potential output; a high potential terminal that receives said high potential from said power supply; a low potential terminal; a first variable impedance device connected between said high potential terminal and said low potential terminal; a second variable impedance device connected between said low potential terminal and ground; a first circuit for controlling the impedance of said first variable impedance device; a second circuit for controlling the impedance of said second variable impedance device; and wherein said first circuit and said second circuit and said first variable impedance device and said second variable impedance device configure said I/O signaling circuit to operate in one of said plurality of modes for exchanging signals with said remote secondary processing device over said single path.