Patent ID: 7567113

Claim:
A method of connecting a first electronic device to a second electronic device, the second electronic device including a first circuit and a second circuit, comprising the steps of: connecting the first electronic device to the second electronic device using at least a conductor; providing, using the conductor, a clock signal from the first electronic device to the second electronic device to clock information out of the second circuit of the second electronic device during a first time period when second electronic device first powers up, wherein the second circuit is a memory circuit and wherein the first circuit is electrically decoupled from the conductor during the first time period thereby rendering the first circuit incapable of receiving the clock signal during the first time period; electrically coupling, using a switch, the first circuit of the second electronic device to the conductor during a second time period that is after the first time period; and providing, using the conductor during the second time period, an external voltage different from the clock signal from the first electronic device to the first circuit of the second electronic device to cause the first circuit to output a reference voltage, wherein the clock signal represents a periodic clock signal and the external voltage represents a non-periodic signal that is different from the clock signal.