Patent ID: 6781525
Filing Date: 2004-08-24
Classification: G06F,H04M

Abstract:
A shared interface device providing connection between a portable electronic device and a peripheral unit, the portable electronic device having a plurality of pins with one pin assigned with transmitting data/power supplying function (TÃ—D/POWER pin), the peripheral unit having a plurality of pins with one pin assigned with receiving data function (RÃ—D pin); the shared interface device comprisinga switch having at least two terminals, the switch having a first terminal connected to the TÃ—D/POWER pin of the portable electronic device and the RÃ—D pin of the peripheral unit, the switch being ON when the TÃ—D/POWER pin of the portable electronic device is HI and being OFF when the TÃ—D/POWER pin of the portable electronic device is LO; an energy-storing element with a first end connected to a second terminal of the switch to supply electrical power to the peripheral unit and a second end connected to ground, the energy-storing element being charged when the switch is ON and used as a backup power supply when the switch is OFF.