Patent ID: 7797557
Filing Date: 2010-09-14
Classification: G06F,Y02D

Abstract:
1. A detector for detecting a wire connection with a root hub, the detector comprising: a plug for connecting the detector to the root hub through a cable; a battery power supply which outputs a predetermined constant electrical potential; and a Micro Control Unit which receives a specific electrical potential from the root hub through the plug and cable, and receives the constant electrical potential from the battery power supply, wherein the Micro Control Unit comprises: a CPU and peripheral circuit which receives the constant electrical potential from the battery power supply, wherein the CPU and peripheral circuit is operated by electrical potential supplied from the battery power supply; a USB function circuit which receives the specific electrical potential from the root hub, wherein the USB function circuit is on-off controlled by the CPU and peripheral circuit, wherein the USB function circuit is operated by only electrical potential supplied from the root hub; a detection circuit which detects a voltage level of the specific electrical potential from the root hub and outputs an electrical potential to the CPU and peripheral circuit based on the detected voltage level; and a ring oscillator which receives the specific electrical potential from the root hub and the constant electrical potential from the battery power supply, and outputs an electrical potential to the CPU and peripheral circuit based on the received electrical potentials.