Device that provides power to a host via a Mini-B interface upon detection of a predetermined voltage

摘要

When a host 101 is connected to a device 102 via a USB cable 103, the ID terminal on the device 102 is short-circuited to the GND line, hence to reduce the voltage level of the ID terminal. Since power feeding means 109 starts feeding power to the V_BUS terminal when detecting that the voltage level of the ID terminal turns from “H” to “L”, the power is supplied to the host 101 through the V_BUS line of the USB cable 103.