| 摘要 |
Disclosed in the application are a hand held device, a USB charger, and a method for the hand held device to identify the USB charger. An identification information module is connected to a non-power pin inside the charging connector of the USB charger. The identification information module contains identification information marking the identity information of the USB charger. An identification information acquisition module is arranged between a non-power pin and a control circuit of a charging receptacle of the hand held device, for use in acquiring from the USB charger the identification information contained therein and providing same to the control circuit. The control circuit compares the identification information acquired and standard identification information. If the identification information falls within the range of the standard information, then the USB charger is identified by the hand held device and the USB charger is used for charging. Otherwise, the USB charger is not identified by the hand held device and the USB charger cannot be used for charging. The hand held device thus can use only a USB charger intended for charging the device, thereby ensuring safety when charging the hand held device. |
