METHOD AND DEVICE FOR IDENTIFYING UNIVERSAL SERIAL BUS (USB) INSERTION OR CHARGER INSERTION OF MOBILE TERMINAL

A method and a device for identifying the universal serial bus (USB) insertion or charger insertion of the mobile terminal are disclosed. The device comprises a USB interface module (110) which is connected with an external power supply device, an interface detection and control module (120), an electronic switch module (130), a charge switching module (140), an identification module (150) and a baseband USB data transceiver module (160).The device enables the mobile terminal to enter a USB mode when an insertion of the external power supply device is detected. The device can accurately determine the insertion of USB or charger by flexibly generating an interrupt response based on finally detected D- signal state. The device can quickly and accurately identify the type of the USB or charger inserted into the mobile terminal.