A kind of usb mobile device realizes the method for non-electric storage

Abstract

The invention provides a method for realizing electroless storage of USB (universal serial bus) mobile equipment. The USB mobile equipment is provided with a USB insertion detection signal generating circuit, a storage module, a power storage module and a USB switching switch module. When the USB mobile equipment is inserted into a PC (personal computer), a USB insertion detection signal is generated by the USB insertion detection signal generating circuit and then fed back to the power storage module and the USB switching switch module, the power storage module is enabled to supply power to the storage module and the USB switching switch module, communication between the storage module and a local CPU (central processing unit) of the USB mobile equipment is switched to communication between the storage module and the PC by the USB switching switch module, and thereby electroless storage of the USB mobile equipment is realized. By the method for realizing electroless storage of the USB mobile equipment, the existing USB mobile equipment carrying with batteries can still normally communicate with the PC to store data under the conditions of no batteries or insufficient battery power supply and no external power supply equipment.

Description

technical field [0001] The invention relates to a method for realizing non-electric storage of a USB mobile device. Background technique [0002] At present, there are more and more handheld mobile devices on the market. They all have their own batteries. Generally, they can communicate with PC (computer) through the USB port to copy, store and backup data! However, when the PC communicates with the mobile device, it uses the insertion detection mechanism of the USB device to judge the pull-down status of the D+ or D- of the USB port to confirm whether there is a USB device connected, and the communication can only be carried out after the USB device is correctly identified. , This requires that when the mobile device communicates, the system must be turned on, the battery must have power or the PCUSB port power supply is sufficient to normally turn on the mobile device system. [0003] This technique has the following disadvantages: [0004] 1. When the battery of the (hi...

AI Technical Summary

Problems solved by technology

[0004] 1. When the battery of the (high current) mobile device is completely dead or the battery is damaged, it communicates with the PC through the USB port. Since the output current of the USB port of the PC is limited to 500MA or 900MA, it generally cannot meet the requirements of the (high current) mobile device. If the power consumption of the whole machine is low, the (high current) mobile device cannot be recognized normally, and communication cannot be performed. For example, the wireless mobile hard disk, PAD, etc. on the market, when the battery is removed and the external power supply is not connected, the PC will be plugged in. The device cannot be recognized normally

[0005] 2. If the user just wants to copy data and other operations in the off state, after connecting to the PC through the USB port, the system needs to be fully turned on (one is to turn on after plugging into the PC by default, and the other needs to be turned on manually to store). Sometimes, if some mobile device systems are more complicated, such as mobile devices with Android system, it takes a long time to start up, and it takes a long time for the PC to recognize the mobile device! After the copy is over, you have to manually shut down and other operations, adding unnecessary trouble

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