OTG equipment supplying power to communication object during USB communication and power supply method

Abstract

The invention discloses OTG (On-The-Go) equipment supplying power to a communication object during USB communication and a power supply method. The OTG equipment comprises a CPU chip and a master / slave mode switching circuit, wherein the master / slave mode switching circuit comprises a charge interface used for being connected with an external power source, a communication USB interface used for being connected with an external USB data line, a power controlling-switching module and an ID controller; a power pin of the charge interface is connected with a power pin of the communication USB interface through the power controlling-switching module, and the power controlling-switching module is used for controlling connection / disconnection of the circuit; and the CPU chip is connected with anID pin of the communication USB interface through the ID controller, and the ID controller is used for switching a master mode and a slave mode of the OTG equipment. Through the OTG equipment, while compatibility judgment of the master working mode and the slave working mode is realized, dynamic operation of smartphone charging, peripheral equipment charging and simultaneous charging of a smartphone and peripheral equipment is realized, and data transmission stability is improved.

Description

technical field [0001] The invention relates to an OTG device, in particular to a peripheral interface circuit used for USB communication and power supply of a mobile phone, and provides a method for power supply while communicating. Background technique [0002] OTG is the abbreviation of On-The-Go. It is a technology developed in recent years. It was announced by USBImplementers Forum on December 18, 2001. It is mainly used in the connection between various devices or mobile devices for data exchange. Especially Pads, mobile phones, consumer devices. Change the inconvenience of data exchange between multiple connectors of different standards among devices such as digital cameras, video cameras, printers, and memory cards of up to 7 standards. It became popular in the market around 2014. [0003] In the prior art, a device with OTG function generally detects the state of the device's USB_id pin to determine whether the device is in master mode (USB_id is grounded) or slav...

AI Technical Summary

Problems solved by technology

Therefore, in some specific application scenarios, such as when a smartphone is connected to an external device through a USB interface to transmit specific data, the USB interface is occupied, causing the smartphone to be unable to charge in this case

When the battery of the smartphone is low, there is a risk of power failure of the smartphone, discontinuous information transmission, low transmission efficiency, and loss of some work content.

When the transmitted data is very important, or the transmitted data needs to be processed, there are strict requirements on the transmission stability. This deficiency may lead to the loss of important data, which will be a fatal flaw.

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