UART (Universal Asynchronous Receiver/Transmitter)-USB (Universal Serial Bus) multiplexing circuit and mobile terminal

A circuit and data terminal technology, applied in the direction of electrical digital data processing, instruments, etc., can solve problems such as abnormal operation of USB devices

Active Publication Date: 2018-02-09
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a UART and USB multiplexing circuit and a mobile terminal, which can avoid the problem of abnormal operation of the USB device during the process of switching the UART interface to the USB interface

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  • UART (Universal Asynchronous Receiver/Transmitter)-USB (Universal Serial Bus) multiplexing circuit and mobile terminal
  • UART (Universal Asynchronous Receiver/Transmitter)-USB (Universal Serial Bus) multiplexing circuit and mobile terminal
  • UART (Universal Asynchronous Receiver/Transmitter)-USB (Universal Serial Bus) multiplexing circuit and mobile terminal

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Embodiment Construction

[0016] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0017] The terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For exam...

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Abstract

The embodiment of the invention discloses a UART (Universal Asynchronous Receiver/Transmitter)-USB (Universal Serial Bus) multiplexing circuit and a mobile terminal. The UART-USB multiplexing circuitcomprises a USB-UART multiplexing interface, a power management integrated circuit, a changeover switch and a processing integrated circuit; a power output end is connected to a control end and a power line pin; a detection end is connected to a detection pin; a positive data line pin is connected to a first selection end; a negative data line pin is connected to a second selection end; a first positive data end is connected to a positive connection end of a UART; a first negative data end is connected to a negative connection end of the UART; a second positive data end is connected to the positive connection end of a USB; and a second negative data end is connected to the negative connection end of the USB. According to the embodiment, a USB device can be guaranteed to work normally in the process of switching an UART interface to a USB interface.

Description

technical field [0001] The invention relates to the technical field of terminals, in particular to a UART and USB multiplexing circuit and a mobile terminal. Background technique [0002] With the development of mobile terminals such as smart phones, the hardware circuit and software design of mobile terminals are becoming more and more complex. In order to effectively detect software bug information, the most effective way is to multiplex the Universal Serial Bus (USB) interface. Log (log) printing. [0003] In current mainstream hardware platforms, a Universal Asynchronous Receiver / Transmitter (UART) interface and a USB interface are multiplexed for log printing. When the UART and USB multiplexing interface is inserted into the USB device, it is necessary to switch the UART and USB multiplexing interface from the default UART interface to the USB interface. Due to the poor compatibility between the UART interface and the USB interface and the USB device during the switchi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/38G06F13/42
CPCG06F13/385G06F13/4286G06F2213/0042
Inventor 李路路
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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