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USB (Universal Serial Bus) interface circuit, and implementation method and device for USB interface

A USB interface and circuit technology, applied in the field of communication, can solve the problem that the USB A port cannot support the connection at the same time.

Inactive Publication Date: 2018-05-25
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a USB interface circuit, a method and a device for realizing the USB interface, so as to solve the problem that the existing USB A-type port cannot support the connection with the USB device and the USB host at the same time

Method used

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  • USB (Universal Serial Bus) interface circuit, and implementation method and device for USB interface
  • USB (Universal Serial Bus) interface circuit, and implementation method and device for USB interface
  • USB (Universal Serial Bus) interface circuit, and implementation method and device for USB interface

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Embodiment Construction

[0044] Due to the problem that the existing USB A-type port cannot support the connection with the USB device and the USB host at the same time, the present invention provides a USB interface circuit and a method for sharing the USB interface between the USB device and the USB host. According to the difference in VBUS voltage between the USB device and the USB host, it is recognized whether the USB interface is connected to the USB host or the USB device, and the signal line D+ and / or D- is processed according to whether the USB interface is connected to the USB host or the USB device, so that The USB interface circuit is matched with the USB device or the USB host connected to the USB A type port, so that the same USB interface can support the connection with the USB device and the USB host at the same time, thereby effectively solving the problem that the existing USB A type port cannot simultaneously support and connect with the USB host. There is a problem with the connecti...

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PUM

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Abstract

The invention discloses a USB (Universal Serial Bus) interface circuit, and an implementation method and device for a USB interface. By use of the difference of external USB equipment and a USB hos onan aspect of VBUS voltage, whether the USB host or the USB equipment is connected with the USB interface or not; according to a result that the USB host or the USB equipment is connected, a signal wire D+ and / or D- is processed to enable the USB interface circuit and the USB equipment or the USB host connected with a USB A type port to be matched; therefore, the same USB interface can simultaneously support the connection of the USB equipment and the USB host; and the problem that an existing USB A type port can not simultaneously support the connection of the USB equipment and the USB hostis effectively solved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a USB interface circuit, a method and a device for realizing the USB interface. Background technique [0002] The use of USB interface on computers and communication terminal products has a long history. Among them, on computers and customer premise equipment (Customer Premise Equipment, CPE), the USB type A USB interface (ie, USB A type port) is very common, and it can realize power supply and communication for the equipment through one interface. In these applications, the USB interface is used as the host, and there are many types of connected devices, including printers, mobile hard disks, card readers, etc. [0003] Many CPE products are equipped with a USB type A interface, which is a USB host interface for connecting devices such as U disks and printers. However, CPE products often have another requirement, that is, a USB device interface is required to connect to ...

Claims

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Application Information

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IPC IPC(8): G06F13/40G06F13/42
CPCG06F13/40G06F13/42G06F13/4063G06F13/4282
Inventor 韩正渭
Owner ZTE CORP
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