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USB hub

A universal serial bus and hub technology, applied in the direction of instrumentation, electrical digital data processing, etc., can solve the problem of not having host-to-host functions

Active Publication Date: 2019-03-26
PROLIFIC TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the downstream port of the USB hub only has the function of host to device, and does not have the function of host to host

Method used

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Embodiment Construction

[0031] The technical terms in this specification refer to the customary terms in this technical field. If some terms are explained or defined in this specification, the explanation or definition of this part of the terms shall prevail. Each embodiment of the present disclosure has one or more technical features respectively. On the premise of possible implementation, those skilled in the art may selectively implement some or all of the technical features in any embodiment, or selectively combine some or all of the technical features in these embodiments.

[0032] now please refer to figure 1 , showing a functional block diagram of a USB hub according to an embodiment of the present application. like figure 1 As shown, the USB hub 130 includes: an upstream port 131 , a plurality of downstream ports 132 , a hub function module 141 , a host-to-host function module 142 , a first control module 143 , a second control module 144 and interfaces 151 and 152 . The first host (such a...

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Abstract

A USB hub includes an upstream port; a first USB device control unit for performing packet format conversion; an FIFO circuit for storing data outputted from the first host; a second USB device control unit for performing packet format conversion; and a plurality of downstream ports. When any one of the downstream ports is coupled to the mobile device, if the first host commands the mobile deviceto switch to a host role from a device role, the mobile device temporarily disconnects from the USB hub, and the first host commands the USB hub to change an internal routing path. After the mobile device switches to the host role, the first host still performs the host role, and the first USB device control unit performs the device role; the mobile device performs the host role, and the second USB device control unit performs the device role. The first host is paired wiht the first USB device control unit. The mobile device is paired with the second USB device control unit.

Description

technical field [0001] The invention relates to a composite universal serial bus (USB) hub with host-to-host function. Background technique [0002] In the past, when the mobile device was connected to the host computer (notebook computer, desktop computer or car system (Car system)) through USB (Universal Serial Bus), the mobile device was regarded as a device (device) ( i.e. slave device). [0003] However, currently mobile devices (such as smart phones) are increasingly popular and have powerful hardware functions, so mobile devices may gradually replace the roles of notebook computers, desktop computers, or car systems. That is, the mobile device has changed from a device to a host. [0004] In addition, due to the huge number of USB applications, devices with USB host functions (such as mobile phones / desktop computers / notebooks, etc.) may need to be connected to a USB hub to connect to other peripheral USB devices. However, according to the original design of the USB...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/40G06F13/42
CPCG06F13/4081G06F13/4282G06F13/4295G06F13/4027G06F2213/0042
Inventor 游添为詹澄胜陈俊旭段人杰
Owner PROLIFIC TECH INC