Universal serial bus (USB) connection detecting circuit system and its operation method

A universal serial bus, circuit system technology, applied in hardware redundancy for data error detection, electrical digital data processing, response error generation, etc., can solve problems such as inability to connect directly

Inactive Publication Date: 2003-05-14
PROLIFIC TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this existing connection detection circuit system is that this circuit system is designed according to the standard USB specification, that is, the devices located at both ends of the connection detection circuit system must maintain a master-slave relationship to conform to the star shape of the USB bus. Hierarchy
Therefore, under this circuit system, a USB functional device can only be connected to a USB hub device or a USB host device, but cannot be directly connected to another USB functional device

Method used

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  • Universal serial bus (USB) connection detecting circuit system and its operation method
  • Universal serial bus (USB) connection detecting circuit system and its operation method
  • Universal serial bus (USB) connection detecting circuit system and its operation method

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Embodiment Construction

[0068] Hereinafter, several methods and their embodiments proposed by the present invention to achieve the aforementioned objectives will be described in detail.

[0069] "Manual Switch Mode"

[0070] see image 3 , the figure shows a connection detection circuit system of the first embodiment of the present invention. The connection detection circuit system 500 has a set of differential signal lines 503, 504, a set of potential resistors 508, 509, a set of grounding resistors 506, 507, a power supply system 510, and a manual switch assembly set 511. Wherein, the differential signal line 503 is used for connecting to the D+ differential signal line 403 of the USB transmission line 40 , and the differential signal line 504 is used for connecting to the D− differential signal line 404 of the USB transmission line 40 . The connection detection circuit system of this embodiment is a manual switch mode (Manual Switch Mode) circuit system.

[0071] When a USB device host (deviceh...

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Abstract

In the present invention, the universal serial bus connection detecting circuit system includes one transmission circuit and one detection circuit, and the detection circuit includes one set of differential signals wires, one set of earthed resistor assembly and one set of potential resistor, assembly, with each earthed resistor assembly and each potential resistor assembly being connected to thesame differential signal wire via one switch assembly. The transmission circuit is used to receive one current relative signal from power source to the differential signal wire and each current relative signal is earthed via the earthed resistor. The detection circuit is used to detect the change in current flowing through each differential signal wire.

Description

technical field [0001] The invention relates to a circuit system and its operation method, in particular to a connection detection circuit system used in a Universal Serial Bus (USB) system and its operation method. Background technique [0002] Universal Serial Bus (USB) is a new bus interface proposed by several major computer manufacturers to solve the complex problems faced by existing computer systems and interface devices in installation and expansion. Under this system, all peripheral devices can communicate with the host computer through the same interface, that is, a USB bus. When installing this type of device, it is not necessary to shut down the host computer in advance, nor to install the driver program separately. [0003] According to the USB specification, each USB system is mainly composed of three components, namely, a USB host (Host), a USB connection line (Inter-connection) and a USB device (Device). In each USB system, there is only one USB host, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/20G06F13/38
Inventor 吴文珍
Owner PROLIFIC TECH INC
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