Data transmission control method and controller for USB (universal serial bus) low-speed device

A device data and transmission control technology, applied in the field of mobile communication, can solve the problem of wasting design resources and achieve the effect of area reduction

Inactive Publication Date: 2014-05-21
SANECHIPS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The present invention provides a USB low-speed device data transmission control method and controller to solve the problem of wasting a lot of design resources for USB LS devices caused by the completion of USB LS control and full-speed and high-speed control together in the prior art question

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  • Data transmission control method and controller for USB (universal serial bus) low-speed device
  • Data transmission control method and controller for USB (universal serial bus) low-speed device
  • Data transmission control method and controller for USB (universal serial bus) low-speed device

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Embodiment Construction

[0046] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art.

[0047] In order to solve the problem that the USB LS device wastes a lot of design resources because the control of the USB LS is completed together with the full-speed and high-speed control in the prior art, the present invention provides a USB low-speed device data transmission control method and The controller, in the embodiment of the present invention, is improved on the original basis based on the structure and princi...

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Abstract

The invention discloses a data transmission control method and a controller for a USB (universal serial bus) low-speed device. The method comprises the following steps of detecting a D+ signal line and a D- signal line of the USB low-speed device at the beginning of transmission, and pulling up the D+ signal line if the D+ signal line and the D- signal line are in an idle state; after the D+ signal line is pulled down on a host side, causing the host side to directly enter a reset state, and pulling up the D+ signal line; after the host side is reset, controlling a data transmission channel EP to perform data transmission with the host side, and setting the D+ signal line and the D- signal line to be in the idle state after the transmission is finished. According to the technical scheme, a conventional USB device compatible with USB low speed only supports a USB low-speed device function, the area of the controller is reduced by 50 percent, and interface communication transmission between physical layers and channel detection handshaking during the transmission are accurately realized according to USB protocol requirements.

Description

technical field [0001] The present invention relates to the field of mobile communications, in particular to a method and a controller for controlling data transmission of low-speed devices on a universal serial bus (Intel Universal Serial Bus, referred to as USB). Background technique [0002] USB is a well-known data transmission interface. Since the birth of the first draft in November 1994, the USB interface has become almost all Standard equipment for electronic equipment that needs data transmission; application fields include fast synchronous instant transmission of personal computers, consumer and mobile products; the most widely used USB interface is USB2.0 and USB3.0. .0 is backward compatible with USB2.0, and the performance comparison between the two is shown in Table 1: [0003] Table 1 [0004] [0005] In the prior art, the device class of USB will show some basic characteristics of USB, but USB devices can still be divided into some common types. Devices...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/38
CPCG06F13/4295
Inventor 张妍彦赵远鸿康利云
Owner SANECHIPS TECH CO LTD
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