Unlock instant, AI-driven research and patent intelligence for your innovation.

Double-mode general-purpose serial bus equipment and control method thereof

A universal serial bus and device controller technology, applied in the field of dual-purpose universal serial bus devices, to achieve the effect of high-speed data transmission

Active Publication Date: 2011-04-13
VIA TECH INC
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, implementing the host negotiation protocol will require complex instructions and state machines

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double-mode general-purpose serial bus equipment and control method thereof
  • Double-mode general-purpose serial bus equipment and control method thereof
  • Double-mode general-purpose serial bus equipment and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Fig. 1 shows an embodiment of the universal serial bus device according to the present invention. As shown in the figure, the Universal Serial Bus device 100, hereinafter referred to as the USB device 100, includes a USB host controller 10, a USB device controller 20, a judging unit 30, a multiplexer 40, an interface unit IFA 50, a ground pin GND, Data transmission pins D+ and D-, confirmation pin ID and bus power pin Vbus. For example, the USB device 100 can be a transactional electronic product or a consumer electronic product, such as a personal digital assistant, a mobile phone, a digital camera, a printer, an audio player, a voice recorder, and a display, but not limited thereto.

[0015] The USB host controller 10 is used to make the USB device 100 work as a USB master device, and has an interface unit IF1 12 coupled to the judging unit 30, and the USB device controller 20 is used to make the USB device 100 work as a USB peripheral device, and An interface unit I...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a dual-mode universal serial bus (USB) device and control method thereof, wherein the USB device is used to transmit data between the equipments with universal serial bus interfaces. The dual-mode USB device includes an interface unit, for transmitting data; a judging unit, coupled to the interface unit for judging the USB device is a USB master equipment or a USB peripheral device; a device controller, for judging whether to supply the USB peripheral device or not according to the logical bit on the bus power supply pin; and a host controller controller, for judging the USB master equipment operates in a normal power supply mode or an over-current mode according to the logical bit on the bus power supply pin.

Description

technical field [0001] The present invention relates to a universal serial bus (USB, Universal Serial Bus) device, in particular to a dual-purpose universal serial bus device that can be used as a host or a peripheral device. Background technique [0002] With the popularization of consumer electronic products, such as personal digital assistant (PDA, Personal Digital Assistant), mobile phone, digital camera, printer, etc., the high-speed data transmission technology used between these devices and computers or between devices is becoming more and more It has attracted more and more attention, among which IEEE 1394 and Universal Serial Bus are the two main standards of this type of transmission technology. IEEE 1394 supports higher data transmission speed, but is relatively complex and expensive, and is mainly used in products that require high-speed communication, while the universal serial bus is mainly used in low-speed data transmission applications, such as USB1.1 suppo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/38G06F13/40
Inventor 陈诗雯林志钢陈有汉
Owner VIA TECH INC