CN202307150U

CN202307150U - U disk with OTG (On-The-Go) reading function

Info

Publication number: CN202307150U
Application number: CN2011203900704U
Authority: CN
Inventors: 曹璐; 徐剑
Original assignee: Nantong Xinying Design Service Co Ltd
Current assignee: Nantong Xinying Design Service Co Ltd
Priority date: 2011-10-11
Filing date: 2011-10-11
Publication date: 2012-07-04
Anticipated expiration: 2021-10-11

Abstract

The utility model discloses a U disk with an OTG (On-The-Go) reading function. The U disk is characterized in that: one end of the U disk is provided with a USB (Universal Serial Bus) male connector, and the other end of the U disk is provided with a mini USB or micro USB connector, or a USB female connector or a USB male connector; and all these connectors are in data connection with a storage chip in the U disk. By utilizing the U disk with the OTG reading function provided by the utility model, the U disk can be directly read by electronic equipment with the OTG reading function such as a mobile phone, a digital camera and an MP3, is convenient to use and has no more need of OTG connecting line.

Description

USB flash disk with OTG read functions

Technical field

The utility model relates to a kind of USB flash disk of the OTG of having read functions, belongs to the technical field of memory storage.

Background technology

OTG is the abbreviation of On-The-Go, is the technology that developed recently gets up, and is announced by USB Implementers Forum Dec 18 calendar year 2001, is mainly used in the connection between various equipment or mobile device, carries out exchanges data.Particularly PDA, mobile phone, consumer devices.Change like the multiple different systems connectors of equipment room such as digital camera, video camera, printer, the inconvenience of exchanges data between the storage card of multiple standard.

The development of USB technology; Make PC and peripheral equipment the equipment of various data rates to be linked together through the manufacturing cost of plain mode, appropriateness, above-mentioned we mention application, can pass through usb bus; As the periphery of PC, under the control of PC, carry out exchanges data.But this exchanged form easily, in case left PC, each equipment room can't utilize the USB mouth to operate, because the neither one slave unit can serve as the same Host of PC.

The OTG technology is exactly to be implemented under the situation that does not have Host, realizes that the data between slave unit transmit.For example digital camera is directly connected on the printer, through the OTG technology, connects the USB mouth of two equipment rooms, and the photograph of taking is printed immediately; Also can the data in the digital camera be sent to through OTG on the portable hard drive of USB interface.

Birth since USB host-host protocol in 1996; And with its advantage very fast fashionable all computer peripheral equipments and digital equipment; USB device is divided into HOST (main equipment) and SLAVE (slave unit) as you know; Have only the transmission that when a HOST is connected with a SLAVE, could realize data, OTG equipment is exactly to be that our " EX " can serve as HOST, also can serve as SLAVE.

USB combines with flash memory, and creativeness has expedited the emergence of widely popular movable storage device-USB flash disk at present.

Equipment and data transfer between devices when the release of USB OTG technology then can realize not having main frame.For example: digital camera can directly be connected with printer and photograph print, thereby has expanded USB The Application of Technology scope.

The USB otg standard has increased power management (saving power consumption) function on the basis of complete compatible USB2.0 standard, its permission equipment both can be used as main frame, also can be used as peripheral hardware operation (dual-purpose OTG).The OTG double-duty plant meets the USB2.0 standard fully, and certain main frame detectability can be provided, and supports main frame circular order agreement (HNP) and session request agreement (SRP).In OTG, Initial master equipment is called A equipment, and peripheral hardware is called B equipment.The connected mode of available cable decides initial roles.Shown in Figure 2 is the synoptic diagram of confirming default host with the 5th ID pin, and double-duty plant uses novel mini-AB socket, thereby makes mini-A plug, mini-B plug and mini-AB socket increase the 5th pin (ID), to be used to discern different cable end points.ID pin ground connection in the mini-A plug, the ID pin in the mini-B plug is floating empty.When OTG Equipment Inspection during to the ID pin of ground connection, the expression acquiescence be A equipment (main frame), detect floating this equipment of ID pin and then think B equipment (peripheral hardware).System is in case after connecting, the role of OTG can also change.

Main frame and peripheral hardware adopt new HNP, and A equipment partly provides the VBUS power supply as default host, and when the equipment that detected connects reset bus, enumerate and dispose B equipment.Otg standard is that second New Deal that USB increases is called session request agreement (SRP).SRP allows B device request A equipment to open the VBUS power supply and start once dialogue.An OTG dialogue can provide the time of VBUS power supply to confirm (annotate: A equipment is always the VBUS power supply, even as peripheral hardware) through A equipment.Also can finish one through A device shutdown VBUS power supply and dodge session to save power consumption, this is very important in the powered battery product.For example, when two cell phones were intercoursed information through connection, a mini-A end that is connected the expense electricity was an A equipment, is defaulted as main frame.Another is a B equipment, is defaulted as peripheral hardware.When not needing usb communication, A equipment can be closed the VBUS line, and B equipment will detect this state and get into merit low consumption pattern this moment.

Need on basic USB peripheral hardware, add circuit when making up the OTG function, the USB controller in the circuit can be a microprocessor and USB SIE (serial ports engine), also can be integrated μ P/USB chip or the ASIC that links to each other with the USB transceiver.For providing the external unit of power supply, bus needs one road 3.3V voltage stabilizing output supply voltage, so that be that logical circuit provides power supply with the 1500 Ω resistance that are connected D+, D-pin.Can send the signal that equipment has connected to main frame through the pull-up resistor on D+, the D-pin, and the operating rate of indicating equipment.Resistance is pulled to D+ and representes full speed running, and resistance is pulled to D-and representes slow running.Other end points (the 15k Ω pull down resistor that comprises D+ and D-) is used to detect the state of pull-up resistor.Because the USB design demand provides the hot plug function.Therefore, its esd protection circuit is mainly used in to D+, D-and VBUS pin protection is provided.

In order to increase the double-purpose functional of OTG, must expand transceiver function and make OTG equipment both can be used as the main frame use, also can be used as peripheral hardware and use.Most of circuit of the required interpolation of transceiver are used for the management of VBUS pin.As main frame, it must provide 5V, output current can reach the power supply of 8mA.

As mentioned above, USB combines with flash memory, and creativeness has expedited the emergence of widely popular movable storage device-USB flash disk at present.USB flash disk is because its characteristics portable, capacious; Be widely used in OTG especially and read, but the problem that exists aspect reading at OTG at present is, as the electronic equipments such as mobile phone, digital camera, MP3 with OTG function are when reading USB flash disk; The OTG connecting line that often needs a Gent system; This OTG connecting line can be connected electronic equipment with USB flash disk or portable hard drive, card reader etc., but the use of this data line is cumbersome, does not also have directly to read at present the equipment of USB flash disk.

The utility model content

The technical matters that the utility model will solve is: the electronic equipment such as mobile phone, digital camera, MP3 with OTG function is when reading USB flash disk; The OTG connecting line that often needs a Gent system; This OTG connecting line can be connected electronic equipment with USB flash disk or portable hard drive, card reader etc.; But the use of this data line is cumbersome, does not also have directly to read at present the equipment of USB flash disk.

In order to solve the problems of the technologies described above, the utility model discloses USB flash disk with OTG read functions, particular content is following:

A kind of USB flash disk with OTG read functions; It is characterized in that: said USB flash disk has the USB male joint at the one of which end; Have miniUSB or microUSB joint or USB female joint or USB male joint at its other end, these joints all with USB flash disk in storage chip form data and be connected.

About male joint and female joint, be the joint that is used for " insertion " and " being inserted into " naturally, this is the known technology of this area, no longer sets forth at this.

Preferably, said USB flash disk all has the lid of protection joint at its two ends.

Preferably, said lid is processed by transparent material.

The beneficial effect of the utility model is: utilizes the USB flash disk of the described OTG of the having read functions of the utility model, can make electronic equipments such as mobile phone with OTG read functions, digital camera, MP3 directly read USB flash disk, and easy to use, no longer need the OTG connecting line.

Description of drawings

Accompanying drawing 1 is the structural representation of the USB flash disk of the described OTG of the having read functions of the utility model;

Reference numeral 1-lid wherein, 2-USB male joint, 3-miniUSB joint.

Embodiment

Combine accompanying drawing that the utility model is further described at present.

As shown in Figure 1, a kind of USB flash disk with OTG read functions is characterized in that: said USB flash disk has USB male joint 2 at the one of which end, has miniUSB3 at its other end, these joints all with USB flash disk in storage chip form data and be connected.

Preferably, said USB flash disk all has the lid 1 of protection joint at its two ends.

Preferably, said lid 1 is processed by transparent material.

Claims

1. USB flash disk with OTG read functions; It is characterized in that: said USB flash disk has the USB male joint at the one of which end; Have miniUSB or microUSB joint or USB female joint or USB male joint at its other end, these joints all with USB flash disk in storage chip form data and be connected.

2. the USB flash disk with OTG read functions as claimed in claim 1 is characterized in that: said USB flash disk all has the lid of protection joint at its two ends.

3. the USB flash disk with OTG read functions as claimed in claim 2 is characterized in that: said lid is processed by transparent material.