CN2610415Y

CN2610415Y - USB flash electronic disk capable of read-write multiple standard cards

Info

Publication number: CN2610415Y
Application number: CN 02253191
Authority: CN
Inventors: 张革清; 冷闻华
Original assignee: Shenzhen Sinoinfo Technology Development Co Ltd Beijing Branch
Current assignee: Shenzhen Sinoinfo Technology Development Co Ltd Beijing Branch
Priority date: 2002-09-24
Filing date: 2002-09-24
Publication date: 2004-04-07
Anticipated expiration: 2012-09-24

Abstract

A USB quickflashing electronic disk which can read and write a plurality of standard storage cards relates to a multifunctional mobile storage device, mainly characterized in that the utility model employs the USB interface and a built-in Flash storage chip and can read and write flash memory cards according with the international standard such as MMC/SD, CF, MS, SM and so on through card bases of the flash memory cards on the device. The built-in Flash is appeared on the mode of a movable disk and has the writing protecting function which can provide the user a data storage space having the determined safety insulating function. The product hardware employs the standard protocol and has high integration with the Windows 2000/XP/ME/98 operating system, and the utility model can realize the plug and play through the USB connector of the device connecting with various USB interfaces of different computer mainframes. At the same time, the utility model supports the cross-platform data exchange of the storage card information of the device such as digital camera, PDA, digital image and sound player, digital recorder, digital vidicon, and so on.

Description

The USB quickflashing electric board of read-write multiple standards storage card

Technical field

The utility model relates to a kind of electronic data flash memory device, relates in particular to the external mobile electron storer of portable minisize of the band USB interface (computer universal serial bus interface) of read-write multiple standards storage card, i.e. USB quickflashing electric board.Can cooperate with data processing main frames such as computing machines and be used for preservation, backup and swap data, file etc.

Background technology

Floppy disk is small and exquisite, portable with it as the standard configuration of computing machine to be the favor that originally characteristic is subjected to just not using the person really.But along with making rapid progress of computer technology, the capacity of floppy disk is little, speed is slow, fragile etc., and shortcoming comes out gradually, and brings very big inconvenience to the user in real work.The floppy disk technology can not satisfy the needs to new technology that computing machine development brings day by day, is badly in need of seeking a kind of removable memory technology of suitable upgrading.

At present the mechanical type information that exists reads movable storage device owing to use mechanical hook-up, brought bulky, energy consumption is big, noise is big, shortcoming such as fragile.This type of storer apply not to use in practicality already, but because historical evolution, and technology maturation, reason such as with low cost are simultaneously because attached to some application above it, such as startups, virus killing etc., these have all prolonged the life-span of its existence.So still continuing to use so far.

More existing USB electronic disks mainly are to be storage medium with the Flash chip, and this can only play the mobile storage effect, and can not realize any replacing of storage medium.The utility model solves this problem.

The utility model content

The purpose of this utility model is to provide a kind of product with USB interface, and it is simple for structure, reliability is high, possess extended capability and data exchange capability and portable minisize external connected electronic storer easy to use.

The technical scheme that its technical matters that solves the utility model adopts is: be made of the special IC of the band USB communication interface of number letter design in a slice and customized production, built-in Flash storage chip, the flash card deck, flash card, USB connector, LED and the crystal oscillating circuit that meet international standard, reach the function that realizes read-write multiple storage card.

The beneficial effects of the utility model are:

1, the built-in NAND-Flash storage chip of special chip A0301 of middle several letter company's research and development and customized production even do not use flash card that the memory capacity of 8M to 128M also can be provided, also can reach tens of times of current 3.5 o'clock floppy disk capacity.

2, when needs use more high capacity, the available standards flash card is expanded and can be changed at any time, and along with the development of technology, the flash card that capacity is bigger will constantly occur, and the user can select arbitrarily according to the needs of oneself.

3, the utility model can be read and write the MD hard disk of MemoryStick card, CF card and the IBM Corporation of mmc card, SD card, SM card, Sony company.These cards all have corresponding ISO (International Standards Organization) or mechanism at present, are used widely on the electronic product that much needs storer.The utility model has made things convenient for the data of these electronic equipments to share.

4, easy to use.USB interface has become the computing machine standard configuration, so do not need to take apart cabinet when using, does not also need other interface, separate type driver and adapter in addition, and does not also have system's support issue.

5, combine closely with Windows operating system.The utility model is followed standard agreement, when using in Windows ME, Windows2000 and subsequent operation system thereof, need not install driver, and the Software tool direct access that support utilizes Windows to provide is supported hot plug.

6, owing to adopted standard flash memory card as storage medium, do not need to use mechanical hook-up to read and write, this makes that the performance of entire product is promoted greatly.Reduce the volume of product, improved serviceable life, strengthened impact resistance.Can protect the superincumbent data of storage safely.

Description of drawings

Fig. 1 is hardware capability structural framing figure of the present utility model

Fig. 2 is a circuit diagram of the present utility model

Fig. 3 is the utility model driver structured flowchart

Fig. 4 is the utility model software operation process flow diagram

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

As Fig. 1, shown in 2, the utility model be a kind of with USB interface, equipment built-in NAND-Flash chip, read-write standard flash memory card arranged.Wherein control circuit comprises USB interface [J1], flash card deck [CFC, MMC, MSC and SMC], middle number letter special ICs [U1], configuration information storer EEPROM[U2], crystal oscillating circuit, power circuit etc.

In hardware, the main control chip that adopts is middle number letter A0301, this chip self-carried USB controller (following the USB1.1 agreement fully), read-write NAND-Flash chip, read-write SM card, MMC/SD card, CF card and MS card, wherein the CF card also can be used to read and write the MD hard disk of IBM.The A0301 chip carries 5 volts to 33 volts DC-DC change-over circuit, can adopt the external power source change-over circuit simultaneously.In this design, also adopted the dual power supply pattern, promptly can power, also can use external 5V power supply from usb bus, D3, D4, F1, F2 are used for the overvoltage/overcurrent protection of power supply.

EEPROM is optional device in the circuit, and when using it, equipment can be set in EEPROM with the logical order of Card Type and card, and the descriptor of relevant product also can be provided with in EEPROM.When not using EERPOM, available Card Type is by the 1st～5 setting of switch SW 1, and the descriptor of product then Uses Defaults.SW1.6 is used for selecting whether to use outside DC/DC conversion electric power, during this switch closure, A0301 uses the external conversion power supply, and this moment, the DC/DC converter of A0301 chip internal was closed, the 6th pin (VDDF) is the power supply input pin, is used for to inner interface circuit power supply; When SW1.6 opens, use the DC/DC power source conversion of A0301 chip internal, VDDF is the power supply output pin, is used for to each flash card power supply.SW1.7 is used for the write-protect of EEPROM.

The 37th pin USBPlgIn of U1 is used for detecting whether be connected to usb bus, this uses very again when using external power supply, equipment is only just opened inner USBVCC output (the 4th pin) when being connected to usb bus, connect and start working to the main frame reporting facility by resistance R 19.Equipment will be in the low-power consumption standby state when no USB connects.

User's operation for convenience also is provided with the LED light circuit in the circuit, wherein SM_CDL, SD_CDL, CF_CDL, MS_CDL snap into a pilot lamp control signal, and SM_WKL, SD_WKL, CF_WKL, MS_WKL are card read-write pilot lamp control signals.

Built-in Flash chip possesses the write-protect function.After powering on; A0301 chip acquiescence can not be carried out write operation to built-in Flash; after the 39th pin that a low level pulse is added to U1 was, the A0301 chip was cancelled the write-protect state of built-in Flash, then enters the write-protect state when next low level pulse arrives once more.Use for convenient, the tool software that moves in operating system is by sending the write-protect state that particular command also can change built-in Flash to equipment.The write-protect state of built-in Flash by the pilot lamp of FL_WPL signal controlling to user prompt, read-write operation by the pilot lamp of FL_WKL signal controlling to user prompt.

The software aspect, in Windows 2000/XP/Me operating system, can directly use its USB Mass Storage driver that carries to operate built-in Flash, but the operation flash card then needs install driver, these drivers have in the subsidiary CD of product, also be installed in advance when product export in the built-in Flash chip simultaneously, the user can directly install in operating system and the CD that do not need to use product to attach.Windows 98 times, then need all drivers to be installed with CD.Process flow diagram is seen accompanying drawing 3,4.

Claims

1; a kind of equipment of read-write standard flash memory card; has USB interface; built-in Flash chip; mainly refer to comprising SM card (Smart Media Card); mmc card (MultiMedia Card); SD card (Secure Digital Memory Card); CF card (Compact Flash Card); MD hard disk (IBM Macro Driver); MS card (SONY Memory Stick Card) is at the read-write control circuit of interior various flash cards; and to the control circuit and the read-write protection control mode of built-in Flash storage chip; it is characterized in that: described control circuit comprises USB connector; the A0301 special chip; adopt built-in Flash storage chip and standard flash memory card interface, wherein A0301 finishes USB interface; built-in Flash storage chip and comprise above-mentioned SM card; mmc card; the SD card; the CF card; the control of MS card and MD hard disk.

2, ability and the data interchange capacity that can expand memory capacity by the standard flash memory card of read-write with USB interface according to claim 1, it is characterized in that: equipment has the deck of reading and writing standard flash memory card, can insert the flash card of different capabilities, with this kind means extension storage capacity.

3; read-write protection control method with built-in Flash chip according to claim 1; make product provide a secure data storage space that possesses certain isolation features by this method for the user; it is characterized in that: built-in Flash occurs in a moveable magnetic disc mode under operating system; and possesses the write-protect function; the user can remove the write-protect state by the write-protect button on the manual handling equipment; press this button once more and then reenter the write-protect state; allow to use specific purpose tool software simultaneously; cooperate the parameter setting among the EEPROM; enter/withdraw from the write-protect state with software control; perhaps cooperate the parameter setting among the EEPROM; only allow software control to enter the write-protect state; and not allowing to withdraw from the write-protect state, the releasing write-protect must be pressed the write-protect button by hand and be realized.