CN2489387Y

CN2489387Y - Portable read/write memory with USB interface

Info

Publication number: CN2489387Y
Application number: CN 01232637
Authority: CN
Inventors: 谢燦豪; 施宣明
Original assignee: TAIJUN INDUSTRY Co Ltd
Current assignee: Tge Group Corp; Taiguen Technology Shenzhen Co Ltd
Priority date: 2001-07-31
Filing date: 2001-07-31
Publication date: 2002-05-01
Anticipated expiration: 2011-07-31

Abstract

The utility model relates to a portable read/write memory with an USB interface, consisting of an outer shell and a control circuit in the shell. Wherein, the control circuit includes an USB interface, a flash memory, a CPU and a buffer. Wherein, the CPU completes address strobe and digital to analog conversion. The interface of the CPU is connected with the USB, the flash memory, the buffer as well as an infrared module or a REID module with an induction antenna. The utility model has large memory space, high reliable storage performance, which can be conveniently carried with an appropriate volume as well as can be plugged and played. The utility model integrates REID units or wireless receiving groupwares to be an outer communication interface of a PC, and can be used as an identification recognition unit. Moreover, the utility model can not only excellently realize data encryption but also realize the management of data read/write through physical convert.

Description

Portable readable and writable memory with USB interface

Technical field

The utility model relates to a kind of readable and writable memory, especially a kind of portable readable and writable memory with USB interface.

Background technology

In the mobile storage, ubiquity can't really move the purpose that stores at present, and is most of because volume carries inconvenience too greatly as external hard disk, the external CD writer, and ZIP, MO... etc., these equipment can provide the larger capacity storage but the maneuverability deficiency.As pocket memory, for example, floppy disk, not only to take volume big for special driver, energy consumption, noise is big, and because the floppy drive travelling speed is slow, the storage area is little, and the data storage fiduciary level is lower, except all dangerous characteristics of magnetic medium as storage medium, floppy disk itself is owing to belong to portable product, physical damage appears in the use easily, so existing memory deposited already use on real practicality, but because it is with low cost, and apodia comes out with the high-effect low-cost utility model that replaces it always, also allows floppy drive, floppy disk has survived.

The utility model content

The purpose of this utility model is to provide a kind of portable readable and writable memory with USB interface, memory space is big, memory reliability is high, volume is easy to carry, plug and play, not only can the integrated RF recognition means, perhaps the wireless receiving assembly becomes the peripheral communication interface of PC, and can also be as the person identification device.

Secondary objective of the present utility model is to provide a kind of portable readable and writable memory with USB interface, and it not only can realize the encryption of data preferably, and can realize the management to the data read-write by the switching of physics.

The purpose of this utility model is achieved in that

A kind of portable readable and writable memory with USB interface, it comprises outside housing and the control circuit in the housing, wherein said control circuit comprises USB interface, flash memory, CPU, buffer; Wherein CPU finishes address strobe and digital-to-analog conversion, and its port connects USB, flash memory, buffer.

Described control circuit also comprises read-write control switch, a termination cpu port of read-write control switch, and the other end selects to connect high level or ground connection.

The described read-write control switch portion of controlling is arranged on hull outside portion.

Described be arranged on hull outside portion read-write control switch for the slide switch that can move along guide groove push reset switch or can about remove the switch that sticks up.

Described CPU is connected to the storer of placing electronic lock password or boot.

Described cpu port also is connected to radio receiver.

Described radio receiver can be infrared module or has the radio frequency identification module of induction antenna.

The utlity model has tangible advantage:

1, the utility model is compact, and is big or small as pen, and can provide greater than tens of times of floppy drives even hundreds of times of storage areas; Storage data safety is not easy this physical damage.

2, easy to use, need not take cabinet apart, need only can use by a USB device interface, no separate type driver and disk, easy to use, and existing all PC types all possess USB interface, so there is not the supportive problem of system.

3, except moving the purpose that stores, the utility model maneuverability height, low cost, high power capacity, the more important thing is not to have reaching the purpose of guiding in the presence of the operating system.

4, data storage fiduciary level height; because the storage medium of flash memory is an electronic media, the affected by environment easily and physics strength destruction unlike other magnetic disc type products, fiduciary level is higher; preservation for capsule information provides bigger protectiveness, and the user can be at mobile data more relievedly.

5, data confidentiality, except electric board than the reliable data storage, the utility model provides data security function on the electric board in addition, the user must confirm user's identity by the input validation password at every turn when using electric board, can guarantee that so electric board can be not stolen under situation without permission, in addition and can prevent the user to lose behind the electric board data and be picked up to obtain and read, so can prevent the loss of confidential data fully.

6, aspect computing machine defendance lock; when personal informationization is high more; people are just high more to the dependency degree of information products such as PC class; also just therefore more and more personal information are stored among the PC; people also improve the guard consciousness of PC; therefore except the data in the electric board are protected, can be used as the PC electronic lock.

7, aspect identification, because the modern is to the raising of personal information privacy's demand, the computing machine environment for use demand of safety is also just more and more higher, so the utility model adds the part of RFID (radio frequency identification) transmitting terminal (TAG) in equipment, by the product (as keyboard) of RFID receiving end, can reach the purpose of computer security guard again.

8, the identification on PC, the utility model also can cooperate the radio-frequency (RF) identification gate control system, identification card (TAG) in company's row number is integrated in the utility model, can replaces and existingly carry identification card, and the employee individual is provided mobile data storage; Also can use active transmission cards to strengthen the identification security in addition, range of application such as automobile anti-theft lock, so, the utility model not just is confined to around the PC, also can be applicable in the life products, and more can bring into play the maneuverability of mobile storage, even can be guided out the range of application of mobile authentication.

Description of drawings

Fig. 1 is the utility model external structure synoptic diagram;

Fig. 2 constitutes synoptic diagram for the utility model basic circuit;

Fig. 3 constitutes synoptic diagram for the circuit that the utility model has the wireless receiving part;

Fig. 4 is the utility model circuit theory diagrams;

Fig. 5 is the utility model wireless receiving partial circuit schematic diagram.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done detailed description further.

As shown in Figure 1, 2, 3, the utility model is a kind of portable readable and writable memory with USB interface, and it comprises outside housing 1 and the control circuit in the housing, and wherein control circuit comprises USB interface, flash memory, CPU, buffer; Wherein CPU finishes address strobe and digital-to-analog conversion, and its port connects USB, flash memory, buffer.Window 2 is offered in the outside portion of housing 1, is provided with read-write control switch 3 in the window 2, the read-write control mouthful line of the cpu port of a termination control circuit of switch control end, an end ground connection.Read-write control switch 3 slide switch, or push reset switch for moving along guide groove, or can about remove the switch that sticks up.Have, CPU is connected to the storer of placing electronic lock password or boot, and radio receiver again.As moving the device that stores, the utility model uses flash memory as storing media, and capacity decides according to use flash memory size, removable data or the exchanges data of carrying larger capacity of user, and the flash memory of can connecting comes the increase capacity.

Equipment uses USB interface to link up with PC, must not hang in addition to drive, but plug and play can be given full play to the advantage that stores that moves.

Particular circuit configurations as shown in Figure 4, this equipment is data storage device, can carry out data transmission between the USB mouth by DP, DN two pins and mainboard, with the data in the hard disk therewith the data in the flash memory of equipment carry out being convenient to carrying of data to passing.

The USB input voltage is DC 5V, and the operating voltage of IC is 3.3V, and therefore, circuit has adopted direct current 5V to change the circuit of 3.3V.

U1 is USB IC, is connected with the USB mouth by DATA+, DATA-pin, and it has 15 address wires, 2 groups of data lines, and 32 I/O mouths, and RD, WR pin are arranged, carry out the reading and writing operation of data.

U3 is a flash memory, can with and hard disk between the deposit data transmitted portion within it, after power down, can not lose.

U4 is an impact damper, and 15 address wire A0-A15 are arranged, and 1 group of data line I01/I08 is the place of temporary transient store data.

U6 is connected with main IC by SDA, SCL pin for placing the storer of password, is used for the fetch equipment description, thus the type of identification equipment.

Equipment is inserted mainboard USB mouth, by network DN, DP data transmission is arrived master chip U1, IC from Serial EEPROM U6 sense data, sends reset command after handling simultaneously, and with device reset, this moment, equipment entered normal operating conditions.

Read-write switch SW 1 meets the WP A2 of CPU, and its control termination high level can be permitted read-write; Or, can only read by resistance R 3 ground connection.

After the system reset, begin to carry out data transmission procedure, main frame can be given an order, open sheet choosing end, start control signals such as RD or WR, the data that will read in from hard disk/go out are by its address of address wire gating, by data line transmission data, and deposit it among U4 SRAM or deposit in the U3 flash memory.Wherein CMOS SRAM is equivalent to the effect of buffer memory, and when power down, data wherein can be lost, and the data in the flash memory then can not lost, and therefore, final data all can be placed among the U3 flash memory MEMORY and preserve, so that carry at any time.

Be inserted in USB mouth characteristic when using for a long time by the utility model, the utility model can be added computer guard lock function, the user is not when plugging this device, PC can't start or part software and program can't be carried out, other people enter the computer system user without permission except the prevention of performance computer guard lock, also can be used as the computer service recorder, the everything after an available recording user is logined.

In USB electronic disk, wireless equipment antenna (receiving end) is inserted, because present most wireless devices all need extra receiving equipment to be connected with PC or notebook by PORT COM, and increasing wireless device uses USB port to be used as transmit port, for example, exchanges data of remote control mouse, PDA and PC or the like, under the limited situation of USB port on the PC, perhaps for just to make PC possess the function of accepting wireless signal, as long as the wireless device receiving antenna is integrated in the USB electronic disk by the utility model.It not only increases the practicality of USB electronic disk, also reduces the increase because of wireless device, and causes USB mouth deficiency.Physical circuit as shown in Figure 5, wireless device can be infrared ray (Ir) equipment, radio-frequency apparatus (RF), and RFID, outside data message be by the TAG_DATA wireless path, the induced signal of antenna for example, or the infrared device of accepting enters receiving element.After data enter receiving element, be forwarded to transmitting element, data be sent among the CPU of Fig. 4 by TX-PW pin in the transmitting element, among Fig. 4 CPU by SDA and, the SCL pin accepts data, and gives PC by the USB oral instructions.

Mainly based on radio frequency (RF) radio transmission apparatus and infrared ray (Ir) radio transmission apparatus, can decide transmission mode and transmission frequency in the wireless device according to the arrange in pairs or groups wireless device that uses.In the RF wireless device, any use RF transmission, and the product that receiving end is integrated in the USB electronic disk all meets the utility model design philosophy, as RFID radio-frequency (RF) tag receiving end.

In the utility model, add transmitting terminal function in the radio-frequency (RF) tag (RFID), these parts can be replaced employed label according to different gate control systems, label segment is if cooperate other gate control systems then to be provided by the gate control system merchant, be integrated in the equipment, or in PC, add RFID receiving end part, can use the utility model to carry out the identification of PC end, for mobile office and the mobile meaning that stores bigger extension has been arranged, mobile storage not just can use on PC, in general life, the utility model can be used as electronic identity authentication center, as gate control system, and automobile anti-theft lock ... etc.

Claims

1, a kind of portable readable and writable memory with USB interface, it comprises outside housing and the control circuit in the housing, it is characterized in that: described control circuit comprises USB interface, flash memory, CPU, buffer; Wherein CPU finishes address strobe and digital-to-analog conversion, and its port connects USB, flash memory, buffer.

2, the portable readable and writable memory with USB interface according to claim 1, it is characterized in that: described control circuit also comprises read-write control switch, a termination cpu port of read-write control switch, the other end selects to connect high level or ground connection.

3, the portable readable and writable memory with USB interface according to claim 2 is characterized in that: the described read-write control switch portion of controlling is arranged on hull outside portion.

4, according to claim 2 or 3 described portable readable and writable memories, it is characterized in that with USB interface: described be arranged on hull outside portion read-write control switch for the slide switch that can move along guide groove push reset switch or can about remove the switch that sticks up.

5, the portable readable and writable memory with USB interface according to claim 1 is characterized in that: described CPU is connected to the storer of placing electronic lock password or boot.

6, the portable readable and writable memory with USB interface according to claim 1, it is characterized in that: described cpu port also is connected to radio receiver.

7, the portable readable and writable memory with USB interface according to claim 6 is characterized in that: described radio receiver can be infrared module or has the radio frequency identification module of induction antenna.