CN2495017Y

CN2495017Y - Universal serial bus interface flash store

Info

Publication number: CN2495017Y
Application number: CN 01234694
Authority: CN
Inventors: 王伟良; 贾宗铭
Original assignee: Ramaxel Technology Shenzhen Co Ltd
Current assignee: Ramaxel Technology Shenzhen Co Ltd
Priority date: 2001-08-29
Filing date: 2001-08-29
Publication date: 2002-06-12
Anticipated expiration: 2011-08-29

Abstract

The utility model discloses a general temporary memorizer with a paralleled bus interface; the memorizer is connected with a computer by using of the paralleled bus interface; the electrocircuit comprises a FLASH chip, an electrical source module, a microprocessor chip including USB interface controller, an EEPROM, a read-write control electrocircuit and a USB slot; the USB slot is respectively connected with a USB cable, a USB interface and an power supply; the FLASH chip is respectively connected with the power supply, the microprocessor chip U1 and the read-write control electrocircuit; the microprocessor chip U1 is also respectively connected with the EEPROM and the read-write control electrocircuit; the utility model can overcome the problems that: the speed for the storage by a floppy disk is slow; the reliability is much worse, and the storage and change for the image, audio frequency and video frequency data are not adaptive and so on. The utility model has the advantages of small volume, wide application range, convenient use, large storage ability, fast read-write speed, safe utilization and high reliability and so on. The utility model can be widely applied in each kind of general PC and notebook PC.

Description

A kind of USB (universal serial bus) flash memories

Technical field the utility model relates to a kind of USB (universal serial bus) flash memories, promptly relate to a kind of USB interface FLASH storer that is used for the mobile data storage, be a kind of movable memory equipment that is applied to desktop computer, notebook computer, by USB interface and computer interconnection and swap data.

Background technology in the prior art, the external memory storage that is adopted is a disk always.Floppy disk from initial 512K, 1.2M, goes so far as the 1.44M that is still using now as a kind of medium of being convenient to carry out exchanges data between different computers.Along with development of computer, a large amount of patterns, audio frequency, video data need storage and exchange on PC.By contrast, the flexible plastic disc of 1.44M can't be competent at present needs already on memory capacity.Secondly, floppy disk is as a kind of storer of magnetic medium, and the floppy disk that read-write need have mechanical action carries out, and its speed is very slow, and reliability is also relatively poor relatively.Except using floppy disk, also have some other equipment can be used for the storage of mobile data now, as removable hard disk, MO, CD-RW, ZIP dish, SmartMedia card and CompactFlash card etc., but these equipment each have different shortcomings, removable hard disk damages easily, and ZIP dish, MO, CD-RW, martMedia card and CompactFlash card etc. all need extra driving arrangement support, portably use very inconvenient.

The technical scheme the purpose of this utility model be to provide a kind of move and easy to use, need not to install that extra driver and external power supply, memory capacity are big, read or write speed reaches the high USB (universal serial bus) flash memories of reliability soon, to substitute or additional floppy disk and existing movable storage device.

In order to achieve the above object, the utility model provides following technical scheme: design a kind of USB (universal serial bus) flash memories, connect computer and this storer by USB (universal serial bus), circuit comprises the FLASH chip, power module, the microprocessor chip that comprises usb interface controller, EEPROM, read-write control circuit, the USB slot, the USB slot respectively with USB cable, USB interface and power supply link to each other, the FLASH chip respectively with power supply, microprocessor chip U1 and read-write control circuit link to each other, and microprocessor chip U1 links to each other with EEPROM and read-write control circuit respectively again.

In implementing process of the present utility model, design for hardware, it at first is the selection of considering interface between this peripheral hardware storer and the computing machine, USB (universal serial bus) (English Universal Serial Bus abbreviation) is by seven tame world-renowned computing machines and communication company's initiation and formulations such as Intel, Compaq, Digital, IBM, Microsoft, NEC, Northern Telecom, USB is the new interface technology that is applied in the PC field, and it can be connected to the peripherals of PC on the main frame easily.Therefore, the utility model has adopted USB interface, and it utilizes USB interface to connect computer and this external storage.On the one hand, it provides the passage of data transmission, provides work energy to aforesaid external storage simultaneously.

The utility model technical scheme preferably can be: read-write control circuit has read-write protection switch U6, U6 and chip U1 link to each other with chip U2 and short circuit after ground connection.The effect of read-write control circuit is to allow this FLASH storer to be set to one of " read-only " or " read-write " two states, reaches the purpose that prevents that data from being deleted by mistake.Specifically, its circuit mainly is made up of write-protect switch U6, ground connection behind 1,2,3, the 4 and 6 pin short circuits of U6, and 7 pin of U6 are connected to 21 pin of U1 and 19 pin of U2.

The utility model technical scheme preferably can be again: power module comprises chip U5 and a plurality of electric capacity, chip U5 links to each other with USB port U4, chip U5 links to each other with capacitor C 1 and by capacitor C 1 ground connection, the pin 3 of chip U5 is the output of power Vcc and passes through capacitor C 2, C6, C7, C8, C9 and C10 ground connection.The effect of power module is that 1 pin from the USB slot is obtained+5V voltage, carries out providing after conversion and the voltage stabilizing supply of electrical energy of whole device.Specifically, power unit is mainly combined by chip U5 and a plurality of electric capacity, and 2 pin of chip U5 are received 1 pin of USB port U4, and 2 pin of chip U5 are also by capacitor C 1 ground connection simultaneously, 3 of the pins of chip U5 are the output Vcc of power supply, it provides electric energy for all circuit, and 3 pin of U5 also pass through capacitor C 2, C6, C7, C8, C9, C10 ground connection.

The utility model technical scheme preferably also can be: EEPROM has chip U3 and a plurality of resistance, chip U3 be connected with power Vcc and short circuit after ground connection, the bipod of chip U3 links to each other with the bipod of chip U1 respectively, and chip U3 links to each other with power Vcc by being parallel resistor R6, R7 respectively.EEPROM provides the partial parameters storage space of this FLASH storer, it mainly is made of U3 and part resistance, its concrete connected mode is: 1 pin of chip U3 is connected to power Vcc, 2 of chip U3, ground connection behind the 3 and 7 pin short circuits, 5 pin of chip U3 are received 35 pin of chip U1, and 6 pin are received 36 pin of U1, and 5,6 pin of chip U3 are received power Vcc by pull-up resistor R6, R7 respectively simultaneously.

The utility model technical scheme preferably can be again: be connected with power Vcc behind the bipod short circuit of FLASH chip U2 and short circuit after ground connection, 29 of chip U2,30,31,32,41,42,43 and 44 pin respectively with 24 of chip U1,25,26,27,28,29,30 link to each other with 31 pin, and 7,8,9,16,17 of chip U2 links to each other with 39 pin with 16,40,18,19,17 of chip U1 respectively with 18 pin, and 7,8,18 of chip U2 is connected with power Vcc by resistance R 15, R14, R13 and R12 respectively with 19 pin.Described FLASH chip provides the data space of this FLASH storer.

The utility model technical scheme preferably also can be: the USB slot is connected with chip U1 with R4 by resistance R 3, R2 respectively.The USB slot provides the power supply of this FLASH storer on the one hand, also be the passage that this storer is connected with computer on the other hand, its concrete connected mode is: pin 2 is connected to 41 pin of chip U1 by resistance R 3, pin 3 is connected to 43 pin of chip U1 by resistance R 2, and pin 3 is connected to 42 pin of chip U1 by resistance R 4 simultaneously.

The utility model technical scheme preferably can also be: the microprocessor chip U1 that comprises usb interface controller, 10 pin of chip U1 link to each other with power Vcc and pass through 7 pin ground connection, 13 pin of chip U1 also are connected to power Vcc by capacitor C 3, chip U1 is simultaneously by resistance R 1 and resistance R 5 difference ground connection, chip U1 also is connected with power Vcc with resistance R 11 by resistance R 10 respectively, 1 end of LED 1 links to each other with resistance R 9, its 2 end ground connection, chip U1 links to each other with 1 end of LED 1 by resistance R 9, crystal oscillator Y1 and resistance R 8 parallel connections, the two ends of crystal oscillator Y1 link to each other with the bipod of chip U1 respectively, and the two ends of crystal oscillator Y1 are respectively by capacitor C 4, C5 ground connection.Microcontroller U1 is the core parts of this device.

Compared with prior art, the utlity model has following tangible advantage: 1, volume of the present utility model is little, is easy to carry; 2, the utility model is supported Windows 98/SE, WindowsMe, and a plurality of operating systems such as Windows 2000, thereby, applied range; 3, the utility model need not to install extra driver, does not need external power supply, plug and play, and warm swap, thereby easy to use; 4, its memory capacity is big, and 8M is arranged, 16M, and 32M, 64M is up to 1G always, thereby adaptability is strong, can adapt to the requirement of modern great amount of images, audio frequency, video data; 5, have read or write speed faster, be 20 times of floppy disk, thereby technique effect is good; 6, have identification and safety encipher function, thus safe in utilization; 7, memory reliability height, antidetonation, protection against the tide, the assurance data can not lost.

Be drawing explanation of the present utility model below the description of drawings:

Fig. 1 is based on the structural representation block diagram of the FLASH external storage of USB interface;

Fig. 2 is based on the circuit theory diagrams of the FLASH external storage of USB interface.

Among Fig. 1, clearly represented a kind of USB (universal serial bus) flash memories.

Among Fig. 2, clearly represented the annexation of a parallel circuit and components and parts in the circuit.

Embodiment carries out more detailed description below in conjunction with the embodiment of " remembering little sudden strain of a muscle despot " to the utility model:

With reference to Fig. 1, it comprises the FLASH chip, power module, the microprocessor chip, EEPROM, read-write control circuit, the USB slot that comprise usb interface controller, the USB slot FLASH chip that links to each other with USB cable, USB interface and power supply respectively links to each other with power supply, microprocessor chip U1 and read-write control circuit respectively, and microprocessor chip U1 links to each other with EEPROM and read-write control circuit respectively again.

With reference to Fig. 2, read-write control circuit has read-write protection switch U6, ground connection behind 1,2,3, the 4 and 6 pin short circuits of U6, and 7 pin of U6 are connected to 21 pin of U1 and 19 pin of U2; Power unit is mainly combined by chip U5 and a plurality of electric capacity, 2 pin of chip U5 are received 1 pin of USB port U4, also by capacitor C 1 ground connection, 3 of the pins of chip U5 are the output Vcc of power supply to 2 pin of chip U5 simultaneously, and it provides electric energy for all circuit, 3 pin of U5 are also by capacitor C 2, C6, C7, C8, C9, C10 ground connection; EEPROM mainly is made of chip U3 and part resistance, 1 pin of chip U3 is connected to power Vcc, 2 of chip U3, ground connection behind the 3 and 7 pin short circuits, 5 pin of chip U3 are received 35 pin of chip U1,6 pin are received 36 pin of U1, and 5,6 pin of chip U3 are received power Vcc by pull-up resistor R6, R7 respectively simultaneously; Be connected with power Vcc behind the bipod short circuit of FLASH chip U2 and short circuit after ground connection, 29,30 of chip U2,31,32,41,42,43 and 44 pin respectively with 24,25 of chip U1,26,27,28,29,30 link to each other with 31 pin, and 7,8,9,16,17 of chip U2 links to each other with 39 pin with 16,40,18,19,17 of chip U1 respectively with 18 pin, and 7,8,18 of chip U2 is connected with power Vcc by resistance R 15, R14, R13 and R12 respectively with 19 pin; : the pin 2 of USB slot circuit is connected to 41 pin of chip U1 by resistance R 3, and pin 3 is connected to 43 pin of chip U1 by resistance R 2, and pin 3 is connected to 42 pin of chip U1 by resistance R 4 simultaneously; The microprocessor chip U1 that comprises usb interface controller, 10 pin of chip U1 link to each other with power Vcc and pass through 7 pin ground connection, 13 pin of chip U1 also are connected to power Vcc by capacitor C 3, chip U1 is simultaneously by resistance R 1 ground connection, it is 37 by resistance R 5 ground connection, 14 of chip U1,15 pin are connected with power Vcc with resistance R 11 by resistance R 10 respectively, 1 end of LED 1 links to each other with resistance R 9, its 2 end ground connection, 20 pin of chip U1 link to each other with 1 end of LED 1 by resistance R 9, crystal oscillator Y1 and resistance R 8 parallel connections, the two ends of crystal oscillator Y1 respectively with 8 of chip U1,9 pin link to each other, and the two ends of crystal oscillator Y1 are respectively by capacitor C 4, C5 ground connection.

Claims

1, a kind of USB (universal serial bus) flash memories, connect computer and this storer by USB (universal serial bus), it is characterized in that: circuit comprises the FLASH chip, power module, the microprocessor chip, EEPROM, read-write control circuit, the USB slot that comprise usb interface controller, the USB slot links to each other with USB cable, USB interface and power supply respectively, the FLASH chip links to each other with power supply, microprocessor chip U1 and read-write control circuit respectively, and microprocessor chip U1 links to each other with EEPROM and read-write control circuit respectively again.

2, storer according to claim 1 is characterized in that: read-write control circuit has read-write protection switch U6, U6 and chip U1 link to each other with chip U2 and short circuit after ground connection.

3, storer according to claim 1, it is characterized in that: power module comprises chip U5 and a plurality of electric capacity, chip U5 links to each other with USB port U4, chip U5 links to each other with capacitor C 1 and by capacitor C 1 ground connection, the pin 3 of chip U5 is the output of power Vcc and passes through capacitor C 2, C6, C7, C8, C9 and C10 ground connection.

4, storer according to claim 1, it is characterized in that: EEPROM has chip U3 and a plurality of resistance, chip U3 be connected with power Vcc and short circuit after ground connection, the bipod of chip U3 links to each other with the bipod of chip U1 respectively, and chip U3 links to each other with power Vcc by being parallel resistor R6, R7 respectively.

5, storer according to claim 1, it is characterized in that: be connected with power Vcc behind the bipod short circuit of FLASH chip U2 and short circuit after ground connection, 29 of chip U2,30,31,32,41,42,43 and 44 pin respectively with 24,25,26 of chip U1,27,28,29,30 link to each other with 31 pin, 7,8,9,16,17 of chip U2 links to each other with 39 pin with 16,40,18,19,17 of chip U1 respectively with 18 pin, and 7,8,18 of chip U2 is connected with power Vcc by resistance R 15, R14, R13 and R12 respectively with 19 pin.

6, storer according to claim 1 is characterized in that: the USB slot is connected with chip U1 with R4 by resistance R 3, R2 respectively.

7, storer according to claim 1, it is characterized in that: the microprocessor chip U1 that comprises usb interface controller, chip U1 links to each other with power Vcc and ground connection, chip U1 also is connected to power Vcc by capacitor C 3, chip U1 is simultaneously by resistance R 1 and resistance R 5 difference ground connection, chip U1 also is connected with power Vcc with resistance R 11 by resistance R 10 respectively, 1 end of LED 1 links to each other with resistance R 9, its 2 end ground connection, chip U1 links to each other with 1 end of LED 1 by resistance R 9, crystal oscillator Y1 and resistance R 8 parallel connections, the two ends of crystal oscillator Y1 link to each other with the bipod of chip U1 respectively, and the two ends of crystal oscillator Y1 are respectively by capacitor C 4, C5 ground connection.