CN104810044A - Extensible USB (universal serial bus) flash disk - Google Patents
Extensible USB (universal serial bus) flash disk Download PDFInfo
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- CN104810044A CN104810044A CN201510232500.2A CN201510232500A CN104810044A CN 104810044 A CN104810044 A CN 104810044A CN 201510232500 A CN201510232500 A CN 201510232500A CN 104810044 A CN104810044 A CN 104810044A
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- usb flash
- flash drive
- control chip
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 20
- 230000001960 triggered effect Effects 0.000 claims abstract description 5
- 239000013078 crystal Substances 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Abstract
The invention discloses an extensible USB (universal serial bus) flash disk, and belongs to the field of USB flash disc design. The extensible USB flash disk comprises a main control PCB (printed circuit board), a first USB main control chip, a FLASH chip, a peripheral circuit and a USB interface, and also comprises a pressing type switch, a second USB main control chip, a cascading interface A, a cascading interface B, wherein the first USB main control chip is connected with the FLASH chip through the peripheral circuit, and when no other USB flash disk is connected, the USB interface is conducted with the first USB main control chip through the pressing type switch. When another USB flash disk is connected with USB flash disk through the cascading interfaces, the pressing type switch of the cascading interface A is triggered, the switching to the second USB main control chip is realized, and the USB interface is conducted with the second USB main control chip through the pressing type switch, so that the storage space of the other USB flash disk becomes a part of the storage space of the USB flash disk. In the practical life, the flexible combined use can be realized, the storage space is expanded, great convenience and selectivity can be brought to the data backup process of people, and the cost for changing a memory with the larger volume is saved for users.
Description
Art
The invention belongs to USB flash drive design field, be specifically related to a kind of extendible USB flash drive.
Background technology
Along with the development of computer software and hardware, the requirement of people to multimedia recreation is also more and more higher, audio-video document is along with the raising of sharpness, space shared by it is also increasing, the monofile scale of construction of the audio-visual type of a lot of amusement is increasing, and a lot of people had such experience: the USB flash disk having two low capacities on hand, has the file of an impartible large volume to need copy, a USB flash disk can not load, and file to be copied can not be divided in two USB flash disks again.Although along with technical progress, USB flash disk flash chip capacity is also improving constantly, and for user, in order to adapt to the needs of Large Copacity file, and constantly removing to eliminate relative low capacity USB flash disk on hand, can bring very large waste and inconvenience.
Summary of the invention
For the deficiency that existing method exists, the present invention proposes a kind of extendible USB flash drive.
Technical scheme of the present invention is achieved in that
A kind of extendible USB flash drive, comprising: master control pcb board, USB main control chip and a FLASH chip; Master control pcb board is integrated with crystal oscillator, Chip-R, electric capacity, voltage stabilizing IC and USB interface, and wherein crystal oscillator, Chip-R, electric capacity and LDO voltage stabilizing IC form peripheral circuit; One USB main control chip connects described FLASH chip by described peripheral circuit;
This USB flash drive also comprises push switch, the 2nd USB main control chip, A subtending port and B subtending port;
A described USB main control chip is connected with peripheral circuit further by the first pilot lamp, and described 2nd USB main control chip is connected with peripheral circuit further by the second pilot lamp;
Described first pilot lamp is used to indicate this easily extensible USB flash drive and is operated in the pattern of working independently, and described second pilot lamp is used to indicate this easily extensible USB flash drive and is operated in expansion mode of operation;
Described push switch, merge mutually with A subtending port, namely be fixedly connected with, it includes lockable mechanism, be triggered when the A subtending port of this easily extensible USB flash drive combines with the B subtending port of another easily extensible USB flash drive or is separated, to switch the mode of operation of this easily extensible USB flash drive; Described mode of operation comprises the pattern of working independently and expansion mode of operation; The described pattern of working independently refers to when accessing this easily extensible USB flash drive without other USB flash drive, the default mode of operation of this easily extensible USB flash drive, now the USB interface of this easily extensible USB flash drive is communicated with a USB main control chip by push switch, make a USB main control chip place in circuit, this easily extensible USB flash drive carries out separately the mode of operation of flash information storage; Described expansion mode of operation refers to after this easily extensible USB flash drive combined with the B subtending port of another easily extensible USB flash drive by its A subtending port, this easily extensible USB flash drive is by the switching action of push switch, USB interface is disconnected with a USB main control chip, is communicated with the 2nd USB main control chip, i.e. the 2nd USB main control chip place in circuit, is carried out the mode of operation of flash information storage jointly by these two USB flash drive;
When this USB flash drive be in work independently pattern time, described USB interface is connected with a described USB main control chip by described push switch; When this USB flash drive is in expansion mode of operation, described USB interface is connected with the 2nd USB main control chip by push switch; Described 2nd USB main control chip connects FLASH chip by peripheral circuit;
The 2nd described USB main control chip is used for storing the flash information of this USB flash drive under expansion mode of operation;
Described subtending port, be the interface that this USB flash drive uses under expansion mode of operation, wherein A subtending port is netted outlet structure, and be connected with FLASH chip with peripheral circuit, B subtending port is netted pin configuration, is connected with FLASH chip simultaneously;
A described USB main control chip and the 2nd USB main control chip store the hardware information of this USB flash drive under the pattern of working independently and the hardware information under expansion mode of operation respectively, use when carrying out hardware identification and Read-write Catrol for computing machine;
Principle of work:
One USB main control chip and the 2nd USB main control chip store the hardware information under the hardware information of this USB flash drive under the pattern of working independently and expansion mode of operation respectively, when carrying out hardware identification and Read-write Catrol for computing machine.When accessing without other USB flash disk, USB interface is connected by push switch and a USB main control chip, and this USB flash drive is defaulted as the pattern of working independently.When another USB flash disk is connected with this USB flash disk by subtending port, trigger the push switch of A subtending port, switch to the 2nd USB main control chip, USB interface is connected by push switch and the 2nd USB main control chip, the mode of operation realizing this USB flash disk of switching, to expanding mode of operation, makes the storage space of another USB flash disk become a part for this USB flash disk storage space.When needs two USB flash disks are used alone, be separated by two USB flash disks, now push switch is released, and USB flash disk recovers the pattern that works independently of acquiescence.
The invention has the beneficial effects as follows:
1., in cascade expansion use procedure, there is the flash information state after special 2nd USB main control chip process two USB flash disk combination, thus can steady operation, do not need format.
2. based on the realization of circuit, make not need extra support on software view, enable user's directly convenient use.
3., in real life, can flexible combination use, extension storage space, brings larger facility and randomness to the data backup procedure of people.
4. improve the use value of low capacity storer, for user saves the expense changing mass storage.
5. the Combined design of subtending port, push switch and lockable mechanism, easy to use, and avoid the loss that user brings because of maloperation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the extendible USB flash drive of one embodiment of the present invention;
Fig. 2 (a) is the front elevation of the extendible USB outward appearance of one embodiment of the present invention; B () is the rear view of (a); C () is the left view of (a);
Fig. 3 (a) is one embodiment of the present invention A subtending port structural representation; B () is one embodiment of the present invention B subtending port structural representation;
Fig. 4 is the pin numbering schematic diagram of one embodiment of the present invention A subtending port;
Fig. 5 is the annexation schematic diagram that the extendible USB of one embodiment of the present invention is in when expanding mode of operation;
Fig. 6 (a) is the structural representation on the downside of one embodiment of the present invention A subtending port and between push switch; B () is the vertical view of (a);
Wherein, 1-USB interface; 2-the one USB main control chip; 3-first pilot lamp; 4-push switch; 5-peripheral circuit; 6-the 2nd USB main control chip; 7-second pilot lamp; 8-FLASH chip; 9-B subtending port; 10-A subtending port; 11-buffer stopper; 12-button; 13-A subtending port L part; 14-A subtending port R-portion.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The extendible USB flash drive of present embodiment, as shown in Figure 1, comprising: master control pcb board, 2, USB master control core and a FLASH chip 8; Master control pcb board is integrated with crystal oscillator, Chip-R, electric capacity, voltage stabilizing IC, the first pilot lamp 3, second pilot lamp 7 and usb 1, and wherein crystal oscillator, Chip-R, electric capacity and voltage stabilizing IC form peripheral circuit 5; One USB main control chip 2 connects described FLASH chip 8 by described peripheral circuit 5; First pilot lamp 3 of present embodiment and the second pilot lamp 7 are LED light; The FLASH chip 8 of present embodiment is made up of 2 IntelJS29F16B08CCME1 chips (25NM 16GB MLC), altogether 32G, in order to realize the storage of data.
This USB flash drive also comprises push switch 4, the 2nd USB main control chip 6, A subtending port 10 and B subtending port 9 as shown in Figure 1;
Master control pcb board can realize the concrete read-write operation to flash memory, the master control pcb board of present embodiment is undertaken transforming obtaining by selecting silver-colored bright IS902E master control double applying plate, during transformation, place in circuit is switched in order to realize realizing two USB main control chips (i.e. a USB main control chip and the 2nd USB main control chip) by single-pole double-throw switch (SPDT), by USB main control chip integrated on bright for silver IS902E master control double applying plate, an i.e. USB main control chip, first remove, to access push switch, one USB main control chip, 2nd USB main control chip and two LED light being used to refer to easily extensible USB flash drive mode of operation, USB3.0 agreement supported by the bright IS902E master control double applying plate of silver, ensure that transmission speed.For the ease of compatibility, what the 2nd USB main control chip adopted is the USB main control chip of the bright IS902E master control double applying plate same model with silver.
A USB main control chip of present embodiment is connected with peripheral circuit further by the first pilot lamp as shown in Figure 1, and the 2nd USB main control chip is connected with peripheral circuit further by the second pilot lamp;
First pilot lamp of present embodiment is blue, and be used to indicate a USB main control chip place in circuit, this easily extensible USB flash drive is operated in the pattern of working independently; Second pilot lamp of present embodiment is yellow, and be used to indicate the 2nd USB main control chip place in circuit, this easily extensible USB flash drive is operated in expansion mode of operation;
When the USB flash drive of present embodiment be in work independently pattern time, described USB interface is connected with a described USB main control chip by described push switch; When this USB flash drive is in expansion mode of operation, described USB interface is connected with the 2nd USB main control chip by push switch; Described 2nd USB main control chip connects FLASH chip by peripheral circuit;
2nd USB main control chip of present embodiment is used for storing the flash information of this USB flash drive under expansion mode of operation;
The subtending port of present embodiment is the interface that this USB flash drive uses under expansion mode of operation, selects 5*840pin to make interface by oneself, for by external for the pin of FLASH chip, fixes on the downside of A subtending port with push switch.The outside drawing that Fig. 2 (a), (b) and (c) are this USB flash drive, A subtending port and B subtending port are placed in the tow sides of this USB flash memory disk body respectively, and the first pilot lamp and the second pilot lamp are placed in the lower end of this USB flash memory disk body.
A subtending port such as Fig. 3 (a) of present embodiment is depicted as mesh grille outlet structure, and be connected with FLASH chip with peripheral circuit, B subtending port is netted pin configuration as Fig. 3 (b) is depicted as, and is connected with FLASH chip simultaneously; A subtending port and B subtending port are all be made up of two duplicate subdivisions, present embodiment all defines the A subtending port shown in Fig. 3 and B subtending port left-half interface is separately L part, right-hand part part interface is R-portion, and L part and R-portion are connected respectively the 2 JS29F16B08CCME1 chips forming FLASH chip.
Present embodiment is for the L part 13 of A subtending port, the pin function of subtending port is illustrated, as shown in Figure 4, the pin of the L part of present embodiment A subtending port is numbered 1,2,3,4,5,6,7,8,9,0, A, B, C, D, E, F, G, H, I, J, its each self-corresponding function is respectively:
RB: read busy, Low level effective;
RE: read enable, Low level effective;
CE: chip is chosen enable, Low level effective;
VCC:3.3V power supply;
Vss: ground;
CLE: command word input is enable;
ALE: address input is enable;
WE: write enable input, Low level effective;
WP: write-protect inputs, Low level effective;
D0-D7:8 bit data I/O port;
H, I, J's is pin for subsequent use;
The pin numbering of A subtending port R-portion 14 is numbered identical with the pin of A subtending port L part 13; A subtending port is corresponding with the pin of B subtending port.
Different in A subtending port and the online sequence of B subtending port.B subtending port line sequence is identical with FLASH chip line sequence, No. nine that do not draw FLASH chip in A subtending port line sequence, No. ten pins, and ten of FLASH chip No. four, ten No. five pins is guided respectively into No. nine of A subtending port, No. ten interface pin.Because containing the identical JS29F16B08CCME1 chip of two panels in each USB flash disk, so subtending port is also corresponding respectively by two duplicate subdivisions.
One USB main control chip of present embodiment and the 2nd USB main control chip store the hardware information of this USB flash drive under the pattern of working independently and the hardware information under expansion mode of operation respectively, use when carrying out hardware identification and Read-write Catrol for computing machine;
As shown in Figure 5, easily extensible USB flash drive in present embodiment is when carrying out expansion and using, A subtending port and B subtending port interface are used for being interconnected, during application, the A subtending port of first USB flash disk is by connecting the B subtending port of second USB flash disk, make the FLASH chip of second USB flash disk be connected to first USB flash disk governor circuit on.Now the available storage of first USB flash disk is the memory capacity sum of first, second two USB flash disks.
The push switch of present embodiment is single-pole double-throw switch (SPDT), merge mutually with A subtending port, include lockable mechanism, be triggered when the A subtending port of this easily extensible USB flash drive combines with the B subtending port of another easily extensible USB flash drive or is separated, to switch a USB main control chip in this USB flash drive and the 2nd USB main control chip, namely switch the pattern that works independently and the expansion mode of operation of this easily extensible USB flash drive; When the described pattern of working independently refers to and accesses without other USB flash drive, this easily extensible USB flash drive carries out separately the mode of operation of flash information storage; Described expansion mode of operation refers to after this easily extensible USB flash drive combined with the B subtending port of another easily extensible USB flash drive by its A subtending port, is jointly carried out the mode of operation of main flash information storage by these two USB flash drive; The specific works principle of the push switch of present embodiment is that push switch the pressing when its A subtending port is accessed by the B subtending port of second USB flash disk of first USB flash disk is triggered, then first USB flash disk the 2nd USB main control chip place in circuit, now first USB flash disk mode of operation for expansion mode of operation; When disconnecting second USB flash disk, need again press, mode of operation, by pressing and trigger again, is switched back the pattern that works independently given tacit consent to by push switch.During application, after USB interface access computing machine, by checking the LED light of respective color, distinguishing the mode of operation of USB flash disk, if it is glittering to see blue color LED light, then illustrating that now USB flash disk is operated in the pattern of working independently; If it is glittering to see yellow color LED light, then illustrate that now USB flash disk is operated in expansion mode of operation.
For strengthening the reliability of connected USB flash disk entirety, present embodiment specialized designs lockable mechanism, as shown in Fig. 6 (a) He (b), is provided with the column of four vertical joint planes in the corner of A subtending port, column is tube-in-tube structure, inside has spring supporting.Sleeve parcel lower end, upper end column, there is decussate texture on column top, lower end, and this decussate texture embeds in the screw thread of upper end sleeve lining.In stroke between push switch two states, upper end sleeve have under the impact of screw thread and lower end column 90 ° revolve distance, the barb structure parallel with A subtending port side is originally screwed out, in the groove of embedding B subtending port, carries out locking.
Claims (4)
1. an extendible USB flash drive, comprising: master control pcb board, USB main control chip and a FLASH chip; Master control pcb board is integrated with crystal oscillator, Chip-R, electric capacity, LDO voltage stabilizing IC and USB interface, and wherein crystal oscillator, Chip-R, electric capacity and LDO voltage stabilizing IC form peripheral circuit; One USB main control chip connects described FLASH chip by described peripheral circuit;
It is characterized in that: this USB flash drive also comprises push switch, the 2nd USB main control chip, A subtending port and B subtending port;
Described push switch, merges mutually with A subtending port and is connected, and is triggered when the A subtending port of this easily extensible USB flash drive combines with the B subtending port of another easily extensible USB flash drive or is separated, to switch the mode of operation of this easily extensible USB flash drive;
Described mode of operation comprises the pattern of working independently and expansion mode of operation;
The described pattern of working independently refers to the default mode of operation when accessing without other USB flash drive, now the USB interface of this easily extensible USB flash drive is communicated with a USB main control chip by push switch, an i.e. USB main control chip place in circuit, this easily extensible USB flash drive carries out separately the mode of operation of flash information storage;
Described expansion mode of operation refers to when this easily extensible USB flash drive is combined with the B subtending port of another easily extensible USB flash drive by its A subtending port, this easily extensible USB flash drive is by the switching action of push switch, USB interface is made to disconnect with a USB main control chip and be communicated with the 2nd USB main control chip, i.e. the 2nd USB main control chip place in circuit, is carried out the mode of operation of flash information storage jointly by these two USB flash drive;
Described 2nd USB main control chip is used for storing the flash information of this USB flash drive under expansion mode of operation, and it connects FLASH chip by peripheral circuit;
Described subtending port, be the interface that this USB flash drive uses under expansion mode of operation, wherein A subtending port is connected with FLASH chip with peripheral circuit simultaneously, and B subtending port is connected with FLASH chip.
2. extendible USB flash drive according to claim 1, is characterized in that: a described USB main control chip is connected with peripheral circuit further by the first pilot lamp; Described 2nd USB main control chip is connected with peripheral circuit further by the second pilot lamp;
Described first pilot lamp is used to indicate this easily extensible USB flash drive and is operated in the pattern of working independently; Described second pilot lamp is used to indicate this easily extensible USB flash drive and is operated in expansion mode of operation.
3. extendible USB flash drive according to claim 1, is characterized in that: described push switch includes lockable mechanism.
4. extendible USB flash drive according to claim 1, is characterized in that: described A subtending port is netted outlet structure; Described B subtending port is netted pin configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510232500.2A CN104810044B (en) | 2015-05-07 | 2015-05-07 | A kind of expansible USB flash drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510232500.2A CN104810044B (en) | 2015-05-07 | 2015-05-07 | A kind of expansible USB flash drive |
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| Publication Number | Publication Date |
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| CN104810044A true CN104810044A (en) | 2015-07-29 |
| CN104810044B CN104810044B (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510232500.2A Expired - Fee Related CN104810044B (en) | 2015-05-07 | 2015-05-07 | A kind of expansible USB flash drive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108875886A (en) * | 2018-09-03 | 2018-11-23 | 艾尔攀·也尔肯江 | A kind of double subregion USB flash disks |
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| CN104036809A (en) * | 2014-06-26 | 2014-09-10 | 无锡市崇安区科技创业服务中心 | Extendable mobile hard disk |
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2015
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| CN104810044B (en) | 2017-06-13 |
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