CN1786931A - Apparatus and method for access of fast flash memory cord - Google Patents
Apparatus and method for access of fast flash memory cord Download PDFInfo
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- CN1786931A CN1786931A CN 200510119207 CN200510119207A CN1786931A CN 1786931 A CN1786931 A CN 1786931A CN 200510119207 CN200510119207 CN 200510119207 CN 200510119207 A CN200510119207 A CN 200510119207A CN 1786931 A CN1786931 A CN 1786931A
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Abstract
The invention discloses a multiple card-in-one flash memory card accessing device, able to effectively reduce the number of the needed transmission leads by making signal pins of multiple flash memory card sockets share transmission leads, then reducing the manufacturing cost and convenient to access multiple memory cards connected. The flash memory card accessing device comprises: a flash memory card interface with multiple flash memory card sockets, each of which has multiple signal pins; a control component for detecting and judging the type of an inserted flash memory card and controlling the flash memory card sockets; and multiple signal leads for connecting multiple signal pins of the flash memory card sockets with the control component, where corresponding signal pins in the flash memory card sockets are interconnected in parallel to connect through a signal lead to the control component.
Description
Technical field
The relevant a kind of flash card of the present invention, particularly a kind of have a plurality of slots, can connect the flash card of a plurality of dissimilar flash memory cards.
Background technology
Flash memory (Flash memory) has and can directly change data with electric current and the storable characteristic of data behind power-off.In recent years, along with wireless mobile multimedia information universalness gradually, many emerging products such as digital camera, PDA, mobile phone, MP3 playing device etc., need just in time as flash memory cards, to have that volume is little, capacity big, read-write fast, the portable storer of power saving, advantage such as shatter-proof.Flash memory cards is with other portable storage mediums, compare as disk and CD, because the capacity of disk (as 1.44MB) is too little, volume reaches easy damage too greatly, and CD (machine) is shock-sensitive also than power consumption, so flash memory cards becomes the main product of portable memory storage gradually.
But, the flash memory cards specification and the disunity of Xiao Shouing in the market, generally speaking can roughly divide into following five kinds: CF card (Compact Flash Card), SM card (Smart Media Card), SD card (SecureDigital Card), mmc card (Multi Media Card) and MS card (Memory Stick), the flash memory cards of all size all has world-class large manufacturer to take the lead to organize association to produce, so each have their own support member of manufacturer, each specification also all reaches certain scale and does not give in mutually at present, within the short-term is to be not easy to integrate standardized situation.Reading aspect the flash memory cards, the memory card technologies that support single specification is not so difficult, but for satisfying the demand of all size, must develop the access device of multi-use card, to integrate and to read the flash memory cards of different size specifications and pin number.
The access device of existing flash memory cards has a plurality of flash memory card insert slot 1002,1004 as shown in Figure 1 on the flash card 100 ... 100n is with corresponding flash memory cards more than two types.Each flash memory card insert slot is corresponding to one type flash memory cards, and (for example flash memory card insert slot 1002 comprises a plurality of pin position CD1, E1, X11 all to comprise a plurality of pin position ... X1n), each pin position is connected with Control Component 120 by a transfer wire 110 respectively.Control Component 120 can be judged which slot has inserted flash memory cards, and control the access of the flash memory cards data on this slot by the signal on each bar transfer wire 110 of reception/detection.For instance, if the voltage that Control Component 12 detects CD1 pin position transfers low level to when (transferring logical zero to by logical one) by a high position, then Control Component 120 assert that promptly flash memory card insert slot 1002 inserted flash memory cards.Utilize above method, Control Component 120 is detected the quantity of insertion of slot that flash memory cards inserts, flash memory cards and the type of judging the flash memory cards that inserts.
Yet, above-mentioned existing flash memory cards access device has a shortcoming: the number of the flash memory card insert slot that is comprised when flash card 100 more for a long time, the number of transfer wire 110 that is connected to Control Component 120 is also along with increase, and then can improve required manufacturing cost, relatively, transfer wire 110 also can take the required area of circuit board.
Summary of the invention
One of purpose of the present invention promptly is to disclose a kind of flash memory cards access device of multi-use card, the insertion that can detect flash memory cards whether, with quantity, the type of flash memory cards.And more particularly, the employed transfer wire of flash memory cards access device, particularly signal conductor that the present invention proposes do not increase along with the number of flash memory card insert slot, thereby can reduce manufacturing cost.
Another object of the present invention then is to disclose a kind of flash memory cards access device of the present invention that is applied to, and detects flash memory cards and whether inserts, judges the method for inserting the flash Card Type.
According to above-mentioned, flash memory cards access device of the present invention comprises: a flash card, comprise a plurality of flash memory card insert slot, and each flash memory card insert slot all has a plurality of signal pins; One Control Component is judged the flash Card Type that inserts in order to detect, and control access flash storage card slot; And many signal conductor, being electrically connected in order to a plurality of signal pins and Control Component a plurality of flash memory card insert slot, corresponding signal pin connects a signal conductor respectively in wherein a plurality of flash memory card insert slot after parallel connection.Wherein, many signal conductor can be data buss, and each flash memory card insert slot also can comprise detection pin position and enable the pin position, and Control Component judges whether to insert flash memory cards by detecting the pin position, and controls the flash memory card insert slot that allows access by enabling the pin position.
Description of drawings
Fig. 1 is the flash memory cards access device of prior art;
Fig. 2 A is the Organization Chart of the flash memory cards access device of a preferred embodiment of the present invention;
Fig. 2 B is the Organization Chart of the flash memory cards access device of another preferred embodiment of the present invention;
Fig. 3 is the flash memory cards access device of another embodiment of the present invention; And
The figure of Fig. 4 expresses another embodiment of the present invention, the annexation between its each slot pin position.
Embodiment
Embodiments of the present invention can be described in detail as follows.Yet except the content of describing in detail, the present invention can also modify through equivalence and change and carry out at other embodiment widely, and it is as the criterion with appended claim scope.
With reference to figure 2A, the Organization Chart that it illustrates the flash memory cards access device of a preferred embodiment of the present invention mainly comprises a flash card 200 and a Control Component 220.Have on the flash card 200 a plurality of flash memory card insert slot 201,202 ..., 20n, can corresponding two or more flash memory cards.Each flash memory card insert slot is corresponding to one type flash memory cards, and each flash memory card insert slot has a plurality of pin position respectively.Among this embodiment, a plurality of pin position of each flash memory card insert slot also can be divided into and detect the pin position, enable pin position and signal pin.Wherein detect the pin position and be used for judging flash memory card insert slot whether insert flash memory cards (as CD1, CD2 ..., CDn), enable the pin position and be with decide a flash memory card insert slot whether enable (enable) (as E1, E2 ..., En), signal pin then is used for transmission signals (as X11 ~ X1n, X21 ~ X2n ... Deng).Each detect the pin position (be CD1, CD2 ..., CDn) detect lead 210 by one respectively and be connected to Control Component 220, respectively enable the pin position (be E1, E2 ..., En) be connected to Control Component 220 by an enable conductor 212 respectively.And be that unlike the prior art corresponding each signal pin elder generation parallel connection in flash card 200 of each slot then just is connected to Control Component 220, for example among Fig. 2 A, signal pin X11, X21 ..., Xn1 is connected to Control Component 220 with same signal conductor 214 again prior to after joining in the flash card 200.In other words, each signal conductor 214 connects the corresponding a plurality of signal pins of each flash memory card insert slot in the mode of one-to-many.One preferred embodiment of above-mentioned many signal conductor 214 i.e. a data bus (data bus).
In another embodiment, Fig. 2 B for example, the corresponding signal pin of each flash memory card insert slot can be pulled out a lead respectively, and is connected to Control Component 220 with signal conductor 214 respectively again after 200 loong shunts of flash card.
How below will describe above-mentioned flash memory cards access device operates.With reference to figure 3, suppose that flash memory card insert slot 201 is a CF card slot, and only insert a CF card at present.Control Component 220 detects and respectively detects the pin position (signal of CD1 ~ CDn) changes (for example CD1 pin position signal is by high-order step-down position), and learn it is that flash memory card insert slot 201 is inserted flash memory cards at present, then can to judge be to insert a CF card to Control Component 220 at this moment.Control Component 220 enables flash memory card insert slot 201 by enable conductor 2012 afterwards, carries out the access of data.
In another embodiment, suppose that flash memory card insert slot 201 is a CF card slot, and flash memory card insert slot 202 is a SM card slot, and inserts a CF card and a SM card at present.Control Component 220 detects and respectively detects the pin position (signal of CD1 ~ CDn) changes that (for example CD1 pin position signal is by high-order step-down position, CD2 pin position signal is by high-order step-down position), and learn it is that flash memory card insert slot 201 and 202 is inserted flash memory cards at present, then can to judge be to insert a CF card and a SM card to Control Component 220 at this moment.Access device will send an information warning to the user this moment, notify the user to select a flash memory cards to use, and another flash memory cards is pulled out.Then, Control Component 220 enables flash memory card insert slot 201 or 202 by enable conductor 2012 or 2013, carries out the access of data.In other words, the signal conductor that the present invention is shared, what only enable a flash memory cards in the same time enables the pin position, can avoid the confusion of transmission signals.And if insert simultaneously under the situation of a plurality of flash memory cards, by optionally enabling specific flash memory card insert slot, can the different flash memory cards of switch access.
With reference to figure 4, it shows each pin position of five kinds of flash memory cards, and detects the connection relationship between lead, enable conductor and signal conductor, and wherein, SD, MMC, MS card slot have identical pin position configuration, so include it in same hurdle.With reference to the allocation list of Fig. 4, wherein being numbered 1 detection lead SMCD_ is the detection lead of SM card; Being numbered 2 detection lead SDCD is the detection lead of mmc card; Be numbered the detection lead that 21 and 24 detection lead CFCD1_ and CFCD0_ are the CF card; Being numbered 19 detection lead MSINS is the detection lead of MS card; Being numbered 6 detection lead SDD3_CD is the detection lead of SD card, and itself and CF card signal CFDA0 and SM card signal SDM2 are shared; And the SDD1 pin position of SD/MMC/MS card slot after the SMD4 pin position of the CFD2 pin position of CF card, SM card is in parallel, sharedly is numbered 3 signal conductor and is connected to Control Component 220; The CFDA2 pin position of CF card is in parallel with the SMD1 card of SM card, and shared 8 signal conductor and the Control Component 220 of being numbered joins.All the other each pin positions see also Fig. 4, and the rest may be inferred.In other words, (small part is as being numbered 1,2,12 with one-to-many manner for each signal conductor ... only connect a pin position Deng signal conductor), be connected to the signal specific pin position of each flash memory card insert slot.
The estimate of situation of five kinds of flash memory cards of present embodiment is as follows:
1. become electronegative potential (promptly number 21 and 24 detection lead) as pin position CFCD0_ and pin position CFCD1_, be judged as the insertion of CF card.
2. work as pin position SMCD_ and become electronegative potential (the detection lead of numbering 1), be judged as the SM card and insert.
3. become electronegative potential (the detection lead of numbering 6 or 2) when pin position SDD3_CD becomes noble potential or pin position SDCD, be judged as the SD card and insert.
4. work as pin position SDCD and become electronegative potential (the detection lead of numbering 2), be judged as mmc card and insert.
5. work as pin position MSINS and become electronegative potential (the detection lead of numbering 19), be judged as the MS card and insert.
For instance, insert a flash memory cards now.The voltage that Control Component 220 detects the 21st and 24 signal conductor (CFCD0_ and CFCD1_ pin position) becomes electronegative potential, and judge promptly that the flash memory cards that inserts is the CF card this moment.Signal by above-mentioned specific pin position changes, and can detect and judge the type of the flash memory cards of present insertion.And behind the flash memory cards that judge to insert, the flash memory card insert slot by not enabling other enable pin, even if insert other flash memory cards more this moment, can not influence the signal of each pin position of Control Component 220 accesses yet.
Among the last embodiment, the same time of flash memory cards access device only allows the accessing flash storage card.If with above-mentioned mentioned example is example, judge and insert a CF card when Control Component 220 becomes electronegative potential according to the voltage of the 21st and 24 signal conductor, if also detect and be numbered its voltage of signal conductor (SMCD_ pin position) of 1 and become low level, a CF card and a SM card are inserted in representative at present simultaneously afterwards.Access device will send an information warning to the user this moment, notify the user to select a flash memory cards to use, and another flash memory cards is pulled out.Then, access device comes access data with the corresponding handling procedure of selecting of flash memory cards (CF or SM card).
Comprehensively above-mentioned, the invention provides a kind of access device of flash memory cards of multi-use card.Because the signal conductor between Control Component and the flash card does not increase with the flash memory card insert slot number, therefore can reduce manufacturing cost, and on the other hand, the area that transmission line takies also can dwindle effectively.
The above is preferred embodiment of the present invention only, is not in order to limit the claim of this creation; Simultaneously above description should be understood and be implemented for the special personage who knows the present technique field, so other do not break away from equivalence change or the modification of being finished under the spirit that this creation discloses, and all should be included in the appended claim scope.
Claims (10)
1. flash memory cards access device comprises:
One flash card comprises a plurality of flash memory card insert slot, and each described flash memory card insert slot has a plurality of signal pins;
One Control Component is judged the flash Card Type that inserts in order to detect, and controls the signal access of described a plurality of flash memory card insert slot; And
Many signal conductor, be electrically connected in order to described a plurality of signal pins and described Control Component with described a plurality of flash memory card insert slot, corresponding described signal pin connects a described signal conductor respectively in wherein said a plurality of flash memory card insert slot after parallel connection.
2. flash memory cards access device as claimed in claim 1 is characterized in that, described many signal conductor are a bus.
3. flash memory cards access device as claimed in claim 1 is characterized in that, described a plurality of flash memory card insert slot are corresponding to following one or the flash memory cards of its combination: CF card, SM card, SD card, mmc card or MS card.
4. flash memory cards access device as claimed in claim 1, it is characterized in that, each described flash memory card insert slot also comprises a detection pin position and is electrically connected with a detection lead and described Control Component, and the signal that described Control Component detects the described detection pin position of each described flash memory cards changes to judge whether a described flash memory card insert slot inserts a flash memory cards.
5. flash memory cards access device as claimed in claim 1, it is characterized in that, each described flash memory card insert slot also comprises one and enables the pin position and be electrically connected with an enable conductor and described Control Component, and described Control Component allows the described flash memory card insert slot of access by the described pin position of selecting to enable a described flash memory cards that enables.
6. flash memory cards access device as claimed in claim 1, it is characterized in that, each described flash memory card insert slot also comprises one and enables the pin position and be electrically connected with an enable conductor and described Control Component, and the described a plurality of flash memory card insert slot of described Control Component by not enabling other are to allow access one described flash memory card insert slot.
7. flash memory cards access device as claimed in claim 1 is characterized in that, corresponding described signal pin is in parallel outside the described flash card or in parallel in described flash card in described a plurality of flash memory card insert slot.
8. the access method of a flash memory cards access device, wherein said flash memory cards access device has a plurality of flash memory card insert slot and many signal conductor, corresponding signal pin connects a described signal conductor after with the parallel connection of many-one mode and is electrically connected with a Control Component in described a plurality of flash memory card insert slot, each described flash memory card insert slot also has a detection pin position respectively and is electrically connected with a detection lead and described Control Component, and the access method of described flash memory cards access device comprises:
In inserting a flash memory cards, the signal that described Control Component detects each described detection lead changes;
Signal according to each described detection lead changes, and judges described flash memory card insert slot and described flash Card Type that described flash memory cards inserts; And
Carry out the flash memory cards program of corresponding described flash Card Type.
9. the access method of flash memory cards access device as claimed in claim 8, it is characterized in that, also comprise when inserting plural flash memory cards, send the described flash memory cards that an information warning notifies the user to select to keep a described flash memory cards and pull out other.
10. the access method of flash memory cards access device as claimed in claim 8, it is characterized in that, each described flash memory card insert slot also comprises one and enables the pin position, and described enable described the enable pin position of pin position and the described a plurality of flash memory card insert slot that do not enable other of described Control Component by selecting to enable a described flash memory card insert slot is with control access one described flash memory card insert slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101192071A CN100461139C (en) | 2005-10-26 | 2005-10-26 | Apparatus and method for access of fast flash memory cord |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101192071A CN100461139C (en) | 2005-10-26 | 2005-10-26 | Apparatus and method for access of fast flash memory cord |
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| Publication Number | Publication Date |
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| CN1786931A true CN1786931A (en) | 2006-06-14 |
| CN100461139C CN100461139C (en) | 2009-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101192071A Active CN100461139C (en) | 2005-10-26 | 2005-10-26 | Apparatus and method for access of fast flash memory cord |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699422B (en) * | 2009-09-30 | 2012-04-25 | 曙光信息产业(北京)有限公司 | Device for carrying out data transmission with terminal |
| CN102664037A (en) * | 2012-03-23 | 2012-09-12 | 广东远峰电子科技有限公司 | Control circuit for TF or SD card |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU687312B2 (en) * | 1995-05-09 | 1998-02-19 | Smartmove (Nz) Limited | Card interface |
| US6438638B1 (en) * | 2000-07-06 | 2002-08-20 | Onspec Electronic, Inc. | Flashtoaster for reading several types of flash-memory cards with or without a PC |
| CN2563871Y (en) * | 2002-09-23 | 2003-07-30 | 彭振华 | Single set multiple card intercommunication device for mobile phone |
| CN100334569C (en) * | 2002-09-24 | 2007-08-29 | 联想(北京)有限公司 | Memory card identification method and marking equipment |
| TW200506733A (en) * | 2003-08-15 | 2005-02-16 | Via Tech Inc | Apparatus and method for the co-simulation of CPU and DUT modules |
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2005
- 2005-10-26 CN CNB2005101192071A patent/CN100461139C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699422B (en) * | 2009-09-30 | 2012-04-25 | 曙光信息产业(北京)有限公司 | Device for carrying out data transmission with terminal |
| CN102664037A (en) * | 2012-03-23 | 2012-09-12 | 广东远峰电子科技有限公司 | Control circuit for TF or SD card |
| CN102664037B (en) * | 2012-03-23 | 2015-04-22 | 东莞市远峰科技有限公司 | Control circuit for TF or SD card |
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| Publication number | Publication date |
|---|---|
| CN100461139C (en) | 2009-02-11 |
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