CN101266642A - Unit card reader control chip and its method for checking interference - Google Patents
Unit card reader control chip and its method for checking interference Download PDFInfo
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- CN101266642A CN101266642A CNA2007100886972A CN200710088697A CN101266642A CN 101266642 A CN101266642 A CN 101266642A CN A2007100886972 A CNA2007100886972 A CN A2007100886972A CN 200710088697 A CN200710088697 A CN 200710088697A CN 101266642 A CN101266642 A CN 101266642A
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Abstract
The invention relates to a card reader control chip which provides at least one memory card detecting pin to detect the memory card on a read-write interface, so as to prevent a situation that the memory cards disturb each other caused by a plurality of memory card interfaces sharing the pins of the card reader control chip. When reading and writing a memory card, the card reader control chip can detect if another memory card inserts or draws out from the read-write interface of the memory card via the memory card detecting pin; and when another memory card inserts or draws out, disturbance announcing signals are generated to prevent that data read-write of the memory card generates errors. The invention can effectively detect if the disturbance is generated in advance, so as to process appropriate debug or disturbing processing mechanism and avoid that the card reader control chips sharing the pin only can simultaneously arrange one memory card.
Description
Technical field
The present invention relates to a kind of unit card reader control chip, but pin-sharing unit card reader control chip and the method thereof disturbed between particularly a kind of detection of stored card.
Background technology
Tradition All-in-One card reader device is mostly used more simple design, and wherein a kind of read-write interface with each storage card separates separately, not the pin position of shared unit card reader control chip.Another kind of for allowing the shared unit card reader control chip pin of the read-write interface position of multiple storage card, select for use the less encapsulation of pin number order to save cost simultaneously, but must limit the same time and only can insert the action that a storage card is done access data, in the design of pin-sharing, cause the baulk of data damage or access data because interfere with each other to avoid different storing card.
Figure 1 shows that the All-in-One unit card reader control chip pin synoptic diagram of independent pin position, All-in-One unit card reader control chip 1 couples Compact Flash (CF) card/Micro Drive (MD) card read-write interface 11 with independent pin position, Smart Media (SM)/xD Picture Card (xD) blocks read-write interface 12, SecureDigital (SD) card/Multi Media Card (MMC) read-write interface 13, and Memory Stick (MS) card/Memory Stick Pro (MS-Pro) card read-write interface 14, because all support the read-write interface of storage cards all not use the pin position of identical unit card reader control chip 1, so the problem that interferes with each other that does not have pin-sharing and produced.Above-mentioned coupling mode is typical unit card reader control chip pin position coupling method, but such design must use the more encapsulation of pin number order to cooperate, so expensive on packaging cost.
Then see also Fig. 2, this figure is the All-in-One unit card reader control chip pin synoptic diagram of pin-sharing, CF card/Micro Drive card read-write interface 21, SM card/xD Picture Card card read-write interface 22, SD card/mmc card read-write interface 23, and the pin position of MS card/MS-Pro card read-write interface 24 shared unit card reader control chips 2, and the mode of its pin-sharing has various combination and method feasible, its basic goal is to save packaging cost, but because of conventional art can't solve between the storage card because the problem that interferes with each other that pin-sharing produces, only can insert wherein the action that a storage card carries out access so have to be limited in same time point, or use All-in-One deck (socket), utilize the mechanism of deck to limit the user and can only insert a storage card simultaneously.
Otherwise if when mismatching above-mentioned restriction, then when unit card reader control chip 2 just when a certain storage card read-write interface is read and write first storage card, second storage card is inserted or extracts another storage card read-write interface, and wherein read and write the pin position of the shared each other unit card reader control chip 2 of read-write interface of first storage card and second storage card, so will be because of the relation of pin-sharing, cause unit card reader control chip 2 to be subjected to the damage that can not expect in the data of read-write first storage card, whole read-write motion also might be failed.
So, though the design of card reader device as shown in Figure 2 can be saved packaging cost, and because still can support the storage card of all kinds, so still can be known as so-called All-in-One storage card reader device, but shortcoming is once to use a storage card, and many cards use or the interior data of mutual reading and writing memory card simultaneously.
Summary of the invention
In view of this, the present invention will provide a kind of unit card reader control chip, allow the pin position that different storage card read-write interface can shared unit card reader control chip, and reach the saving packaging cost; And can detect in advance between the storage card because of interfering with each other that the pin position of the shared unit card reader control chip of storage card read-write interface is caused, so can before interfering with each other, provide execution suitable notice earlier in response to measure.
For reaching above-mentioned purpose, the invention provides a kind of unit card reader control chip, wherein the pin of this unit card reader control chip is shared for a plurality of storage card read-write interfaces, wherein, this unit card reader control chip comprises a plurality of detection pins, couple a pin of described a plurality of storage card read-write interfaces respectively, described a plurality of pins that described a plurality of detection pins are coupled are respectively the pin that touches storage card in described a plurality of storage card read-write interface at first; Whether wherein, this unit card reader control chip utilizes described a plurality of detection pin to detect has storage card to insert described a plurality of storage card read-write interface.
In the above-mentioned unit card reader control chip, described a plurality of first detects described a plurality of pins that pin coupled, and can be the pin of the Vss pin position of contact storage card in described a plurality of storage card read-write interface.
In the above-mentioned unit card reader control chip, can further comprise: a plurality of second detects pin, couple a pin of described a plurality of storage card read-write interfaces respectively, described a plurality of second detection described a plurality of pins that pin coupled are individually for touching the pin of storage card at last in described a plurality of storage card read-write interfaces; Whether wherein, this unit card reader control chip utilizes described a plurality of second detection pin to detect has storage card to extract described a plurality of storage card read-write interface.
In the above-mentioned unit card reader control chip, described a plurality of second detects described a plurality of pins that pin coupled can be the pin that the card that contacts storage card in described a plurality of storage card read-write interface detects the pin position.
The present invention also provides a kind of unit card reader control chip to detect the method for disturbing, wherein the pin of this unit card reader control chip is shared for a plurality of storage card read-write interfaces, wherein, the step that detects interference is included in provides at least one to detect pin on this unit card reader control chip, whether insert described a plurality of storage card read-write interface in one of them with the detection of stored card, wherein this detection pin couples one of them the pin that touches this storage card at first of described a plurality of storage card read-write interface; One of them that follow when described a plurality of storage card read-write interfaces has a storage card when transmitting data, if this unit card reader control chip by this detections pin detected another storage card insert described a plurality of storage card read-write interface one of them, then produce the interference notification signal.
Above-mentioned unit card reader control chip detects in the method for disturbing, and this first detection this pin that pin coupled can be the pin of the Vss pin position of this storage card read-write interface contact storage card.
Above-mentioned unit card reader control chip detects in the method for disturbing, also can comprise the following steps: on this unit card reader control chip, to provide at least one second detection pin, whether extract in one of them in described a plurality of storage card read-write interfaces with the detection of stored card, wherein this second detects pin and couples one of them the pin that touches this storage card at last of described a plurality of storage card read-write interface.
Above-mentioned unit card reader control chip detects in the method for disturbing, also can comprise the following steps: when described a plurality of storage card read-write interfaces when an existing storage card is in the transmission data in one of them, if this unit card reader control chip second detects pin and detected another storage card and extract in one of them at described a plurality of storage card read-write interfaces by this, then produce second and disturb notification signal.
Above-mentioned unit card reader control chip detects in the method for disturbing, and the card that this second detection this pin that pin coupled can be the contact storage card of this storage card read-write interface detects the pin of pin position.
Above-mentioned unit card reader control chip detects in the method for disturbing, also can comprise the following steps: first to disturb notification signal and this second to disturb notification signal after one of them when this unit card reader control chip produces this, then this unit card reader control chip stops to read and write this storage card.
Above-mentioned unit card reader control chip detects in the method for disturbing, and also can comprise the following steps: to carry out the program of reading and writing described a plurality of storage cards again by the main frame that is coupled to this unit card reader control chip.
So by unit card reader control chip of the present invention and interference detection method thereof, can detect the generation of interference effectively in advance, and then can make suitable debug or Interaction Handler system earlier, and the unit card reader control chip of release pin-sharing only can be provided with the restriction of a storage card simultaneously.
Reach technology, means and the effect that predetermined purpose is taked in order further to understand the present invention, see also following about detailed description of the present invention and accompanying drawing, believe purpose of the present invention, feature and characteristics, when can going deep into thus and concrete understanding, yet accompanying drawing is only for reference and explanation usefulness, is not to be used for the present invention is limited.
Description of drawings
Fig. 1 is the All-in-One unit card reader control chip pin synoptic diagram of independent pin position;
Fig. 2 is the All-in-One unit card reader control chip pin synoptic diagram of pin-sharing;
Fig. 3 detects pin position synoptic diagram for the unit card reader control chip card;
Fig. 4 is the synoptic diagram of example for the reference deck with xD-Picture;
Fig. 5 detects pin position synoptic diagram for the newly-increased card of card reader control strip of the present invention; And
Fig. 6 is the synoptic diagram of unit card reader control chip preferred embodiment of the present invention.
Wherein, description of reference numerals is as follows:
1,2 unit card reader control chips
11,21 Compact Flash cards/Micro Drive card read-write interface
12,22 Smart Media/xD Picture Card card read-write interfaces
13,23 Secure Digital cards/Multi Media Card read-write interface
14,24 Memory Stick cards/Memory Stick Pro card read-write interface
3 card reader device
31 unit card reader control chips
311 cards detect the pin position
32 resistance
33 storage card decks
The VDD power supply
5 card reader device
51 unit card reader control chips
511 first detect pin
52 resistance
53 storage card decks
531 first grounding leg positions
532 second grounding leg positions
6 card reader device
61 unit card reader control chips
611 first detect pin
612 second detect pin
621,622 resistance
63 storage card decks
631 first grounding leg positions
632 cards detect the pin position
Embodiment
When All-in-One storage card unit card reader control chip utilizes the less encapsulation of pin number order in order to reduce packaging cost, need pin-sharing to couple the above storage card read-write interface of two cards simultaneously, if when wishing that access simultaneously surpasses a storage card, will face the storage card read-write interface because of the relation of shared unit card reader control chip pin position and produce mutually and disturb.
Unit card reader control chip of the present invention can detect this effectively in advance and disturb, and then by the mechanism that detects this interference in advance, can utilize error mechanism to handle effectively in response to problems such as storage card read-write mistakes.
The normal on the market at present storage card kind of using, comprise CF card, Micro Drive card, SD card, mmc card, MS Pro card and xD-Picture card etc., all storage cards all can provide card to detect pin position (card detect pin) on specifications design, as shown in Figure 3, this figure detects pin position synoptic diagram for the unit card reader control chip card.Card reader device 3 generally detects the variation of pin position 311 on voltage level by the card on the unit card reader control chip 31 and judges that storage card is to be inserted into or to be pulled out storage card read-write interface (storage card deck 33 as shown in Figure 3).So card detects pin position 311 and has the design of pull-up resistor 32 (pullup) to power vd D, when no storage card exists on the deck 33, the voltage level that unit card reader control chip 31 detects card detection pin position 311 is logical one (logic high), when storage card inserts deck, card detects the ground connection (ground) that pin position 311 can be shorted to power supply, is logical zero (logic low).So when storage card when deck 33 is pulled out, the voltage that card detects pin position 311 can become logical one from logical zero again.Therefore, unit card reader control chip 31 can come the detection of stored card whether to exist by the change in voltage that card detects on the pin position 311.And card detects the method that pin position 311 is shorted to power ground, and is different according to the different storing card kind, has plenty of the electrical specification of utilization, and what have then is to utilize the mechanism design of deck 33 to reach.In addition, pull-up resistor 32 can design to unit card reader control chip 31 inside or use resistive element in unit card reader control chip 31 outsides.
In sum as can be known, unit card reader control chip 31 couples by storage card deck 33 and storage card, though the deck that the storage card of all kinds is arranged in pairs or groups all is different in the design in the mechanism, the design concept that card detects the pin position is all the same.When the storage card of all kinds was inserted into affiliated storage card deck, it was that the metal that touches deck at last couples a little forever that the card of storage card detects the pin position.Therefore, when unit card reader control chip detected the pin position and detects storage card and be inserted into deck by card, other signal pins on the storage card had coupled with unit card reader control chip in fact.Such design concept is to wish unit card reader control chip when beginning is linked up with storage card, and all signal pins of storage card are all stable to be coupled to unit card reader control chip by deck.
See also Fig. 4, this figure is that the reference deck with xD-Picture is the synoptic diagram of example.Each pin is that the xD-Picture storage card is when inserting or extracting, with the contact point of deck with thick line sign place among the figure.As seen from Figure 4, the card of unit card reader control chip detection pin position touches the latest by deck and xD-Picture storage card.And the deck of other kind storage cards also meets this principle.
Therefore, need at the signal pin of many storage cards under the situation of pin position of shared unit card reader control chip, when unit card reader control chip just passes through a deck at read/write first storage card, if in another deck, there is second storage card to be inserted into, because when unit card reader control chip detects the pin position and detects second storage card and be inserted into by card, according to aforesaid principle, other signal pins of second storage card have coupled with unit card reader control chip than card detection pin position is Zao in fact; Therefore, storage card interferes with each other the mistake that is caused and finds just to have taken place before second storage card is inserted at unit card reader control chip, handles so unit card reader control chip also has little time to carry out any error mechanism.So the access action of first storage card will have influence on the data of read-write first storage card because of the insertion of second storage card, and the data of reading and writing first storage card will have influence on data integrity because of being interfered.Hence one can see that, and as if shared unit card reader control chip pin position, will be interfered because of above-mentioned reason causes any possible mistake to take place between the variety classes storage card.
So the problem that is taken place during the pin position of the shared unit card reader control chip of signal pin that will thoroughly solve many storage cards, it is not enough only relying on card to detect the pin position.So the present invention is convenient all to have the design of plural power ground voltage (supply voltage ground) Vss at least with the storage card of each kind, one of them Vss brought be used as another card and detect the use of pin position.Because by the standard of design of the deck under the various storage cards and various memory card specifications books, when storage card was inserted into deck, what contact deck at first was exactly Vss pin position, as shown in Figure 4, and the deck of other kind storage cards also is like this.Therefore, can utilize Vss to touch the principle of deck at first, allow unit card reader control chip detect storage card ahead of time and be inserted into deck, and before other signal pins of storage card are not coupled to unit card reader control chip as yet, allow unit card reader control chip can be ahead of time in response to, handle and make up to carry out error mechanism.
See also Fig. 5, this figure detects pin position synoptic diagram for the newly-increased card of unit card reader control chip of the present invention, unit card reader control chip 51 can use aforementioned card to detect the principle that the pin position is detected, newly-increased one first is detected the first grounding leg position 531 (Vss1 Ground Pin) that pin 511 couples storage card deck 53, and utilize the design of pull-up resistor 52 to power vd D, with detection of stored card Vss1 signal.Because the second grounding leg position 532 (Vss2 Ground Pin) still can be coupled to the power ground of system on the circuit system of card reader device 5, and Vss1 and Vss2 are designed at the storage card internal short-circuit and are same equipotential, so when storage card is inserted into storage card deck 53, will be coupled to power ground by the second grounding leg position 532 because of the Vss2 of storage card, become logical zero by logical one and make first of unit card reader control chip 51 detect pin 511 voltage levels.Otherwise, when storage card when deck 53 is pulled out, first detects pin 511 voltage levels will become logical one by logical zero, unit card reader control chip 51 also can detect; And when storage card when deck 53 is pulled out because storage card still has Vss2 to be coupled to power ground by the second grounding leg position 532, therefore can't cause storage card to produce instability or other problems in the use.
Then see also Fig. 6, this figure is the synoptic diagram of unit card reader control chip preferred embodiment of the present invention, when the signal pin of many storage cards in the card reader device 6 needs the pin position of shared unit card reader control chip 61, unit card reader control chip 61 of the present invention provides the first detection pin 611 and second to detect pin 612 and is coupled to one of them storage card deck 63 (storage card read-write interface), wherein the first detection pin 611 is coupled to the pin position that touches the storage card metallic contact in the storage card deck 63 at first, preferable, the pin position that touches the storage card metallic contact in the storage card deck 63 at first is the first grounding leg position 631 that couples storage card Vss1 pin position; Second detects pin 612 is coupled to the pin position that touches the storage card metallic contact in the storage card deck 63 the latest, preferable, and the pin position that touches the storage card metallic contact in storage card deck 63 the latest is that the card that couples storage card detects pin position 632.
And be coupled to other storage card decks on the unit card reader control chip 61 (figure does not show), can couple with above-mentioned method.Whereby, whether unit card reader control chip 61 detects when unit card reader control chip 61 read-writes first storage card by each first detection pin 611 and basis principle as described in Figure 5, have another second storage card to insert in other storage card decks.If during unit card reader control chip 61 read-writes first storage card, there is another second storage card to insert in other storage card decks, be coupled to the first detection pin of the storage card deck that inserts second storage card this moment on the unit card reader control chip 61, design concept according to pull-up resistor 621, its voltage level will become logical zero by logical one, and expression has another storage card to insert.Because first what detect that pin coupled is the pin (Vss pin as described above) that touches the storage card metallic contact on the storage card deck at first, so unit card reader control chip 61 does not interfere with each other at storage card and promptly detects in advance before the generation, therefore help the eliminating of follow-up mistake.
Yet, know that by Fig. 4 when storage card inserts deck, the card of storage card detects the pin position will be last pin position that is touched, relative, when storage card was pulled out deck, card detects the pin position will be than the Zao state of contact of leaving in other pin positions.So unit card reader control chip 61 can detect when unit card reader control chip 61 read-writes first storage card by each second detection pin 612 and basis principle as described in Figure 3, whether another second storage card is arranged by extracting in other storage card decks.If during unit card reader control chip 61 read-writes first storage card, another second storage card is arranged by extracting in other storage card decks, be coupled to the second detection pin of the storage card deck of extracting second storage card this moment on the unit card reader control chip 61, design concept according to pull-up resistor 622, its voltage level will become logical one by logical zero, and expression has another storage card to be about to be pulled out deck.So unit card reader control chip 61 can not interfere with each other at storage card and promptly detects in advance before the generation, therefore helps follow-up error mechanism and handles.
As long as the unit card reader control chip of total pin position can be learnt before disturbing generation in advance, both made the time that several milliseconds (ms) are only arranged, all be enough to allow unit card reader control chip do suitable processing.For example: when unit card reader control chip in read-write during first storage card, detecting second storage card is inserted into or extracts, then unit card reader control chip can produce the interference notification signal, and the action that stops and abandoning reading and writing first storage card at once, then reply rub-out signal and give computer or the main frame that unit card reader control chip coupled, allow computer or main frame attempt reading and writing the storage card that is coupled to unit card reader control chip again.
The method of fault processing is a variety of, above-mentionedly only is a kind of embodiment wherein.Its key is to use the present invention to shift to an earlier date the method that detection of stored card end interferes with each other, could be correct carry out follow-up fault processing.
The above only is the present invention's preferred embodiment wherein, is not to be used for limiting practical range of the present invention; Therefore, all equal variation and modifications of being done according to claim scope of the present invention all should be the present invention and contain.
Claims (11)
1. unit card reader control chip, wherein the pin of this unit card reader control chip can be shared for a plurality of storage card read-write interfaces, it is characterized in that this unit card reader control chip comprises:
A plurality of first detects pin, couples a pin of described a plurality of storage card read-write interfaces respectively, and described a plurality of first detects described a plurality of pins that pin coupled is respectively the pin that touches storage card in described a plurality of storage card read-write interface at first;
Whether wherein, this unit card reader control chip utilizes described a plurality of first detection pin to detect has storage card to insert described a plurality of storage card read-write interface.
2. unit card reader control chip as claimed in claim 1 is characterized in that described a plurality of first detects described a plurality of pins that pin coupled, and is the pin of the Vss pin position of contact storage card in described a plurality of storage card read-write interfaces.
3. unit card reader control chip as claimed in claim 1 is characterized in that, further comprises:
A plurality of second detects pin, couples a pin of described a plurality of storage card read-write interfaces respectively, and described a plurality of second detection described a plurality of pins that pin coupled are individually for touching the pin of storage card at last in described a plurality of storage card read-write interfaces;
Whether wherein, this unit card reader control chip utilizes described a plurality of second detection pin to detect has storage card to extract described a plurality of storage card read-write interface.
4. unit card reader control chip as claimed in claim 3 is characterized in that described a plurality of second detects described a plurality of pins that pin coupled, and detects the pin of pin position for the card of contact storage card in described a plurality of storage card read-write interfaces.
5. a unit card reader control chip detects the method for disturbing, and wherein the pin of this unit card reader control chip can be shared for a plurality of storage card read-write interfaces, it is characterized in that, detects the step of disturbing and comprises:
At least one first detection pin is provided on this unit card reader control chip, whether insert described a plurality of storage card read-write interface in one of them with the detection of stored card, wherein this first detects pin and couples one of them the pin that touches this storage card at first of described a plurality of storage card read-write interface; And
When described a plurality of storage card read-write interfaces when an existing storage card is in the transmission data in one of them, if this unit card reader control chip first detects pin and detected another storage card and insert described a plurality of storage card read-write interface in one of them by this, then produce first and disturb notification signal.
6. unit card reader control chip as claimed in claim 5 detects the method for disturbing, and it is characterized in that, this first detection this pin that pin coupled is the pin of the Vss pin position of this storage card read-write interface contact storage card.
7. unit card reader control chip as claimed in claim 5 detects the method for disturbing, and it is characterized in that, also comprises step:
At least one second detection pin is provided on this unit card reader control chip, whether extract in one of them in described a plurality of storage card read-write interfaces with the detection of stored card, wherein this second detects pin and couples one of them the pin that touches this storage card at last of described a plurality of storage card read-write interface.
8. unit card reader control chip as claimed in claim 7 detects the method for disturbing, and it is characterized in that, also comprises step:
When described a plurality of storage card read-write interfaces when an existing storage card is in the transmission data in one of them, one of them is extracted at described a plurality of storage card read-write interfaces if this unit card reader control chip has detected another storage card by this second detection pin, then produces second and disturbs notification signal.
9. unit card reader control chip as claimed in claim 7 detects the method for disturbing, and it is characterized in that this second detection this pin that pin coupled detects the pin of pin position for the card of the contact storage card of this storage card read-write interface.
10. unit card reader control chip as claimed in claim 8 detects the method for disturbing, and it is characterized in that, also comprises step:
First disturb notification signal and this second to disturb notification signal after one of them when this unit card reader control chip produces this, then this unit card reader control chip stops to read and write this storage card.
11. unit card reader control chip as claimed in claim 10 detects the method for disturbing, and it is characterized in that, also comprises step:
Carry out the program of reading and writing described a plurality of storage cards again by the main frame that is coupled to this unit card reader control chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710088697A CN100585611C (en) | 2007-03-16 | 2007-03-16 | Unit card reader control chip and its method for checking interference |
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| CN200710088697A CN100585611C (en) | 2007-03-16 | 2007-03-16 | Unit card reader control chip and its method for checking interference |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986327A (en) * | 2010-09-06 | 2011-03-16 | 建荣集成电路科技(珠海)有限公司 | Detection pin-free method for detecting on-line and off-line conditions of secure digital/multimedia card (SD/MMC) |
| CN101923504B (en) * | 2009-06-16 | 2012-11-21 | 鸿富锦精密工业（深圳）有限公司 | Card reader testing tool and card reader testing method |
| CN103197225A (en) * | 2012-01-06 | 2013-07-10 | 珠海天威技术开发有限公司 | Testing method of single bus chip |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI789147B (en) * | 2021-12-07 | 2023-01-01 | 瑞昱半導體股份有限公司 | Card reading device and electronic device with card reading function |
-
2007
- 2007-03-16 CN CN200710088697A patent/CN100585611C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923504B (en) * | 2009-06-16 | 2012-11-21 | 鸿富锦精密工业（深圳）有限公司 | Card reader testing tool and card reader testing method |
| CN101986327A (en) * | 2010-09-06 | 2011-03-16 | 建荣集成电路科技(珠海)有限公司 | Detection pin-free method for detecting on-line and off-line conditions of secure digital/multimedia card (SD/MMC) |
| CN103197225A (en) * | 2012-01-06 | 2013-07-10 | 珠海天威技术开发有限公司 | Testing method of single bus chip |
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| CN100585611C (en) | 2010-01-27 |
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