CN106788522B - A kind of device, method and mobile terminal for reading and writing card - Google Patents
A kind of device, method and mobile terminal for reading and writing card Download PDFInfo
- Publication number
- CN106788522B CN106788522B CN201611110578.8A CN201611110578A CN106788522B CN 106788522 B CN106788522 B CN 106788522B CN 201611110578 A CN201611110578 A CN 201611110578A CN 106788522 B CN106788522 B CN 106788522B
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- card
- card slot
- energization pins
- signal
- kato
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3816—Mechanical arrangements for accommodating identification devices, e.g. cards or chips; with connectors for programming identification devices
- H04B1/3818—Arrangements for facilitating insertion or removal of identification devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0277—Details of the structure or mounting of specific components for a printed circuit board assembly
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Sources (AREA)
Abstract
The present invention provides a kind of device, method and mobile terminals for reading and writing card, to avoid the problem of burning out card during plug Kato.The device of the read-write card includes: Kato, and the Kato includes the first card slot and the second card slot, and second card slot is arranged in parallel in the inside of first card slot；Control module, for after the Kato is fully inserted into described device, when detecting has card in first card slot, the energization pins of the first card slot of Xiang Suoshu to be powered, when being not detected has card in first card slot, stop powering to the energization pins of first card slot.
Description
Technical field
The present invention relates to field of circuit technology more particularly to a kind of device, method and mobile terminals for reading and writing card.
Background technique
Nowadays more and more mobile terminal devices use " with or card " read-write card device, as shown in Figure 1, adopting
Taking the Kato 110 of the mobile terminal of this device, there are two card slots, i.e. the first card slot 120 and the second card slot 130, can support two
SIM (Subscriber Identification Module, client identification module) card or a SIM card, a SD card
(Secure Digital Memory, safe digital card).
However, in the case where mobile terminal is in open state, the energization pins of the first card slot 120 and the second card slot 130 are
The power supply signal of high level, when carrying out hot plug, i.e., when Kato being inserted into mobile terminal or extracted from mobile terminal, second
The SIM card loaded on card slot may touch the corresponding energization pins of the first card slot 120, and the SIM card is caused to burn out.For convenient for
Understand, Fig. 2 illustrates schematic diagram when extracting Kato from mobile terminal, and dotted line frame indicates the SIM card in the second card slot 130
201 with Kato moving process, during SIM card in the second card slot of SIM 130 is mobile, SIM card 201 may be contacted
To the corresponding energization pins 202 of the first card slot 120.
In conclusion the energization pins of outer side bayonet slot receive high level when being in open state due to mobile terminal
Power supply signal, therefore during inserting or pull out Kato, the card in interior side bayonet slot is likely to be exposed the power supply of outer side bayonet slot
Pin causes to burn out the card.
Summary of the invention
The embodiment of the invention provides a kind of device, method and mobile terminals for reading and writing card, avoid in removable card
The problem of burning out card during support.
A kind of device for reading and writing card provided in an embodiment of the present invention, comprising:
Kato, the Kato include the first card slot and the second card slot, and second card slot is arranged in parallel in first card
The inside of slot；
Control module, for after the Kato is fully inserted into described device, when detecting in first card slot there is card
When piece, the energization pins of the first card slot of Xiang Suoshu are powered, and when being not detected has card in first card slot, are stopped to described
The energization pins of first card slot are powered.
In the embodiment of the present invention, after the device that Kato is fully inserted into read-write card, the elastic slice in the device will be with Kato
It is connected to form closed loop, control module will test in the first card slot whether have card at this time, not block in the first card slot if detecting
Piece then stops powering to the energization pins of the first card slot, therefore when extracting Kato, avoids card in the second card slot and contacts the
The energization pins of one card slot lead to the problem of burning out the card.
Preferably, the control module includes:
Interrupt pin, for receiving the interrupt signal for indicating whether there is card in first card slot；
Power pin, for receiving power supply signal；
AND gate circuit, when the interrupt pin, which receives, to be indicated to have the interrupt signal of card in first card slot, to
The energization pins of first card slot are powered, and indicate have in card in first card slot when the interrupt pin does not receive
When break signal, stop powering to the energization pins of first card slot；Wherein, the input terminal of the AND gate circuit respectively with it is described
Interrupt pin is connected with the power pin.
Preferably, the interrupt signal that the interrupt pin receives is high level when having card in first card slot
Signal；When not having card in first card slot, the interrupt signal that the interrupt pin receives is low level signal.
Preferably, the AND gate circuit is specifically used for, when the signal that the interrupt signal received is high level, and institute
When stating the signal that power supply signal is high level, the electric current of the energization pins output high level of the first card slot of Xiang Suoshu；When receiving
Interrupt signal when being low level signal, the energization pins of the first card slot of Xiang Suoshu export low level electric current.
Preferably, first card slot is used for loading client identification module SIM card or storage card, second card slot
In loading client identification module SIM card or storage card.
A kind of method of the read-write card of device above-mentioned applied to any one provided in an embodiment of the present invention, comprising:
Whether after detecting that Kato is fully inserted into device, detecting in the first card slot of the Kato has card；
When detecting has card in first card slot, the energization pins of the first card slot of Xiang Suoshu are powered, when not detecting
When having card into first card slot, stop powering to the energization pins of first card slot.
In the embodiment of the present invention, after the device that Kato is fully inserted into read-write card, the elastic slice in the device will be with Kato
It is connected to form closed loop, control module will test in the first card slot whether have card at this time, not block in the first card slot if detecting
Piece then stops powering to the energization pins of the first card slot, therefore when extracting Kato, avoids card in the second card slot and contacts the
The energization pins of one card slot lead to the problem of burning out the card.
Preferably, whether thering is card to specifically include in the first card slot of the detection Kato:
It detects whether to receive the interrupt signal for indicating there is card in first card slot.
Preferably, described when detecting has card in first card slot, the energization pins of the first card slot of Xiang Suoshu are supplied
Electricity stops powering to the energization pins of first card slot when being not detected has card in first card slot, comprising:
When the signal that the interrupt signal received is high level, and the power supply signal received is the signal of high level
When, the electric current of the energization pins output high level of the first card slot of Xiang Suoshu, when the interrupt signal received is low level
When signal, the energization pins of the first card slot of Xiang Suoshu export low level electric current.
Preferably, the card is client identification module SIM card or storage card.
A kind of mobile terminal provided in an embodiment of the present invention, comprising: the device of above-mentioned read-write card.
The embodiment of the invention provides a kind of device, method and mobile terminals for reading and writing card, are fully inserted into Kato
After reading and writing the device of card, the elastic slice in the device will be connected to form closed loop with Kato, if control module will receive table at this time
Showing does not have the interrupt signal of card in the first card slot, then stops powering to the energization pins of first card slot, avoid yet
When extracting or being inserted into Kato, the energization pins that card contacts the first card slot in the second card slot lead to the problem of burning out the card.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the device for the read-write card that the prior art provides；
Fig. 2 is the schematic diagram that Kato is extracted from the device for the read-write card that the prior art provides；
Fig. 3 a, Fig. 3 b are the structural schematic diagram of the device of read-write card provided by Embodiment 2 of the present invention；
Fig. 4 is the flow diagram of the method for the read-write card that the embodiment of the present invention four provides.
Specific embodiment
The embodiment of the invention provides a kind of device, method and mobile terminals for reading and writing card, are fully inserted into reading in Kato
After writing the device of card, the elastic slice in the device will be connected to form closed loop with Kato, and control module will test the first card slot at this time
In whether have card, if detecting in the first card slot there is no card, stop to the energization pins of the first card slot power, therefore
When extracting Kato, avoiding the energization pins that card contacts the first card slot in the second card slot leads to the problem of burning out the card.
Following will be combined with the drawings in the embodiments of the present invention, is clearly and completely retouched to the technical solution in the present invention
It states, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment one:
A kind of device for read-write card that the embodiment of the present invention one provides, comprising:
Kato, the Kato include the first card slot and the second card slot；Wherein, along described in Kato insertion in the Kato
The direction of device is disposed with the first card slot and the second card slot, wherein second card slot is to be parallel to first card slot
It is arranged；
Control module, for after the Kato is fully inserted into described device, when detecting in first card slot there is card
When piece, the energization pins of the first card slot of Xiang Suoshu are powered, and when being not detected has card in first card slot, are stopped to described
The energization pins of first card slot are powered.
Specifically, after the first card slot is fully inserted into described device, the energization pins of the first card slot and the control module
Energization pins be connected, and the energization pins of the first card slot are connected with the energization pins of the card in the first card slot, that is, work as detection
There is card into first card slot, is i.e. when the energization pins of control module receive supply current, supply current is passed through again
The energization pins of first card slot are transferred to the energization pins of the card in the first card slot, that is, the card being transferred in the first card slot；
There is card when being not detected in first card slot, i.e., it, will no longer when the energization pins of control module do not receive supply current
The energization pins for the card for having supply current to be transferred in the first card slot by the energization pins of the first card slot, that is, stop to described
The energization pins of first card slot are powered.
Wherein, the positional relationship of the first card slot and the second card slot is specifically defined in the embodiment of the present application one, i.e., along described
The direction of Kato insertion described device is disposed with the first card slot and the second card slot, or it may be said that for when Kato be inserted into terminal/
When in device, the second card slot is preferentially entered in the device or mobile terminal of read-write card.
Embodiment two:
Referring to Fig. 3 a and Fig. 3 b, the device of read-write card provided by Embodiment 2 of the present invention, comprising: Kato 300；Control mould
Block 310；Power module 320；Interrupt signal generation module 330；
Wherein, the direction in Kato 300 along Kato insertion described device is disposed with the first card slot and the second card
Slot, wherein second card slot is to be parallel to first card slot to be arranged；Wherein, between the first card slot and the second card slot
Positional relationship are as follows: holding part 111 (referring to Kato shown in Fig. 1) with Kato is recently outside, is farthest inside.Or
Person, when in Kato insertion terminal/device, the second card slot is preferentially entered in the terminal/device.
Wherein, control module 310 includes: for receiving the interrupt signal for indicating whether there is card in first card slot
Interrupt pin 311；For receiving the power pin 312 of power supply signal；AND gate circuit 313；Wherein, the AND gate circuit 313 is used
In when the interrupt pin, which receives, to be indicated to have the interrupt signal of card in first card slot, the confession of the first card slot of Xiang Suoshu
Electric pin powered, when the interrupt pin, which does not receive, to be indicated to have the interrupt signal of card in first card slot, stop to
The energization pins of first card slot are powered；Wherein, the input terminal of the AND gate circuit respectively with the interrupt pin and described
Power pin is connected.
Wherein, the output end of AND gate circuit is connected in the energization pins with the control module of first card slot.
Specifically, the connection relationship in the device between modules is concretely:
Referring to Fig. 3 a, the interrupt pin 311 of control module 310 is connected with the interrupt signal generation module 330, controls mould
The power pin 312 of block 310 is connected with the power module 320, the first output end of the AND gate circuit 313 of control module 310
It is connected with the energization pins 301 of the first card slot；The energization pins 302 of second card slot are connected with power module 320；Interrupt signal is raw
It is connected respectively with the interrupt pin of the interrupt pin of the first card slot and the second card slot at module 330.Specifically, control module 310
Interrupt pin 311 be connected with the energization pins 301 of the first card slot, and the energization pins of the first card slot in the first card slot
The energization pins of card are connected.Alternatively,
Referring to Fig. 3 b, the interrupt pin 311 of control module 310 is connected with the interrupt signal generation module 330, controls mould
The power pin 312 of block 310 is connected with the power module 320, the first output end of the AND gate circuit 313 of control module 310
It is connected with the energization pins 301 of the first card slot, second output terminal and the second card slot of the AND gate circuit 313 of control module 310
Energization pins 302 are connected；Interruption of the interrupt signal generation module 330 respectively with the interrupt pin of the first card slot and the second card slot is drawn
Foot is connected.Specifically, the interrupt pin 311 of control module 310 is connected with the energization pins of the first card slot, the power supply of the first card slot
Pin is connected with the energization pins of the card in the first card slot, and interrupt pin 311 is connected with the energization pins of the second card slot,
The energization pins of second card slot are connected with the energization pins of the card in the second card slot.
Specifically, when having card in first card slot, the interrupt signal that the interrupt pin receives is high level
Signal；When the interrupt signal received is the signal of high level, and the power supply signal is the signal of high level, to
The electric current of the energization pins output high level of first card slot, i.e., power to the energization pins of first card slot.
Specifically, when not having card in first card slot, the interrupt signal that the interrupt pin receives is low electricity
Flat signal；When the interrupt signal received is low level signal, the energization pins output of the first card slot of Xiang Suoshu
Low level electric current stops powering to the energization pins of first card slot.
Wherein, the level range of the low level signal be more than or equal to 0 volt, and be less than or equal to 0.4 volt；The height
The level range of level signal is more than or equal to 1.8 volts.As long as and the device for reading and writing card is open state, power module
320 provide 1.8 volts of power supply signal.
Wherein, for loading client identification module SIM card or storage card, second card slot is used for first card slot
Load client identification module SIM card or storage card.
Connection relationship bring technical effect shown in Fig. 3 a or Fig. 3 b: the device of read-write card is fully inserted into Kato
Afterwards, the elastic slice in the device will be connected to form closed loop with Kato, and control module will test in the first card slot whether have card at this time,
If detecting in the first card slot there is no card, stop powering to the energization pins of the first card slot, therefore when extracting Kato, keep away
Having exempted from the energization pins that card contacts the first card slot in the second card slot causes the problem of burning out the card, and when nothing in the first card slot
When card, the level of energization pins is very low, also just saves electric power resource.
Embodiment three:
A kind of mobile terminal that the embodiment of the present invention three provides, comprising: the device of above-mentioned read-write card.
Wherein, the mobile terminal is open state, then the device for reading and writing card is open state, unless described mobile whole
It holds from software view and says that the device of read-write card is closed, i.e., the level of power supply signal is 0 volt.
In the embodiment of the present invention, after the device that Kato is fully inserted into read-write card, the elastic slice in the device will be with Kato
It is connected to form closed loop, control module will test in the first card slot whether have card at this time, not block in the first card slot if detecting
Piece then stops powering to the energization pins of the first card slot, therefore when extracting Kato, avoids card in the second card slot and contacts the
The energization pins of one card slot lead to the problem of burning out the card.
Example IV:
Referring to fig. 4, a kind of method for read-write card that the embodiment of the present invention four provides can be applied to the above-mentioned dress of any one
It sets, comprising:
S401, after detecting that Kato is fully inserted into device, whether detect in the first card slot of the Kato has card；
S402, when detecting has card in first card slot, the energization pins of the first card slot of Xiang Suoshu are powered, when not
It detects when having card in first card slot, stops powering to the energization pins of first card slot.
Specifically, whether card specifically includes in the first card slot of the detection Kato:
It detects whether to receive the interrupt signal for indicating there is card in first card slot.
Specifically, described when detecting has card in first card slot, the energization pins of the first card slot of Xiang Suoshu supply
Electricity stops powering to the energization pins of first card slot when being not detected has card in first card slot, comprising:
When the signal that the interrupt signal received is high level, and the power supply signal received is the signal of high level
When, the electric current of the energization pins output high level of the first card slot of Xiang Suoshu, when the interrupt signal received is low level
When signal, the energization pins of the first card slot of Xiang Suoshu export low level electric current.
Specifically, the card is client identification module SIM card or storage card.
Specifically, the level range of the low level message be more than or equal to 0 volt, and be less than or equal to 0.4 volt.
In conclusion the embodiment of the invention provides a kind of device, method and mobile terminal for reading and writing card, it is complete in Kato
After being fully inserted into the device of read-write card, the elastic slice in the device will be connected to form closed loop with Kato, and control module will test at this time
Whether there is card in first card slot, if detecting in the first card slot there is no card, stops supplying to the energization pins of the first card slot
Electricity, therefore when extracting Kato, avoiding the energization pins that card contacts the first card slot in the second card slot causes to burn out the card
The problem of.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of device for reading and writing card characterized by comprising
Kato, the Kato include the first card slot and the second card slot, and second card slot is arranged in parallel in first card slot
Inside；
Control module, for after the Kato is fully inserted into described device, when detecting has card in first card slot,
It powers to the energization pins of first card slot, when being not detected has card in first card slot, stops to described first
The energization pins of card slot are powered；
Wherein, the energization pins of the control module are connected with the energization pins of the first card slot, and the energization pins of the first card slot
It is connected with the energization pins of the card in the first card slot, when the energization pins of the control module receive supply current, really
There is card in fixed first card slot；When the energization pins of the control module do not receive supply current, described is determined
There is no card in one card slot.
2. the apparatus according to claim 1, which is characterized in that the control module includes:
Interrupt pin, for receiving the interrupt signal for indicating whether there is card in first card slot；
Power pin, for receiving power supply signal；
AND gate circuit, for when the interrupt pin, which receives, to be indicated to have the interrupt signal of card in first card slot, to
The energization pins of first card slot are powered, and indicate have in card in first card slot when the interrupt pin does not receive
When break signal, stop powering to the energization pins of first card slot；Wherein, the input terminal of the AND gate circuit respectively with it is described
Interrupt pin is connected with the power pin.
3. the apparatus of claim 2, which is characterized in that when having card in first card slot, the interruption pipe
The interrupt signal that foot receives is the signal of high level；When not having card in first card slot, the interrupt pin is received
The interrupt signal arrived is low level signal.
4. device according to claim 3, which is characterized in that the AND gate circuit is specifically used for, described in receiving
Interrupt signal be high level signal, and the power supply signal be high level signal when, the power supply of the first card slot of Xiang Suoshu is drawn
The electric current of foot output high level；When the interrupt signal received is low level signal, the confession of the first card slot of Xiang Suoshu
Electric pin exports low level electric current.
5. device according to any one of claims 1 to 4, which is characterized in that first card slot is for loading client's knowledge
Perhaps storage card second card slot is used to load client identification module SIM card or storage card other Module SIM card.
6. a kind of method of the read-write card applied to the described in any item devices of claim 1-5 characterized by comprising
Whether after detecting that Kato is fully inserted into device, detecting in the first card slot of the Kato has card；
When detecting has card in first card slot, the energization pins of the first card slot of Xiang Suoshu are powered, when being not detected
It states when having card in the first card slot, stops powering to the energization pins of first card slot.
7. according to the method described in claim 6, it is characterized in that, whether having in the first card slot of the detection Kato
Card specifically includes:
It detects whether to receive the interrupt signal for indicating there is card in first card slot.
8. the method according to the description of claim 7 is characterized in that described when detecting has card in first card slot,
It powers to the energization pins of first card slot, when being not detected has card in first card slot, stops to described first
The energization pins of card slot are powered, comprising:
When the interrupt signal received is the signal of high level, and the power supply signal received is the signal of high level,
To the electric current of the energization pins of first card slot output high level, when the interrupt signal received is low level signal
When, the energization pins of the first card slot of Xiang Suoshu export low level electric current.
9. according to the method described in claim 8, it is characterized in that, the card is client identification module SIM card or storage
Card.
10. a kind of mobile terminal characterized by comprising the device of the described in any item read-write cards of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611110578.8A CN106788522B (en) | 2016-12-02 | 2016-12-02 | A kind of device, method and mobile terminal for reading and writing card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611110578.8A CN106788522B (en) | 2016-12-02 | 2016-12-02 | A kind of device, method and mobile terminal for reading and writing card |
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| Publication Number | Publication Date |
|---|---|
| CN106788522A CN106788522A (en) | 2017-05-31 |
| CN106788522B true CN106788522B (en) | 2019-06-14 |
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| CN201611110578.8A Active CN106788522B (en) | 2016-12-02 | 2016-12-02 | A kind of device, method and mobile terminal for reading and writing card |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109188980A (en) * | 2018-09-29 | 2019-01-11 | 北京聚利科技股份有限公司 | The power control method and card reader of card reader |
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| CN105245671A (en) * | 2015-10-13 | 2016-01-13 | Tcl移动通信科技（宁波）有限公司 | Mobile terminal, detecting device and method for plugging and unplugging of SD (Secure Digital) card thereof |
| CN105786146A (en) * | 2016-03-02 | 2016-07-20 | 惠州Tcl移动通信有限公司 | Mobile terminal and method for preventing power cross short circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064816A (en) * | 2013-01-07 | 2013-04-24 | 华为终端有限公司 | SIM (subscriber identity module) card hot plug protection method and terminal, and SIM card in-place power-down swiping method and terminal |
| CN105245671A (en) * | 2015-10-13 | 2016-01-13 | Tcl移动通信科技（宁波）有限公司 | Mobile terminal, detecting device and method for plugging and unplugging of SD (Secure Digital) card thereof |
| CN105786146A (en) * | 2016-03-02 | 2016-07-20 | 惠州Tcl移动通信有限公司 | Mobile terminal and method for preventing power cross short circuit |
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| CN106788522A (en) | 2017-05-31 |
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