CN106412152A - SIM card detection method based on mobile terminal and mobile terminal - Google Patents
SIM card detection method based on mobile terminal and mobile terminal Download PDFInfo
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- CN106412152A CN106412152A CN201610400950.2A CN201610400950A CN106412152A CN 106412152 A CN106412152 A CN 106412152A CN 201610400950 A CN201610400950 A CN 201610400950A CN 106412152 A CN106412152 A CN 106412152A
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- sim
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- mobile terminal
- gpio
- vdd
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Classifications
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- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
Abstract
The present invention discloses an SIM card detection method based on a mobile terminal and a mobile terminal. The mobile terminal comprises a card interface, a detection circuit and a central processor which are connected in order; the central processor is connected with the detection circuit through a GPIO pin and is configured to insert a card into a card stand if there is a card after the mobile terminal is started up; each pin of the card interface is contacted with each pin of the SIM card; the resistance between the VDD pin and the VSS pin of the SIM card is smaller than the first resistance, and the VDD position is located at low level; it is detected that the GPIO is low-level interruption, and it is determined that it is detected that the SIM card is inserted; and the switching of the switch is controlled to supply power to the SIM card through a power supply end VLDO. According to the invention, the purpose of replacing the SIM card in the start-up state of the mobile terminal without influence of the prior art, and the metal shrapnel for detection of the SIM card on the card stand can be removed so as to reduce the size of the card stand.
Description
Technical field
The present invention relates to field of mobile terminals, more particularly, to a kind of SIM detection method based on mobile terminal and
Mobile terminal.
Background technology
In the prior art, enabled the detection to SIM insertion under mobile terminal-opening state, thus using
Family exempts to change the worry that SIM needs to shut down every time.In prior art, for the SIM insertion inspection under mobile terminal-opening state
Survey is adopted using following scheme：
Extra one GPIO pin of increase in SIM card holder is needed to be used for realizing the interruption detection of SIM insertion；Therefore, deck
On also need in addition to the pin of SIM function itself pin for SIM insertion interruption detection.As shown in figure 1,
Insert the schematic diagram of deck for the most frequently used SIM in prior art, GPIO pin connects one when being not inserted into SIM in deck
Resistance Rp is pulled to VLDO；When being not inserted into SIM in deck, metal clips is pulled to VLDO, is high level；Work as SIM
After insertion deck, metal clips is contacted with deck, and deck wall is ground connection, therefore, is low level at metal clips；Cause
This, for which kind of level, central processing unit only need to just can determine whether out whether SIM inserts deck according to metal clips.
The defect of prior art is, the metal clips of detection SIM insertion is located in deck, leads to deck volume relatively
Greatly.In addition, metal clips elasticity change unavoidably after a number of uses, the detection of impact SIM insertion.
Therefore, prior art has yet to be improved and developed.
Content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, provides a kind of whole based on moving
The SIM detection method at end and mobile terminal, can not affect to realize mobile terminal in prior art to open by this method
Change the purpose of SIM under machine state, the metal clips that SIM detection is used on deck in prior art can be removed simultaneously,
Reach the purpose reducing deck volume.
The technical scheme that present invention solution technical problem is adopted is as follows：
A kind of mobile terminal, wherein, including：The card interface that is sequentially connected, testing circuit, central processing unit；
Described card interface is provided with deck, for connecting each pin of SIM, be provided with described card interface VDD pin and
VSS pin, described VDD pin is used for powering to SIM, and described VSS pin is used for SIM and is grounded；
Testing circuit is connected with VDD, VSS foot of card interface；Include inside described testing circuit：One feeder ear VLDO, one open
Close and a first resistor, an and earth terminal, described switch is in parallel with described first resistor, described feeder ear VLDO by described simultaneously
The switch of connection and first resistor, connect to described VDD pin, described earth terminal is connected with described VSS pin；
Described central processing unit is connected with described testing circuit by GPIO foot, described for when the mobile terminal-opening after, controlling
Switch off, when SIM is not inserted into the deck of card interface, each foot of card interface is hanging, the VDD pin of card interface passes through the first electricity
Resistance is connected with feeder ear VLDO, and VDD is pulled to high level；Being additionally operable to work as has card insertion deck, each pin of card interface
Contact with each pin of SIM respectively；Resistance between SIM VDD pin and VSS foot is less than first resistor, at VDD is
Low level；GPIO is detected to interrupt for low level, then judge SIM insertion is detected；Controlling switch closes by feeder ear simultaneously
VLDO powers for SIM.
Described mobile terminal, wherein, includes inside described central processing unit：The switch control unit that is sequentially connected, in
Disconnected detector unit, interruption dispensing unit；Described interruption detector unit is connected with described testing circuit also by GPIO foot and connects
VDD pin to card interface；
Switch control unit is connected with the switch of described testing circuit, the closure for controlling switch or disconnection；
Interrupt GPIO foot in detector unit to be connected with the VDD pin of card interface, for detecting the interrupt signal on VDD pin；
Interrupt the interruption detection that dispensing unit is used for GP configuring IO foot；
After mobile terminal-opening, controlling switch is disconnected by switch control unit, and interruption configuration of described dispensing unit GPIO is low level
Interrupt；When SIM is not inserted into the deck of card interface, each foot of card interface is hanging, and VDD pin passes through first resistor and feeder ear
VLDO is connected, and VDD is pulled to high level；
When there being card insertion deck, each pin of card interface is contacted with each pin of SIM respectively；SIM VDD pin with
Resistance between VSS foot is less than first resistor, for low level at VDD；And GPIO interrupts for low level, interrupting detector unit will
SIM insertion is detected；Interrupt dispensing unit and GPIO is configured to not detect interruption, control is opened by Simultaneous Switching control unit
Close closure to be powered for SIM by feeder ear VLDO.
Described mobile terminal, wherein, the resistance of described first resistor is more than 10*Rds；Described Rds is that SIM is not powered
Resistance value under state, between SIM VDD foot and VSS foot.
Described mobile terminal, wherein, described first resistor is 600 M Ω, and feeder ear VLDO is 1.8V.
A kind of SIM detection method of base mobile terminal described above, wherein, including：
A, setting one is used for detecting the GPIO pin of SIM insertion, and when SIM is not inserted into, GPIO pin will detect high electricity
Flat, when SIM inserts, GPIO pin will detect low level；
B, in mobile terminal start-up course, arranges described GPIO and interrupts for trailing edge, and when described trailing edge interrupts producing
When think SIM insert；
C, under mobile terminal-opening state, if generation trailing edge interruption on GPIO is detected, is judged as that SIM inserts.
The described SIM detection method based on mobile terminal, wherein, described step A also includes：
Controlling switch is disconnected by A1 by the switch control unit of central processing unit, and interruption configuration of described dispensing unit GPIO is low electricity
Flat interruption.
The described SIM detection method based on mobile terminal, wherein, described step C also includes：
C1, when interruption detector unit detects and produces low level interruption at GPIO, interrupting dispensing unit can be configured to GPIO
Do not detect interruption, controlling switch closure is powered for SIM by Simultaneous Switching control unit by VLDO.
SIM detection method based on mobile terminal provided by the present invention and mobile terminal, methods described passes through setting
One GPIO is used for detecting that SIM inserts, GPIO pin will detect high level when SIM is not inserted into, when SIM inserts
GPIO pin will detect low level；In mobile terminal start-up course, described GPIO is set and interrupts for trailing edge, and work as institute
State trailing edge to interrupt when producing, thinking that SIM inserts；Under mobile terminal-opening state, decline if detecting and producing on GPIO
It is believed that SIM inserts when edge is interrupted.Can not affect in prior art, to realize mobile terminal-opening state by this method
The lower purpose changing SIM, can remove the metal clips being used for SIM detection on deck in prior art simultaneously, reach and subtract
The purpose that lesser calorie pedestal amasss.
Brief description
Fig. 1 is the SIM detection structure chart of the mobile terminal of prior art.
Fig. 2 is the functional schematic block diagram of the preferred embodiment of mobile terminal of the present invention.
Fig. 3 is the card interface partial structural diagram of the preferred embodiment of mobile terminal of the present invention.
Fig. 4 is the refinement functional schematic block diagram of the preferred embodiment of mobile terminal of the present invention.
Fig. 5 is the flow chart of the preferred embodiment based on the SIM detection method of described mobile terminal for the present invention.
Specific embodiment
For making the objects, technical solutions and advantages of the present invention clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention further describes.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and without
In the restriction present invention.
Refer to Fig. 2, Fig. 2 is the functional schematic block diagram of the preferred embodiment of mobile terminal of the present invention.As shown in Fig. 2 this
The mobile terminal of inventive embodiments, including：The card interface that is sequentially connected, testing circuit, central processing unit.
Wherein, described card interface is provided with deck, for connecting each pin of SIM, is provided with described card interface
VDD pin and VSS pin, described VDD pin is used for powering to SIM, and described VSS pin is used for SIM and is grounded, i.e. this
Bright only focus on VDD pin（The power supply foot of SIM）, VSS pin（The lower margin of SIM）Two pins, as shown in Figure 3；
Wherein, testing circuit, central processing unit, as shown in Figure 4；
Testing circuit is connected with VDD, VSS foot of card interface；Include inside described testing circuit：One feeder ear VLDO, one open
Pass and first resistor R, and an earth terminal, described switch is in parallel with described first resistor, and described feeder ear VLDO passes through described
Switch in parallel and first resistor R, connect to described VDD pin, described earth terminal is connected with described VSS pin；Switch by
The switch control unit of central processor controls；When switch control unit controlling switch disconnects, VDD pin passes through a 600M Ω
First resistor R be connected with feeder ear VLDO；When switch control unit controlling switch closes, VDD pin by with power supply
End VLDO is directly connected to, and first resistor R of 600M Ω there just is not effect；Described feeder ear VLDO is supply voltage, preferably
Ground, feeder ear VLDO is 1.8V.
Described central processing unit is connected with described testing circuit by GPIO foot, for when the mobile terminal-opening after, controlling
Described switch off, when SIM is not inserted into the deck of card interface, each foot of card interface is hanging, and the VDD pin of card interface passes through the
One resistance is connected with feeder ear VLDO, and VDD is pulled to high level；Be additionally operable to when have card insert deck, card interface each
Pin is contacted with each pin of SIM respectively；Resistance between SIM VDD pin and VSS foot is less than first resistor, VDD
Locate as low level；GPIO is detected to interrupt for low level, then judge SIM insertion is detected；Controlling switch closure is by supplying simultaneously
Electric end VLDO powers for SIM.
As shown in figure 4, including inside central processing unit：The switch control unit that is sequentially connected, interrupt detector unit, interruption
Dispensing unit；Described interruption detector unit is connected with described testing circuit and connects also by GPIO foot draws to the VDD of card interface
Foot；
Switch control unit is connected with the switch of described testing circuit, the closure for controlling switch or disconnection；
Interrupt GPIO pin in detector unit to be connected with the VDD pin of card interface, for detecting the interrupt signal on VDD pin；
Interrupt the interruption detection that dispensing unit is used for GP configuring IO, low level can be made into and interrupt it is also possible to be made in high level
Disconnected.
Card interface, testing circuit are described below, how unit works in central processing unit；
After mobile terminal-opening, controlling switch is disconnected by switch control unit, and interruption configuration of described dispensing unit GPIO is low level
Interrupt；When SIM is not inserted into deck, when that is, each foot of card interface is hanging, VDD pin passes through first resistor R and the confession of 600M Ω
Electric end VLDO is connected, and therefore, VDD is pulled to high level, will not produce low level interrupt signal at GPIO；
When there being card insertion deck, each pin of card interface is contacted with each pin of SIM respectively；And SIM VDD pin
Resistance and VSS foot between is much smaller than the 600M Ω of first resistor R, for low level at VDD；And GPIO interrupts for low level, because
This, interrupt detector unit and SIM insertion is just detected；Afterwards, during GPIO can be configured to not detect by interruption dispensing unit
Disconnected, controlling switch closure is powered for SIM by Simultaneous Switching control unit by feeder ear VLDO.
Parameters used in this programme are as follows：
Feeder ear VLDO, is the supply voltage of SIM, and when using SIM, feeder ear VLDO is connected with the VDD pin of SIM
Connect, it is preferred that feeder ear VLDO is 1.8V；
Under the non-power supply state of SIM, the resistance between SIM VDD pin and VSS foot is much smaller than 600M Ω, usually, SIM
Resistance between card VDD pin and VSS foot is about 60k Ω；
The internal 600 M Ω resistance of testing circuit in Fig. 4 need to be only that resistance value is big for preferred value it is also possible to select other resistances
In 10*Rds；Described Rds is the resistance value under the non-power supply state of SIM, between SIM VDD pin and VSS foot；As Fig. 4
In, according to Rds=60k Ω, when SIM inserts deck and switches off, at VDD（Namely at GPIO）Voltage is, typically
For be considered low level less than 10% of supply voltage, so GPIO will detect low level and interrupt.
Based on the operation principle of above-mentioned mobile terminal embodiment, include during the mobile terminal work of this mobile terminal embodiment
Following steps：
S10, controlling switch is disconnected by switch control unit, interrupts configuration of described dispensing unit GPIO and interrupts for low level；
S20, when interruption detector unit detects and produces low level interruption at GPIO, interrupting dispensing unit can be configured to GPIO
Do not detect interruption, controlling switch closure is powered for SIM by Simultaneous Switching control unit by VLDO.
Therefore, the mobile terminal of the embodiment of the present invention, can not affect in prior art, to realize mobile terminal to open
Change the purpose of SIM under machine state, the metal clips that SIM detection is used on deck in prior art can be removed simultaneously,
Reach the purpose reducing deck volume.
Based on above-mentioned mobile terminal embodiment, present invention also offers a kind of SIM inspection of base mobile terminal described above
Survey method, as shown in figure 5, methods described includes：
Step S100, setting one is used for detecting the GPIO pin of SIM insertion, GPIO pin will be examined when SIM is not inserted into
Measure high level, GPIO pin will detect low level when SIM inserts.
In the embodiment of the present invention, with reference to shown in Fig. 4, a GPIO is set（（Universal input/output））Pin, GPIO pin
It is connected with the card interface for grafting SIM.And the GPIO pin when SIM is not inserted into is set high level will be detected, work as SIM
During card insertion, GPIO pin will detect low level.
With reference to Fig. 4, by the switch control unit of central processing unit, controlling switch is disconnected, interrupt configuration of described dispensing unit
GPIO interrupts for low level.With specific reference to described in above-mentioned mobile terminal embodiment.
Step S200, in mobile terminal start-up course, arranges described GPIO and interrupts for trailing edge, and work as described decline
Think that SIM inserts when producing along interruption.
Step S300, under mobile terminal-opening state, if generation trailing edge interruption on GPIO is detected, is judged as
SIM inserts.
In the embodiment of the present invention, one GPIO of setting is used for detecting that SIM inserts, the GPIO pin when SIM is not inserted into
High level will be detected, GPIO pin will detect low level when SIM inserts；In mobile terminal start-up course, setting
Described GPIO interrupts for trailing edge, and thinks that when described trailing edge interrupts and producing SIM inserts；In mobile terminal-opening shape
Under state, if detect produced on GPIO when trailing edge interrupts it is believed that SIM inserts.Can not affect by this method
Realize in prior art under mobile terminal-opening state, changing the purpose of SIM.
When interruption detector unit detects and produces low level interruption at GPIO, interrupting dispensing unit can be configured to GPIO
Do not detect interruption, controlling switch closure is powered for SIM by Simultaneous Switching control unit by VLDO.
In sum, a kind of SIM detection method based on mobile terminal of the present invention and mobile terminal, methods described is passed through
One GPIO of setting is used for detecting that SIM inserts, GPIO pin will detect high level when SIM is not inserted into, when SIM is inserted
Fashionable GPIO pin will detect low level；In mobile terminal start-up course, described GPIO is set and interrupts for trailing edge, and
Think that when described trailing edge interrupts and producing SIM inserts；Under mobile terminal-opening state, if detect produced on GPIO
It is believed that SIM inserts when trailing edge interrupts.Can not affect to realize mobile terminal-opening in prior art by this method
Change the purpose of SIM under state, the metal clips that SIM detection is used on deck in prior art can be removed simultaneously, reach
To the purpose reducing deck volume.
Certainly, one of ordinary skill in the art will appreciate that realizing all or part of flow process in above-described embodiment method,
Can be by computer program to instruct related hardware（As processor, controller etc.）To complete, described program can store
In the storage medium of an embodied on computer readable, this program may include upon execution as the flow process of above-mentioned each method embodiment.Its
Described in storage medium can be memorizer, magnetic disc, CD etc..
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved according to the above description or to convert, all these modifications and variations all should belong to the guarantor of claims of the present invention
Shield scope.
Claims (7)
1. a kind of mobile terminal is it is characterised in that include：The card interface that is sequentially connected, testing circuit, central processing unit；
Described card interface is provided with deck, for connecting each pin of SIM, be provided with described card interface VDD pin and
VSS pin, described VDD pin is used for powering to SIM, and described VSS pin is used for SIM and is grounded；
Testing circuit is connected with VDD, VSS foot of card interface；Include inside described testing circuit：One feeder ear VLDO, one open
Close and a first resistor, an and earth terminal, described switch is in parallel with described first resistor, described feeder ear VLDO by described simultaneously
The switch of connection and first resistor, connect to described VDD pin, described earth terminal is connected with described VSS pin；
Described central processing unit is connected with described testing circuit by GPIO foot, described for when the mobile terminal-opening after, controlling
Switch off, when SIM is not inserted into the deck of card interface, each foot of card interface is hanging, the VDD pin of card interface passes through the first electricity
Resistance is connected with feeder ear VLDO, and VDD is pulled to high level；Being additionally operable to work as has card insertion deck, each pin of card interface
Contact with each pin of SIM respectively；Resistance between SIM VDD pin and VSS foot is less than first resistor, at VDD is
Low level；GPIO is detected to interrupt for low level, then judge SIM insertion is detected；Controlling switch closes by feeder ear simultaneously
VLDO powers for SIM.
2. mobile terminal according to claim 1 is it is characterised in that include inside described central processing unit：It is sequentially connected
Switch control unit, interrupt detector unit, interrupt dispensing unit；Described interruption detector unit is also by GPIO foot and described inspection
Slowdown monitoring circuit connects and connects to the VDD pin of card interface；
Switch control unit is connected with the switch of described testing circuit, the closure for controlling switch or disconnection；
Interrupt GPIO foot in detector unit to be connected with the VDD pin of card interface, for detecting the interrupt signal on VDD pin；
Interrupt the interruption detection that dispensing unit is used for GP configuring IO foot；
After mobile terminal-opening, controlling switch is disconnected by switch control unit, and interruption configuration of described dispensing unit GPIO is low level
Interrupt；When SIM is not inserted into the deck of card interface, each foot of card interface is hanging, and VDD pin passes through first resistor and feeder ear
VLDO is connected, and VDD is pulled to high level；
When there being card insertion deck, each pin of card interface is contacted with each pin of SIM respectively；SIM VDD pin with
Resistance between VSS foot is less than first resistor, for low level at VDD；And GPIO interrupts for low level, interrupting detector unit will
SIM insertion is detected；Interrupt dispensing unit and GPIO is configured to not detect interruption, control is opened by Simultaneous Switching control unit
Close closure to be powered for SIM by feeder ear VLDO.
3. mobile terminal according to claim 1 is it is characterised in that the resistance of described first resistor is more than 10*Rds；Institute
State the resistance value that Rds is under the non-power supply state of SIM, between SIM VDD foot and VSS foot.
4. mobile terminal according to claim 1 is it is characterised in that described first resistor is 600 M Ω, feeder ear VLDO
For 1.8V.
5. a kind of SIM detection method of mobile terminal described in any one based on claim 1-4 is it is characterised in that include：
A, setting one is used for detecting the GPIO pin of SIM insertion, and when SIM is not inserted into, GPIO pin will detect high electricity
Flat, when SIM inserts, GPIO pin will detect low level；
B, in mobile terminal start-up course, arranges described GPIO and interrupts for trailing edge, and when described trailing edge interrupts producing
When think SIM insert；
C, under mobile terminal-opening state, if generation trailing edge interruption on GPIO is detected, is judged as that SIM inserts.
6. according to claim 5 the SIM detection method based on mobile terminal it is characterised in that described step A is also wrapped
Include：
Controlling switch is disconnected by A1 by the switch control unit of central processing unit, and interruption configuration of described dispensing unit GPIO is low electricity
Flat interruption.
7. according to claim 5 the SIM detection method based on mobile terminal it is characterised in that described step C is also wrapped
Include：
C1, when interruption detector unit detects and produces low level interruption at GPIO, interrupting dispensing unit can be configured to GPIO
Do not detect interruption, controlling switch closure is powered for SIM by Simultaneous Switching control unit by VLDO.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610400950.2A CN106412152B (en) | 2016-06-08 | 2016-06-08 | A kind of SIM card detection method and mobile terminal based on mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610400950.2A CN106412152B (en) | 2016-06-08 | 2016-06-08 | A kind of SIM card detection method and mobile terminal based on mobile terminal |
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| CN106412152A true CN106412152A (en) | 2017-02-15 |
| CN106412152B CN106412152B (en) | 2019-04-30 |
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| CN108173560A (en) * | 2018-01-31 | 2018-06-15 | 维沃移动通信有限公司 | A kind of deck anti-static circuit and electronic equipment |
| CN109525017A (en) * | 2018-12-21 | 2019-03-26 | 惠州Tcl移动通信有限公司 | Charging circuit and electronic equipment |
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| CN109525017A (en) * | 2018-12-21 | 2019-03-26 | 惠州Tcl移动通信有限公司 | Charging circuit and electronic equipment |
| CN109525017B (en) * | 2018-12-21 | 2020-07-07 | 惠州Tcl移动通信有限公司 | Charging circuit and electronic device |
| CN110086491A (en) * | 2019-04-30 | 2019-08-02 | 北京智芯微电子科技有限公司 | SIM and eSIM hardware device for intelligently switching in telecommunication unit |
| CN111241023A (en) * | 2020-01-19 | 2020-06-05 | 惠州Tcl移动通信有限公司 | Insertion detection circuit and method of flash memory card, and electronic device |
| CN111241023B (en) * | 2020-01-19 | 2021-10-26 | 惠州Tcl移动通信有限公司 | Insertion detection circuit and method of flash memory card, and electronic device |
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| CN106412152B (en) | 2019-04-30 |
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Effective date of registration: 20201027 Address after: 6 building, No. 999, Lane 315100, sailing Road, hi tech Zone, Zhejiang, Ningbo, 5 Patentee after: TCL COMMUNICATION (NINGBO) Co.,Ltd. Address before: 10 building, No. 999, Lane 5, sailing Road, Ningbo hi tech Zone, Zhejiang, Ningbo, 315100 Patentee before: TCL mobile communication technology (Ningbo) Co.,Ltd. |