CN107612571A - Terminal and its control circuit of multipurpose Kato, prevent SIM card from burning the method for card - Google Patents
Terminal and its control circuit of multipurpose Kato, prevent SIM card from burning the method for card Download PDFInfo
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- CN107612571A CN107612571A CN201710695640.2A CN201710695640A CN107612571A CN 107612571 A CN107612571 A CN 107612571A CN 201710695640 A CN201710695640 A CN 201710695640A CN 107612571 A CN107612571 A CN 107612571A
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- pin
- kato
- multipurpose
- card
- supply unit
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Abstract
The present invention discloses a kind of control circuit of terminal and its multipurpose Kato, prevents SIM card from burning the method for card.The energization pins and detecting pin of multipurpose Kato are connected to the output pin of power supply unit and the interrupt pin of processor, pin connection grounding pin is detected in the fully-inserted neck of multipurpose Kato, processor detects the first signal from detecting pin, and power supply unit is powered to multipurpose Kato；Detect pin when multipurpose Kato is not fully inserted into neck to disconnect with grounding pin, processor detects secondary signal from detecting pin, and power supply unit stops powering to multipurpose Kato.The present invention solves the problems, such as occur burning card during SIM card is plugged.
Description
Technical field
The present invention relates to technical field of electronic equipment, and in particular to a kind of control circuit of terminal and its multipurpose Kato,
Prevent SIM card from burning the method for card.
Background technology
Currently, the terminal such as mobile phone is widely used (Subscriber Identification Module, uses SIM card
Family identification card) and SD card (Secret Card, safe memory card) be integrated into the design of a neck, i.e. SIM card and SD card
It can simultaneously be carried on a Kato (multipurpose Kato), and be limited to the shape design of existing SD card and SIM card, SD card one
As be carried on the outermost deck of Kato (also known as SD card deck), accordingly, the SD card screens for being provided with shell fragment also is located at card
The outermost of groove.During Kato plugs, SIM card is readily accessible the shell fragment of SD card screens, if now SD card card
Position does not power off, then the voltage of supply SD card can be transferred to SIM card by shell fragment originally, and the operating voltage of SD card is 3V, far
Higher than the operating voltage 1.8V of SIM card, easily SIM card is caused to be burnt.
The content of the invention
In consideration of it, the present invention provides the control circuit of a kind of terminal and its multipurpose Kato, prevents SIM card from burning the side of card
Method, solve the problems, such as occur burning card during SIM card is plugged.
The control circuit of the multipurpose Kato of one embodiment of the invention, the multipurpose Kato can carry simultaneously SIM card and
SD card, the control circuit include the processor and power supply unit being connected, and the output pin of power supply unit is multi-purpose for connecting
The energization pins of way Kato, the interrupt pin of processor are used for the detecting pin for connecting multipurpose Kato, wherein, multipurpose Kato
Pin connection grounding pin is detected during fully-inserted neck, processor detects the first signal, processor control from detecting pin
Power supply unit is powered to multipurpose Kato；Multipurpose Kato is detected pin and disconnected with grounding pin when being not fully inserted into neck, place
Reason device detects secondary signal from detecting pin, and processor control power supply unit stops powering to multipurpose Kato.
Alternatively, the control circuit also includes resistance and interface power, and one end of resistance is connected to detecting pin with
Between disconnected pin, the other end of resistance is connected to interface power.
Alternatively, the detecting pin is open type switch, and first signal is low level signal, the secondary signal
For high level signal.
Alternatively, the detecting pin is normally closed switch, and first signal is high level signal, the secondary signal
For low level signal.
Alternatively, the control circuit also includes electric capacity, and a battery lead plate of the electric capacity is connected to output pin and confession
Between electric unit, another electrode plate earthing of the electric capacity.
The terminal of one embodiment of the invention, including the multipurpose Kato of SIM card and SD card can be carried simultaneously, and above-mentioned control
Circuit processed.
One embodiment of the invention prevents SIM card from burning the method for card, and it is multi-purpose that the SIM card and SD card can be carried on one simultaneously
On the Kato of way, methods described includes：
The energization pins of multipurpose Kato are connected to the output pin of a power supply unit, and detecing multipurpose Kato
The interrupt pin that pin is connected to a processor is surveyed, wherein processor is connected with power supply unit；
Pin connection grounding pin is detected in the fully-inserted neck of multipurpose Kato, processor detects from detecting pin
First signal, and control power supply unit to be powered to multipurpose Kato；
Detect pin when multipurpose Kato is not fully inserted into neck to disconnect with grounding pin, processor is examined from detecting pin
Secondary signal is measured, and controls power supply unit to stop powering to multipurpose Kato.
Alternatively, methods described also includes：
A resistance is connected between detecting pin and interrupt pin, one end of the resistance is connected to detecting pin and interruption
Between pin, the other end of the resistance is connected to interface power.
Alternatively, the detecting pin is open type switch, and first signal is low level signal, the secondary signal
For high level signal；Or the detecting pin is normally closed switch, first signal is high level signal, described second
Signal is low level signal.
Alternatively, methods described also includes：
An electric capacity is connected between output pin and said supply unit, a battery lead plate of the electric capacity is connected to output
Between pin and power supply unit, another electrode plate earthing of the electric capacity.
Beneficial effect：The present invention design multipurpose Kato energization pins and detecting pin be connected to power supply unit and
Processor, pin ground connection is detected in the fully-inserted neck of multipurpose Kato, processor detects the first signal from detecting pin,
Power supply unit is powered to multipurpose Kato, and when multipurpose Kato is not fully inserted into neck, detecting pin is unearthed, processor
Secondary signal is detected from detecting pin, power supply unit stops powering to multipurpose Kato, that is to say, that the present invention passes through detecting
The signal intensity of pin detects the plug of multipurpose Kato, and to stop when detecting that multipurpose Kato is plugged be multipurpose
Kato is powered, and enables to SD card screens to power off, so as to solve the problems, such as to occur burning card during SIM card is plugged.
Brief description of the drawings
Fig. 1 is the structural representation of the multipurpose Kato of one embodiment of the invention；
Fig. 2 is the structural representation of the control circuit of the multipurpose Kato of one embodiment of the invention；
Fig. 3 is the schematic flow sheet of the method for preventing SIM card burning card of one embodiment of the invention.
Embodiment
The main object of the present invention is to detect multipurpose by detecting the signal intensity of the detecting pin of multipurpose Kato
Whether Kato is plugged, and stops powering for multipurpose Kato when detecting that multipurpose Kato is plugged, with this so that SD card
Screens powers off, so as to solve the problems, such as occur burning card during SIM card is plugged.In the present invention, the SD card of multipurpose Kato
Deck is located at the outermost of multipurpose Kato, for example, referring to Fig. 1, multipurpose Kato 10 includes SD card deck 11 and SIM card deck
12a, 12b, the structure and size design of two SIM card decks can be the same or different, and SD card deck 11 is located at multipurpose
The outermost of Kato 10, the SD card screens for accordingly, in terminal groove being provided with shell fragment also are located at the outermost of neck, SD card card
Seat 11 can cover SIM card deck 12a to be multiplexed Kato space, that is to say, that the SD when SIM card deck 12a carries SIM card
Card deck 11 can not carry SD card, and SIM card deck 12a can not carry SIM card when SD card deck 11 carries SD card.
With reference to the accompanying drawing in the embodiment of the present invention, to the technology of each exemplary embodiment provided by the present invention
Scheme is clearly and completely described.In the case where not conflicting, the technical characteristic in following embodiments and each embodiment
It can be mutually combined.
Referring to Fig. 2, the structural representation of the control circuit for one embodiment of the invention.The control circuit bag of the present embodiment
Processor 21 and power supply unit 22 are included, wherein, the CPU for the terminal that processor 21 can be applicable by multi-purpose card support 10
(Central Processing Unit, central processing unit), it can also be external CPU certainly, and power supply unit 22 can be
The PMU (Power Management Unit, PMU) of the terminal.
SPMI (the Serial Power Management of two-wire can be passed through between processor 21 and power supply unit 22
Interface, serial power-management interface) bus is communicatively coupled, for example, power supply unit 22 can pass through wherein one
The various control instructions that SPMI bus reception processings device 21 issues, and certain power supply output all the way is turned on and off according to control instruction
Pin, or the magnitude of voltage for certain being set power supply output pin being exported all the way, and power supply unit 22 can pass through another SPMI
Bus feeds back the status information of itself to processor 21.
The energization pins VMCH of multipurpose Kato 10 is connected to an output pin LDO of power supply unit 22.In order to protect
Circuit, such as power filter and pressure stabilization function are played, the present embodiment can set an electric capacity 23, a battery lead plate of the electric capacity 23
It is connected between energization pins VMCH and the output pin LDO of power supply unit 22, another electrode plate earthing of the electric capacity 23.
The detecting pin SD_DET of multipurpose Kato 10 is connected to an interrupt pin INT of processor 21.Detect pin
SD_DET is substantially a mechanical switch, so that open type switchs as an example, when multipurpose Kato 10 is not fully inserted into neck
Or when being not inserted into neck in multipurpose Kato 10, the detecting pin SD_DET and grounding pin GND in neck is to disconnect,
And when in 10 fully-inserted neck of multipurpose Kato, detecting pin SD_DET by multipurpose Kato 10 thrust, so as to card
Grounding pin GND connections in groove.
The interrupt pin INT of the present embodiment can be a GPIO (the General Purpose Input/ of processor 21
Output, the input and output of general-use) interface, detecting pin SD_DET level change can be detected by the GPIO interface
Change.
Specifically, detecting can be with the interface power of terminal between pin SD_DET and the interrupt pin INT of processor 21
IOVCC connections, thus, detecting pin SD_DET receive the electric signal from interface power IOVCC, and processor 21 can be detected and detectd
Survey pin SD_DET level change.For protection circuit, such as current-limiting protection effect is played, the present embodiment can set an electricity
Resistance 24, one end of the resistance 24 are connected between detecting pin SD_DET and interrupt pin INT, the other end connection of the resistance 24
In interface power IOVCC.
When multipurpose Kato 10 is in extraction state, the detecting pin SD_DET and grounding pin GND in neck is disconnected
Open, due to detecting pin SD_DET external interface power supply IOVCC, therefore processor 21 detects height from detecting pin SD_DET
Level signal, processor 21 judge that multipurpose Kato 10 is not fully inserted into neck, now SD card and SIM card not with neck
Shell fragment good contact, processor 21 control power supply unit 22 to stop powering to multipurpose Kato 10 so that SD card screens powers off, base
In this, subsequently during multipurpose Kato 10 inserts neck, even if SIM card is in contact with the shell fragment of SD card screens, also not
Voltage can be received from the shell fragment of SD card screens, be not in the problem of SIM card burns card.
When multipurpose Kato 10 is in the fully inserted this state of neck, SD card and SIM card respectively with the bullet in neck
Piece good contact, pin SD_DET is detected by the thrust of multipurpose Kato 10 and is connected with the grounding pin GND in neck, i.e.,
Pin SD_DET ground connection is detected, processor 21 detects low level signal from detecting pin SD_DET, judges multipurpose Kato 10
Do not plugged, then control power supply unit 22 to be powered by output pin LDO and energization pins VMCH to multipurpose Kato 10, SD
Card and SIM card receiving voltage simultaneously work.
When user by thimble press multipurpose Kato 10 when, multipurpose Kato 10 can be exited automatically from neck one section away from
From detecting pin SD_DET disconnects with the grounding pin GND in neck, and processor 21 detects high electricity from detecting pin SD_DET
Ordinary mail number, it is possible to determine that multipurpose Kato 10 is not fully inserted into neck, thus processor 21 control power supply unit 22 stop to
Multipurpose Kato 10 is powered so that SD card screens powers off.Wherein, card is burnt in order to ensure to occur without during SIM card is extracted
Problem, the present embodiment must assure that before SIM card contacts with the shell fragment of SD card screens processor 21 has been completed to detect pin
The detection of signal, the process for judging and controlling power supply unit 22 to stop SD card screens power supply at SD_DET, based on this, in view of
In normal person pulls out the actual scene of card, detect and high level signal is changed into SIM card letter from low level signal at pin SD_DET
The time average out to of this process number is contacted with the shell fragment of SD card screens 1 second, the present embodiment can be with optimized processor 21 and power supply
Communications between unit 22 so that processor 21 completes the detection of signal at detecting pin SD_DET, judges and control
Power supply unit 22 stops power time of this process of SD card screens and is less than 1 second, such as the present embodiment passes through said structure design
200 milliseconds are only needed to complete this process.
From the foregoing, the energization pins VMCH and detecting pin SD_DET difference of the present embodiment design multipurpose Kato 10
Power supply unit 22 and processor 21 are connected to, pin SD_DET ground connection, place are detected in multipurpose 10 fully-inserted neck of Kato
Reason device 21 detects the first signal (low level signal) from detecting pin SD_DET, and power supply unit 22 supplies to multipurpose Kato 10
Electricity, and it is unearthed to detect pin SD_DET when multipurpose Kato 10 is not fully inserted into neck, processor 21 is from detecting pin SD_
DET detects secondary signal (high level signal), and power supply unit 22 stops powering to multipurpose Kato 10.That is, this reality
Apply example and detect the plug of multipurpose Kato 10 by detecting pin SD_DET signal intensity, and detect multipurpose Kato
10 stop powering for multipurpose Kato 10 when being plugged, and enable to SD card screens to power off, are being plugged so as to solve SIM card
During occur burn card the problem of.
Based on above-mentioned principle, control circuit of the invention can also have other set-up modes, such as detecting pin SD_DET
It can be normally closed switch, in this, pin SD_DET and grounding pin GND is detected in multipurpose 10 fully-inserted neck of Kato
Disconnect, processor 21 is high level signal from the first signals for detecting of detecting pin SD_DET, and power supply unit 22 is to multipurpose
Kato 10 is powered, and pin SD_DET connection grounding pin GND are detected when multipurpose Kato 10 is not fully inserted into neck, processing
Device 21 is low level signal from the detecting pin SD_DET secondary signals detected, and power supply unit 22 stops to multipurpose Kato 10
Power supply.
The present invention also provides the terminal of an embodiment, and the terminal not only includes carrying the multi-purpose of SIM card and SD card simultaneously
Way Kato, such as multipurpose Kato shown in Fig. 1 10, in addition to the control circuit shown in Fig. 2, therefore the terminal is also with foregoing
Beneficial effect.
Referring to Fig. 3, prevent SIM card from burning the schematic flow sheet of the method for card for one embodiment of the invention.The present embodiment
Prevent SIM card burn card method include step S31~S33.
S31：The energization pins of multipurpose Kato are connected to the output pin of a power supply unit, and by multipurpose Kato
Detecting pin be connected to the interrupt pin of a processor, wherein processor is connected with power supply unit.
S32：Pin connection grounding pin is detected in the fully-inserted neck of multipurpose Kato, processor is examined from detecting pin
The first signal is measured, and controls power supply unit to be powered to multipurpose Kato.
S33：Detect pin when multipurpose Kato is not fully inserted into neck to disconnect with grounding pin, processor draws from detecting
Pin detects secondary signal, and controls power supply unit to stop powering to multipurpose Kato.
The processor 21 and power supply unit 22 of the responsible the various embodiments described above control circuit of method of the present embodiment, its principle
It see above-mentioned, therefore there is same beneficial effect.
It should be understood that the foregoing is only embodiments of the invention, it is not intended to limit the scope of the invention, every profit
The equivalent structure or equivalent flow conversion made with description of the invention and accompanying drawing content, such as technical characteristic between each embodiment
Be combined with each other, or be directly or indirectly used in other related technical areas, be similarly included in the patent protection of the present invention
In the range of.
Claims (10)
1. a kind of control circuit of multipurpose Kato, the multipurpose Kato can carry SIM card and SD card simultaneously, its feature exists
In the control circuit includes the processor and power supply unit being connected, and the output pin of said supply unit is used to connect institute
The energization pins of multipurpose Kato are stated, the interrupt pin of the processor is used for the detecting pin for connecting the multipurpose Kato,
Wherein, the detecting pin connection grounding pin, the processor are detectd from described during the multipurpose Kato fully-inserted neck
Survey pin and detect the first signal, the processor control said supply unit is powered to the multipurpose Kato；It is described multi-purpose
Way Kato is not fully inserted into detecting pin and the grounding pin during neck and disconnected, and the processor is from the detecting pin
Secondary signal is detected, the processor control said supply unit stops powering to the multipurpose Kato.
2. control circuit according to claim 1, it is characterised in that the control circuit also includes resistance and interface electricity
Source, one end of the resistance are connected between the detecting pin and the interrupt pin, and the other end of the resistance is connected to
The interface power.
3. control circuit according to claim 2, it is characterised in that the detecting pin is open type switch, described the
One signal is low level signal, and the secondary signal is high level signal.
4. control circuit according to claim 2, it is characterised in that the detecting pin is normally closed switch, described the
One signal is high level signal, and the secondary signal is low level signal.
5. control circuit according to claim 1, it is characterised in that the control circuit also includes electric capacity, the electric capacity
A battery lead plate be connected between the output pin and said supply unit, another electrode plate earthing of the electric capacity.
6. a kind of terminal, including the multipurpose Kato of SIM card and SD card can be carried simultaneously, it is characterised in that the terminal is also wrapped
Include the control circuit as described in claim any one of 1-5.
7. a kind of method for preventing SIM card from burning card, the SIM card and SD card can be carried on a multipurpose Kato simultaneously, it is special
Sign is that methods described includes：
The energization pins of the multipurpose Kato are connected to the output pin of a power supply unit, and by the multipurpose Kato
Detecting pin be connected to the interrupt pin of a processor, wherein the processor is connected with said supply unit；
In the multipurpose Kato fully-inserted neck, the detecting pin connection grounding pin, the processor are detectd from described
Survey pin and detect the first signal, and control said supply unit to be powered to the multipurpose Kato；
When multipurpose Kato is not fully inserted into neck, detecting pin and the grounding pin disconnect, and the processor is from institute
State detecting pin and detect secondary signal, and control said supply unit to stop powering to the multipurpose Kato.
8. according to the method for claim 7, it is characterised in that methods described also includes：
Connect a resistance between the detecting pin and interrupt pin, one end of the resistance be connected to the detecting pin and
Between interrupt pin, the other end of the resistance is connected to interface power.
9. according to the method for claim 8, it is characterised in that the detecting pin switchs for open type, first letter
Number it is low level signal, the secondary signal is high level signal；
Or the detecting pin is normally closed switch, first signal is high level signal, and the secondary signal is low electricity
Ordinary mail number.
10. according to the method for claim 7, it is characterised in that methods described also includes：
Connect an electric capacity between the output pin and said supply unit, a battery lead plate of the electric capacity is connected to described
Between output pin and said supply unit, another electrode plate earthing of the electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710695640.2A CN107612571A (en) | 2017-08-14 | 2017-08-14 | Terminal and its control circuit of multipurpose Kato, prevent SIM card from burning the method for card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710695640.2A CN107612571A (en) | 2017-08-14 | 2017-08-14 | Terminal and its control circuit of multipurpose Kato, prevent SIM card from burning the method for card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107612571A true CN107612571A (en) | 2018-01-19 |
Family
ID=61065087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710695640.2A Withdrawn CN107612571A (en) | 2017-08-14 | 2017-08-14 | Terminal and its control circuit of multipurpose Kato, prevent SIM card from burning the method for card |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107612571A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108401043A (en) * | 2018-02-28 | 2018-08-14 | 上海与德科技有限公司 | Burn-out-proof card circuit, method and mobile terminal based on single-pole double-throw switch (SPDT) |
| CN109190745A (en) * | 2018-06-29 | 2019-01-11 | 努比亚技术有限公司 | It is a kind of to avoid burning control circuit, method, terminal and the computer storage medium blocked |
| CN110221673A (en) * | 2019-06-14 | 2019-09-10 | 广东虹勤通讯技术有限公司 | A kind of circuit to sparkle when notebook adapter being prevented to be inserted into and method |
-
2017
- 2017-08-14 CN CN201710695640.2A patent/CN107612571A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108401043A (en) * | 2018-02-28 | 2018-08-14 | 上海与德科技有限公司 | Burn-out-proof card circuit, method and mobile terminal based on single-pole double-throw switch (SPDT) |
| CN109190745A (en) * | 2018-06-29 | 2019-01-11 | 努比亚技术有限公司 | It is a kind of to avoid burning control circuit, method, terminal and the computer storage medium blocked |
| CN110221673A (en) * | 2019-06-14 | 2019-09-10 | 广东虹勤通讯技术有限公司 | A kind of circuit to sparkle when notebook adapter being prevented to be inserted into and method |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180119 |
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| WW01 | Invention patent application withdrawn after publication |