CN101478840A - SIM card control circuit for single-chip dual-mode mobile terminal and control method thereof - Google Patents
SIM card control circuit for single-chip dual-mode mobile terminal and control method thereof Download PDFInfo
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- CN101478840A CN101478840A CNA2009100454592A CN200910045459A CN101478840A CN 101478840 A CN101478840 A CN 101478840A CN A2009100454592 A CNA2009100454592 A CN A2009100454592A CN 200910045459 A CN200910045459 A CN 200910045459A CN 101478840 A CN101478840 A CN 101478840A
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Abstract
The invention discloses an SIM card control circuit of a single-chip dual-mode mobile terminal, which also comprises a virtual switch; a first power lead foot VCC of a first SIM card and a second power lead foot VCC of a second SIM card are respectively connected with the power lead foot VSIM of the SIM card controller; a first grounding lead foot GND of the first SIM card and a second grounding lead foot GND of the second SIM card are respectively connected with the grounding lead foot GND of the SIM card controller. The circuit and the method of the invention realizes automatically exclusive reading-writing of two SIM cards on the single-chip dual-mode mobile terminal under a set of SIM card control chips through employing some hardware devices and software control.
Description
Technical field
The present invention relates to SIM card, particularly a kind of SIM card control circuit and control method thereof of single-chip dual-mode mobile terminal.
Background technology
Along with the development of personal mobile communication technology, under high-end business people's drive, dual-mode handset has begun to become main flow.Dual-mode handset has satisfied some commercial occurrences in human life often goes on business, and uses the demand of many cards in different regions simultaneously; Also satisfy the white collar occurrences in human life and wished private telephone and company talk-back are separately used the demand of two SIM cards; Simultaneously for some card rate from different places the very situation of big-difference is arranged, use the different SIM card can cost saving, certain demand is also arranged, dual-mode handset have had very big market under these demands.
Dual-mode handset generally all is to use two cover individual chips in the market, and promptly radio frequency, CPU, peripheral components and power supply etc. all are independently, handle the network and the information of two SIM card respectively.This scheme realizes that cost is higher easily.
We have developed the scheme of another dual-mode handset at present, just are to use a cover chip, and by time-division processing, the method for software control is handled the network and the information of two SIM card.This a kind of scheme realizes difficult, and cost is lower.In the single-chip GSM/GSM mode mobile terminal, the SIM card controller has only a cover, but will communicate two SIM card when two standby, how to use a cover SIM card controller to operate two SIM card simultaneously, and solves the collision problem in this process.In addition, upper layer software (applications) may be operated SIM card continually, how to realize that automatically SIM switches, and communicating by letter by the SIM card of requirement of upper layer software (applications) ground and appointment also is the problem that will solve.
In a kind of scheme in back, the control of SIM card is a difficult point, because a cover GSM chip has only a SIM card controller, can't communicate by letter with two SIM card.The scheme that may consider is on a cover GSM single-chip, increases a SIM card controller, and communication interfaces such as CPU use I2C are communicated by letter with this SIM card controller, are implemented on the single-chip and communicate by letter with two SIM card.But like this,, the cell phone software complexity is strengthened owing to want communicating by letter of Controlled CPU and SIM card controller; Increase the SIM card controller and will add chip, increased the complexity of cost and circuit.
Summary of the invention
For overcoming the deficiency of above-mentioned prior art, the technical problem to be solved in the present invention provides a kind of SIM card control circuit and control method thereof of single-chip dual-mode mobile terminal.Thereby realized situation at a cover SIM card controller, can mutual exclusion carry out two SIM card communications, and according to the needs of upper layer module two SIM cards that can automatically switch.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of SIM card control circuit of single-chip dual-mode mobile terminal comprises GPIO mouth, SIM card controller, first SIM card, second SIM card of baseband processor,
This first SIM card comprises the first power pins VCC, the first grounding pin GND, the first reset pin RST, the first data pin IO, the first clock pin CLK;
This second SIM card comprises second source pin VCC, the second grounding pin GND, the second reset pin RST, the second data pin IO, second clock pin CLK;
This SIM card control circuit also comprises analog switch,
The first power pins VCC of described first SIM card and the second source pin VCC of described second SIM card link to each other with the power pins VSIM of described SIM card controller respectively, first grounding pin GND of described first SIM card and the second grounding pin GND of second SIM card link to each other with the grounding pin GND of described SIM card controller respectively
The reset pin SimRst of the direct and described SIM card controller of the first reset pin RST of described first SIM card links to each other, and the pin G_RST of the direct GPIO mouth with described baseband processor of the second reset pin RST of described second SIM card links to each other,
The pin G_SEL of the GPIO mouth of described baseband processor links to each other with described analog switch, still is the second SIM card end conducting with the first SIM card end conducting of controlling this analog switch;
The first clock pin CLK of described first SIM card links to each other with the clock pin simClk of described SIM card controller by described analog switch, the first data pin IO of described first SIM card links to each other by the data pin simDa of described analog switch with described SIM card controller
The second clock pin CLK of described second SIM card links to each other with the clock pin simClk of described SIM card controller by described analog switch, and the second data pin IO of described second SIM card links to each other by the data pin simDa of described analog switch with described SIM card controller.
Described analog switch is the two switches of putting of hilted broadsword.
A kind of SIM card control method of single-chip dual-mode mobile terminal, this method may further comprise the steps: the reset operation of step (1) two SIM card may further comprise the steps:
The GPIO mouth of (1.01) initialization baseband processor;
(1.02) according to current parameter S IM ID switching analoging switch, it is the information of which SIM card that this parameter S IM ID is used to distinguish;
(1.03), change step 1.05 if current parameter S IM ID is first SIM card; Otherwise, change step 1.04;
(1.04) the pin G_RST with described baseband processor GPIO mouth is changed to low level, changes step 1.05;
(1.05) the data pin simDa of the described SIM card controller of operation;
(1.06) according to reset model selection voltage;
(1.07) time-delay;
(1.08), change step 1.10 if current parameter S IM ID is first SIM card; Otherwise, change step 1.09;
(1.09) the pin G_RST with described baseband processor GPIO mouth is changed to high level, changes step 1.10;
(1.10) finish;
The handover operation of step (2) two SIM cards may further comprise the steps:
(2.01) if current SIM card is changeed step 2.13, if not, step 2.02 changeed;
(2.02) if current SIM card activates, change step 2.03; If not, change step 2.04;
(2.03) putting current SIM card is holding state, changes step 2.04;
(2.04) if first SIM card is handled commentaries on classics step 2.05, otherwise commentaries on classics step 2.06;
(2.05) the register Backup Data of first SIM card is copied to the first data pin IO of first SIM card, change step 2.07;
(2.06) the register Backup Data of second SIM card is copied to the second data pin IO of second SIM card, change step 2.07;
(2.07) switching analoging switch is to the SIM card of current correspondence;
(2.08) SIM card that a global variable writes down work at present is set;
(2.09) begin to operate the data pin IO of the SIM card of work at present, finish the work that needs;
(2.10) SIM card of waiting for work at present is responded;
(2.11) data of the data pin IO of the SIM card of work at present are copied to the backup of current SIM card;
(2.12) by current sim card, the notice upper layer software (applications);
(2.13) finish.
Compared with prior art, the invention has the beneficial effects as follows:
The SIM card control circuit of single-chip dual-mode mobile terminal of the present invention has solved under the situation of using a cover GSM chip, does not add new SIM card controller, only increases peripheral components seldom, just realizes and can be efficiently and control two SIM card reliably.Use the device number thereby effectively reduce, reduce cost.
The SIM card control method of single-chip dual-mode mobile terminal of the present invention, interface in the time of can allowing the upper strata control module not change the single SIM card of original operation, increasing just that a sign indicates is to the operation of which SIM card, just can with the same work originally, thereby the minimizing software complexity.
Circuit of the present invention and method are by using some hardware devices and software control, in two automatic exclusive read/writes of SIM card that are implemented on the single-chip dual-mode mobile terminal under the cover SIM card control chip.
Description of drawings
Fig. 1 is a SIM card control circuit schematic diagram of the present invention.
Fig. 2 is the different flow chart that resets of two SIM card of the present invention.
The flow chart that Fig. 3 switches for SIM card of the present invention.
Embodiment
Specific embodiments of the present invention are further described in detail below in conjunction with drawings and Examples, but should not limit protection scope of the present invention with this.
This method need interdependent in integral body cell phone software and hardware in realize.
The hardware circuit of the dual-mode handset of single-chip roughly comprises following components at present:
1, baseband circuit comprises CPU, general programmable input/output port (General Programmable Input Output is called for short GPIO), signal processor (being called for short DSP);
2, radio frequency part comprises antenna, rf control unit, power amplifier etc.;
3, power management comprises that live part, linear voltage regulator LDO and various voltage provide part;
4, internal memory (being called for short memory) management comprises flash or nand flash control;
5, audio frequency (being called for short AUDIO) management comprises loud speaker, earphone, Mike;
6, peripheral interface, keyboard, multimedia control, display part;
7, SIM card control.
The enforcement of this method hardware components mainly is the circuit part of the SIM card control in above-mentioned hardware systems, has used the GPIO of baseband portion simultaneously.
The control module of the dual-mode handset of single-chip roughly comprises at present:
1, agreement ground floor L1 comprises the DSP control module;
2, protocol stack module comprises the SIM card interface module, the RRM module, and the task management module is used to finish mobile phone identification and mobile management, short message service administration module, Call Control Block etc.;
3, driver module comprises the multimedia chip control module, display control module, SIM control module, Keyboard Control module, peripheral interface control module etc.;
4, MMI module, i.e. human-computer interaction interface module.
The enforcement of the inventive method mainly is the SIM card control module of driver module in the above-mentioned hierarchy of control, will revise the SIM card interface module in the protocol stack module simultaneously, and other parts do not need to revise.
Seeing also Fig. 1 is SIM card control circuit schematic diagram of the present invention.
The SIM card control circuit of single-chip dual-mode mobile terminal of the present invention comprises GPIO mouth, SIM card controller, first SIM card, second SIM card of baseband processor,
This first SIM card comprises the first power pins VCC, the first grounding pin GND, the first reset pin RST, the first data pin IO, the first clock pin CLK;
This second SIM card comprises second source pin VCC, the second grounding pin GND, the second reset pin RST, the second data pin IO, second clock pin CLK.
This SIM card control circuit also comprises analog switch,
The first power pins VCC of described first SIM card and the second source pin VCC of described second SIM card link to each other with the power pins VSIM of described SIM card controller respectively, first grounding pin GND of described first SIM card and the second grounding pin GND of second SIM card link to each other with the grounding pin GND of described SIM card controller respectively
The reset pin SimRst of the direct and described SIM card controller of the first reset pin RST of described first SIM card links to each other, and the pin G_RST of the direct GPIO mouth with described baseband processor of the second reset pin RST of described second SIM card links to each other,
The pin G_SEL of the GPIO mouth of described baseband processor links to each other with described analog switch, still is the second SIM card end conducting with the first SIM card end conducting of controlling this analog switch;
The first clock pin CLK of described first SIM card links to each other with the clock pin simClk of described SIM card controller by described analog switch, the first data pin IO of described first SIM card links to each other by the data pin simDa of described analog switch with described SIM card controller
The second clock pin CLK of described second SIM card links to each other with the clock pin simClk of described SIM card controller by described analog switch, and the second data pin IO of described second SIM card links to each other by the data pin simDa of described analog switch with described SIM card controller.
Described analog switch is the two switches of putting of hilted broadsword.
See also the different flow chart that resets of two SIM card of Fig. 2 the present invention.
Resetting of two SIM card successively carried out, first SIM card that directly connects the SIM controller for reset pin, data pin simDa by operation SIM controller realizes, for second SIM card that reset pin is connected with the GPIO mouth of baseband processor, finish by the input voltage of control GPIO mouth.
The SIM card control method of a kind of single-chip dual-mode mobile terminal of the present invention may further comprise the steps: the reset operation of step (1) two SIM card may further comprise the steps:
The GPIO mouth of (1.01) initialization baseband processor;
(1.02) according to current parameter S IM ID switching analoging switch, it is the information of which SIM card that this parameter S IMID is used to distinguish;
(1.03), change step 1.05 if current parameter S IM ID is first SIM card; Otherwise, change step 1.04;
(1.04) the pin G_RST with described baseband processor GPIO mouth is changed to low level, changes step 1.05;
(1.05) the data pin simDa of the described SIM card controller of operation;
(1.06) according to reset model selection voltage;
(1.07) time-delay;
(1.08), change step 1.10 if current parameter S IM ID is first SIM card; Otherwise, change step 1.09;
(1.09) the pin G_RST with described baseband processor GPIO mouth is changed to high level, changes step 1.10;
(1.10) finish;
See also the flow chart that Fig. 3 SIM card of the present invention is switched.
When SIM card was operated, main action was the SIM card that will operate according to the upper strata control module, and the switching hilted broadsword is two puts switch on the SIM card of correspondence, utilizes the existing SIM card controller of system then, the operation SIM card.Because when the different SIM card was operated, the state of SIM card controller, action sequence etc. had difference, according to circumstances to the register of SIM card controller be preserved, when switching SIM card, content of registers also will be switched.Simultaneously, the different SIM information of corresponding preservation all will be distinguished two SIM card.
The handover operation of step (2) two SIM cards may further comprise the steps:
(2.01) if current SIM card is changeed step 2.13, if not, step 2.02 changeed;
(2.02) if current SIM card activates, change step 2.03; If not, change step 2.04;
(2.03) putting current SIM card is holding state, changes step 2.04;
(2.04) if first SIM card is handled commentaries on classics step 2.05, otherwise commentaries on classics step 2.06;
(2.05) the register Backup Data of first SIM card is copied to the first data pin IO of first SIM card, change step 2.07;
(2.06) the register Backup Data of second SIM card is copied to the second data pin IO of second SIM card, change step 2.07;
(2.07) switching analoging switch is to the SIM card of current correspondence;
(2.08) SIM card that a global variable writes down work at present is set;
(2.09) begin to operate the data pin IO of the SIM card of work at present, finish the work that needs;
(2.10) SIM card of waiting for work at present is responded;
(2.11) data of the data pin IO of the SIM card of work at present are copied to the backup of current SIM card;
(2.12) by current sim card, the notice upper layer software (applications);
(2.13) finish.
The above is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application claim change and modification, all should be technology category of the present invention.
Claims (3)
1, a kind of SIM card control circuit of single-chip dual-mode mobile terminal comprises GPIO mouth, SIM card controller, first SIM card, second SIM card of baseband processor,
This first SIM card comprises the first power pins VCC, the first grounding pin GND, the first reset pin RST, the first data pin IO, the first clock pin CLK;
This second SIM card comprises second source pin VCC, the second grounding pin GND, the second reset pin RST, the second data pin IO, second clock pin CLK;
It is characterized in that:
This SIM card control circuit also comprises analog switch,
The first power pins VCC of described first SIM card and the second source pin VCC of described second SIM card link to each other with the power pins VSIM of described SIM card controller respectively, first grounding pin GND of described first SIM card and the second grounding pin GND of second SIM card link to each other with the grounding pin GND of described SIM card controller respectively
The reset pin SimRst of the direct and described SIM card controller of the first reset pin RST of described first SIM card links to each other, and the pin G_RST of the direct GPIO mouth with described baseband processor of the second reset pin RST of described second SIM card links to each other,
The pin G_SEL of the GPIO mouth of described baseband processor links to each other with described analog switch, still is the second SIM card end conducting with the first SIM card end conducting of controlling this analog switch;
The first clock pin CLK of described first SIM card links to each other with the clock pin simClk of described SIM card controller by described analog switch, the first data pin IO of described first SIM card links to each other by the data pin simDa of described analog switch with described SIM card controller
The second clock pin CLK of described second SIM card links to each other with the clock pin simClk of described SIM card controller by described analog switch, and the second data pin IO of described second SIM card links to each other by the data pin simDa of described analog switch with described SIM card controller.
2, SIM card control circuit according to claim 1 is characterized in that: described analog switch is the two switches of putting of hilted broadsword.
3, a kind of SIM card control method of single-chip dual-mode mobile terminal is characterized in that this method may further comprise the steps:
The reset operation of step (1) two SIM card may further comprise the steps:
The GPIO mouth of (1.01) initialization baseband processor;
(1.02) according to current parameter S IM ID switching analoging switch, it is the information of which SIM card that this parameter S IM ID is used to distinguish;
(1.03), change step 1.05 if current parameter S IMID is first SIM card; Otherwise, change step 1.04;
(1.04) the pin G_RST with described baseband processor GPIO mouth is changed to low level, changes step 1.05;
(1.05) the data pin simDa of the described SIM card controller of operation;
(1.06) according to reset model selection voltage;
(1.07) time-delay;
(1.08), change step 1.10 if current parameter S IM ID is first SIM card; Otherwise, change step 1.09;
(1.09) the pin G_RST with described baseband processor GPIO mouth is changed to high level, changes step 1.10;
(1.10) finish;
The handover operation of step (2) two SIM cards may further comprise the steps:
(2.01) if current SIM card is changeed step 2.13, if not, step 2.02 changeed;
(2.02) if current SIM card activates, change step 2.03; If not, change step 2.04;
(2.03) putting current SIM card is holding state, changes step 2.04;
(2.04) if first SIM card is handled commentaries on classics step 2.05, otherwise commentaries on classics step 2.06;
(2.05) the register Backup Data of first SIM card is copied to the first data pin IO of first SIM card, change step 2.07;
(2.06) the register Backup Data of second SIM card is copied to the second data pin IO of second SIM card, change step 2.07;
(2.07) switching analoging switch is to the SIM card of current correspondence;
(2.08) SIM card that a global variable writes down work at present is set;
(2.09) begin to operate the data pin IO of the SIM card of work at present, finish the work that needs;
(2.10) SIM card of waiting for work at present is responded;
(2.11) data of the data pin IO of the SIM card of work at present are copied to the backup of current SIM card;
(2.12) by current sim card, the notice upper layer software (applications);
(2.13) finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100454592A CN101478840B (en) | 2009-01-16 | 2009-01-16 | SIM card control circuit for single-chip dual-mode mobile terminal |
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| CN2009100454592A CN101478840B (en) | 2009-01-16 | 2009-01-16 | SIM card control circuit for single-chip dual-mode mobile terminal |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101969508A (en) * | 2010-10-21 | 2011-02-09 | 北京大友迅捷科技有限公司 | Method and device for implementing connection of wireless terminal and three SIM cards |
| CN102413592A (en) * | 2010-09-26 | 2012-04-11 | 中国移动通信有限公司 | User identification card, terminal and related processing method |
| CN104135757A (en) * | 2014-06-20 | 2014-11-05 | 北京创毅视讯科技有限公司 | Method and device of reducing power consumption of terminal as well as baseband chip |
| CN105451309A (en) * | 2014-06-30 | 2016-03-30 | 展讯通信（上海）有限公司 | SIM card control system and method |
| CN106488440A (en) * | 2016-12-21 | 2017-03-08 | 上海传英信息技术有限公司 | Mobile terminal and communication network method of attachment |
| CN111741150A (en) * | 2020-06-19 | 2020-10-02 | 展讯通信（上海）有限公司 | SIM card switching circuit, SIM card switching method and terminal equipment |
| US11153746B2 (en) * | 2012-09-27 | 2021-10-19 | Huawei Technologies Co., Ltd. | Method and terminal for keeping subscriber identity module card in standby state |
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| CN2726236Y (en) * | 2004-09-13 | 2005-09-14 | 张贵洲 | Double mode card for cell phone |
| CN101005657B (en) * | 2006-01-18 | 2010-05-26 | 英华达（南京）科技有限公司 | Intelligent identifying circuit for double mode mobile phone |
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| CN102413592A (en) * | 2010-09-26 | 2012-04-11 | 中国移动通信有限公司 | User identification card, terminal and related processing method |
| CN102413592B (en) * | 2010-09-26 | 2014-11-05 | 中国移动通信有限公司 | User identification card, terminal and related processing method |
| CN101969508A (en) * | 2010-10-21 | 2011-02-09 | 北京大友迅捷科技有限公司 | Method and device for implementing connection of wireless terminal and three SIM cards |
| US11153746B2 (en) * | 2012-09-27 | 2021-10-19 | Huawei Technologies Co., Ltd. | Method and terminal for keeping subscriber identity module card in standby state |
| US12028934B2 (en) | 2012-09-27 | 2024-07-02 | Huawei Technologies Co., Ltd. | Method and terminal for keeping subscriber identity module card in standby state |
| CN104135757A (en) * | 2014-06-20 | 2014-11-05 | 北京创毅视讯科技有限公司 | Method and device of reducing power consumption of terminal as well as baseband chip |
| CN105451309A (en) * | 2014-06-30 | 2016-03-30 | 展讯通信（上海）有限公司 | SIM card control system and method |
| CN106488440A (en) * | 2016-12-21 | 2017-03-08 | 上海传英信息技术有限公司 | Mobile terminal and communication network method of attachment |
| CN111741150A (en) * | 2020-06-19 | 2020-10-02 | 展讯通信（上海）有限公司 | SIM card switching circuit, SIM card switching method and terminal equipment |
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| CN101478840B (en) | 2010-09-29 |
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