CN104182027A - NFC clock control device for mobile terminal, and method thereof - Google Patents
NFC clock control device for mobile terminal, and method thereof Download PDFInfo
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- CN104182027A CN104182027A CN201410399195.1A CN201410399195A CN104182027A CN 104182027 A CN104182027 A CN 104182027A CN 201410399195 A CN201410399195 A CN 201410399195A CN 104182027 A CN104182027 A CN 104182027A
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Abstract
The invention discloses an NFC clock control device for a mobile terminal, and a method thereof. The NFC clock control device comprises a main controller and an NFC chip, wherein the main controller is connected with the NFC chip and sends out a configuration order to the NFC chip so as to actuate the clock requesting mode of the NFC chip; the NFC chip sends out a corresponding clock requesting signal to the main controller according to the situation that whether a clock is needed or not; the main controller determines the order content of the clock requesting signal, and outputs or stops outputting an NFC clock to the NFC chip according to the order content. According to the NFC clock control device and the method thereof, as the output of the NFC clock is stopped when the NFC clock is not needed by the NFC chip, the power consumption after the NFC function is actuated is lowered and the electric power consumption is saved, and moreover, the NFC clock control device is simple in structure, capable of full-automatic control, convenient for energy consumption conservation, and suitable of wide popularization.
Description
Technical field
The present invention relates to the NFC application of mobile terminal, in particular a kind of NFC clock control device and method thereof of mobile terminal.
Background technology
Along with the development of mobile terminal technology, the function of mobile terminal is more and more.At present increasing mobile terminal is with NFC(Near Field Communication, near field communication (NFC)) function, can carry out wireless near field communication at mobile device, consumer electronics product and smart control Tool Room.NFC chip is connected with the main control chip of mobile terminal; NFC chip needs outside input clock, NFC clock in the time of work.
The NFC clock control mode adopting is at present to continue input NFC clock.In the time that user opens NFC function, main control chip control NFC clock is exported to NFC chip always; In the time that user closes NFC function, main control chip control NFC clock is closed.The shortcoming of this scheme is, needs only user and opens NFC function, and main control chip always continues output NFC clock; And user is while opening NFC function, in most cases NFC chip is not worked, in waiting status; And the NFC clock of now main control chip output is not used by NFC chip, cause the electric weight waste of NFC clock output module in main control chip, power consumption is higher.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, a kind of NFC clock control device and method thereof of mobile terminal are provided, be intended to solve existing mobile terminal NFC chip and also do not work and to continue output NFC clock, cause electric weight waste and the higher problem of power consumption of NFC clock output module.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A NFC clock control device for mobile terminal, it comprises master controller and NFC chip, described master controller connects NFC chip;
Master controller starts the clock request mode of NFC chip to NFC chip transmission configuration-direct, when whether NFC chip needs clock according to it, send corresponding clock request signal to master controller; Master controller judges the command content of described clock request signal, exports or stops exporting NFC clock to NFC chip according to command content.
In the NFC clock control device of described mobile terminal, described master controller comprises:
Data communication interface, for carrying out data communication with NFC chip, transmission configuration instruction is to NFC chip, and the clock request signal of reception NFC chip transmission;
Dispensing unit, for sending configuration-direct to NFC chip by data communication interface;
Clock request detection unit, for judging that the command content of clock request signal that NFC chip sends is the clock request of opening or clock turn-off request;
Clock control cell, for opening request output NFC clock according to clock to NFC chip, and stops exporting NFC clock to NFC chip according to clock turn-off request;
Described dispensing unit, data communication interface, clock request detection unit are connected successively with clock control cell, and described data communication interface, clock control cell connect NFC chip.
In the NFC clock control device of described mobile terminal, the model of described master controller is MSM8225, and the model of NFC chip is PN544; The I2CSCL pin of master controller, I2CSDA pin, BBCLK pin connect respectively IF3 pin, IF2 pin, the XTAL1 pin of NFC chip.
In the NFC clock control device of described mobile terminal, described configuration-direct is a string default data, for NFC chip configuration is become with data mode tranmitting data register request signal.
In the NFC clock control device of described mobile terminal, described master controller also comprises:
Detecting unit, for detection of the model of NFC chip, generates corresponding configuration-direct according to the model control dispensing unit of NFC chip;
Described detecting unit connects dispensing unit.
A NFC clock control method for mobile terminal, it comprises:
A, master controller start the clock request mode of NFC chip to NFC chip transmission configuration-direct;
When whether B, NFC chip need clock according to it, send corresponding clock request signal to master controller;
C, master controller judge the command content of described clock request signal, export or stop exporting NFC clock to NFC chip according to command content.
In described NFC clock control method, in described steps A, in the time of NFC chip enable, dispensing unit is sent configuration-direct and is started the clock request mode of NFC chip to NFC chip by data communication interface.
In described NFC clock control method, in described steps A, described configuration-direct is a string default data, for NFC chip configuration is become with data mode tranmitting data register request signal.
In described NFC clock control method, specifically comprise at described step C:
The command content of the clock request signal that C1, clock request detection unit resolves NFC chip send;
Whether C2, the command content that judges described clock request signal and the clock prestoring are opened request identical; The identical clock control cell output NFC clock of controlling is to NFC chip, and difference performs step C3;
C3, judge that whether the command content of described clock request signal is identical with the clock turn-off request prestoring, the identical clock control cell of controlling stops exporting NFC clock to NFC chip, and difference does not respond.
In described NFC clock control method, before described steps A, also comprise:
The model of A0, detection NFC chip, calls corresponding configuration-direct according to the model control dispensing unit of NFC chip.
Compared to prior art, NFC clock control device and the method thereof of mobile terminal provided by the invention, the clock request mode that starts NFC chip by master controller to NFC chip transmission configuration-direct, NFC chip sends corresponding clock request signal to master controller while whether needing clock according to it; Master controller judges the command content of described clock request signal, exports or stops exporting NFC clock to NFC chip according to command content; In the time that NFC chip does not need NFC clock, stop NFC clock output, reduced the power consumption after NFC function is opened, save power consumption, it is simple in structure, full automation control, facilitate energy consumption to save, be applicable to wideling popularize.
Brief description of the drawings
Fig. 1 is the structural drawing of the NFC clock control device of mobile terminal provided by the invention.
Fig. 2 is the detection method process flow diagram of the mainboard type of mobile terminal provided by the invention.
Fig. 3 is the schematic diagram of NFC clock control device one Application Example of mobile terminal provided by the invention.
Embodiment
The invention provides a kind of NFC clock control device and method thereof of mobile terminal, for making object of the present invention, technical scheme and advantage clearer, clear and definite, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
After the present invention is directed to existing mobile terminal unlatching NFC function, the lasting output of NFC clock causes the problem that power consumption is higher, exports or stops exporting NFC clock according to the actual demand of NFC chip, to reduce NFC power consumption, saves electric energy.Refer to Fig. 1, the NFC clock control device of described mobile terminal comprises master controller 100 and NFC chip 200, and described master controller 100 connects NFC chip 200.Master controller 100 sends configuration-direct and starts the clock request mode of NFC chip 200 to NFC chip 200, NFC chip 200 sends corresponding clock request signal to master controller 100 while whether needing clock according to it; Master controller 100 judges the command content of described clock request signal, exports or stops exporting NFC clock to NFC chip 200 according to command content.
It will be appreciated that, described master controller 100 also comprises other modules, as supply module, controls the switch module that NFC opens and closes, and the data of NFC chip transmission is carried out to the processor of relevant treatment etc.; It is prior art, does not make switch module herein and describes in detail.
Described master controller 100 comprises: data communication interface 110, dispensing unit 120, clock request detection unit 130 and clock control cell 140.Described dispensing unit 120, data communication interface 110, clock request detection unit 130 are connected successively with clock control cell 140, and described data communication interface 110, clock control cell 140 connect NFC chip 200.
Data communication interface 110 is connected and is carried out data communication by some data communication line NFC chips, relates to transmission configuration instruction to NFC chip in the present embodiment, and receives the clock request signal that NFC chip sends.In the time that the switch module control NFC of master controller 100 chip is opened, dispensing unit 120 sends configuration-direct to NFC chip 200 by data communication interface.
Described configuration-direct is a string default data (as 0x8767890123456, writing in advance in dispensing unit 120 before dispatching from the factory according to the model of the NFC chip of installing) of deciding through consultation justice according to NFC chip factory.The duty that these data can be controlled the corresponding registers of NFC chip internal starts the clock request mode of NFC chip 200, and NFC chip 200 is configured to data mode tranmitting data register request signal.The command content of described clock request signal comprises the clock request of opening and clock turn-off request.That is to say, under clock request mode, whether NFC chip 200 can detect own current duty needs NFC clock, need to send NFC chip factory and decide through consultation that the request of opening of adopted clock (is a string predetermined data, as 0x1234567890123456001) to master controller 100, do not need NFC clock to send NFC chip factory and decide through consultation that adopted clock turn-off request (being also a string predetermined data, as 0x1234567890123456000) is to master controller 100.
Data communication interface 110 receives described clock request signal and is transferred to clock request detection unit 130.Described clock request detection unit 130 judges that the command content of the clock request signal that NFC chip 200 sends is the clock request of opening or clock turn-off request.Clock control cell 140 is opened request output NFC clock to NFC chip, if clock turn-off request stops exporting NFC clock to NFC chip according to clock.Like this, in the time that NFC chip does not need NFC clock, stop the output of NFC clock, reduced the power consumption after NFC function is opened, save power consumption; While needing NFC clock, export again NFC clock, NFC chip inputs or outputs related data after receiving NFC clock again, realize wireless near field communication, can not affect NFC chip operation, it is simple in structure, full automation control, facilitate energy consumption save, be applicable to wideling popularize.
In the specific implementation, the NFC chip based on different model, its internal register circuit structure may be different.If user's replacing or upgrading NFC chip cause its model change, user can and write dispensing unit 120 at configuration-direct corresponding to this model of locate line and store.The present embodiment detects the model of NFC chip by increase by a detecting unit in master controller 100, call corresponding configuration-direct according to the model control dispensing unit of NFC chip.
NFC clock control device based on above-mentioned mobile terminal, the present invention also provides a kind of NFC clock control method of mobile terminal, sees also Fig. 1 and 2, and as shown in Figure 2, it comprises described NFC clock control method:
S100, master controller start the clock request mode of NFC chip to NFC chip transmission configuration-direct;
When whether S200, NFC chip need clock according to it, send corresponding clock request signal to master controller;
S300, master controller judge the director data of described clock request signal, export or stop exporting NFC clock to NFC chip according to director data.
In described step S100, in the time of NFC chip enable, dispensing unit is sent configuration-direct and is started the clock request mode of NFC chip to NFC chip by data communication interface, NFC chip 200 is configured to data mode tranmitting data register request signal.Under clock request mode, whether NFC chip 200 can detect own current duty needs NFC clock, need to send NFC chip factory and decide through consultation the adopted clock request of opening (as 0x1234567890123456001), do not need NFC clock to send NFC chip factory and decide through consultation adopted clock turn-off request (as 0x1234567890123456000), specifically as shown in above-described embodiment.
Data communication interface 110 receives described clock request signal and is transferred to clock request detection unit 130 and carries out correlated judgment.Described step S300 specifically comprises:
The command content of the clock request signal that step 31, clock request detection unit resolves NFC chip send;
Whether step 32, the command content that judges described clock request signal and the clock prestoring are opened request identical; The identical clock control cell output NFC clock of controlling is to NFC chip, and difference performs step C3;
Step 33, judge that whether the command content of described clock request signal is identical with the clock turn-off request prestoring, the identical clock control cell of controlling stops exporting NFC clock to NFC chip, and difference does not respond.Specifically as shown in above-described embodiment.
NFC chip based on different model, its internal register circuit structure may be different.If user's replacing or upgrading NFC chip cause its model change, before described step S100, the present embodiment can also first detect the model of NFC chip, calls corresponding configuration-direct, according to the model control dispensing unit of NFC chip specifically as shown in above-described embodiment.
Please refer to Fig. 3, in a preferred embodiment, the model of master controller 100 is MSM8225, and the model of NFC chip 200 is PN544; The I2CSCL pin of master controller 100, I2CSDA pin, BBCLK pin connect respectively IF3 pin, IF2 pin, the XTAL1 pin of NFC chip 200.Wherein, described I2CSCL pin, I2CSDA pin belong to data communication interface, for realizing the data communication between NFC chip.Described BBCLK pin belongs to clock control cell, for exporting or stopping exporting NFC clock to NFC chip.The GPIO1 pin of described master controller 100 connects the VEN pin of NFC chip, and GPIO1 pin belongs to switch module, opens or closes for controlling NFC chip.
Dispensing unit sends configuration-direct 0x8767890123456 by data communication interface to NFC chip 200, represents NFC chip 200 to be configured to data mode tranmitting data register request signal.In the time that NFC chip 200 needs NFC clock, tranmitting data register request signal 0x1234567890123456001 is transferred in clock request detection unit and is judged by data communication interface.Clock request detection unit judges 0x1234567890123456001 is identical with the clock the prestoring request of opening, while controlling the BBCLK pin output NFC clock of clock control cell 140.
In the time that NFC chip 200 does not need NFC clock, tranmitting data register request signal 0x1234567890123456000 is transferred in clock request detection unit and is judged by data communication interface.It is not identical that clock request detection unit judges 0x1234567890123456001 and the clock prestoring are opened request, but identical with the clock turn-off request prestoring, when the BBCLK pin of controlling clock control cell stops exporting NFC clock.
In sum, the present invention stops the output of NFC clock in the time that NFC chip does not need NFC clock, has reduced the power consumption after NFC function is opened, and saves power consumption; While needing NFC clock, export again NFC clock, NFC chip inputs or outputs related data after receiving NFC clock again, realize wireless near field communication, can not affect NFC chip operation, it is simple in structure, full automation control, facilitate energy consumption save, be applicable to wideling popularize.
Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (10)
1. a NFC clock control device for mobile terminal, is characterized in that, comprises master controller and NFC chip, and described master controller connects NFC chip;
Master controller starts the clock request mode of NFC chip to NFC chip transmission configuration-direct, when whether NFC chip needs clock according to it, send corresponding clock request signal to master controller; Master controller judges the command content of described clock request signal, exports or stops exporting NFC clock to NFC chip according to command content.
2. the NFC clock control device of mobile terminal according to claim 1, is characterized in that, described master controller comprises:
Data communication interface, for carrying out data communication with NFC chip, transmission configuration instruction is to NFC chip, and the clock request signal of reception NFC chip transmission;
Dispensing unit, for sending configuration-direct to NFC chip by data communication interface;
Clock request detection unit, for judging that the command content of clock request signal that NFC chip sends is the clock request of opening or clock turn-off request;
Clock control cell, for opening request output NFC clock according to clock to NFC chip, and stops exporting NFC clock to NFC chip according to clock turn-off request;
Described dispensing unit, data communication interface, clock request detection unit are connected successively with clock control cell, and described data communication interface, clock control cell connect NFC chip.
3. the NFC clock control device of mobile terminal according to claim 2, is characterized in that, the model of described master controller is MSM8225, and the model of NFC chip is PN544; The I2CSCL pin of master controller, I2CSDA pin, BBCLK pin connect respectively IF3 pin, IF2 pin, the XTAL1 pin of NFC chip.
4. the NFC clock control device of mobile terminal according to claim 2, is characterized in that, described configuration-direct is a string default data, for NFC chip configuration is become with data mode tranmitting data register request signal.
5. the NFC clock control device of mobile terminal according to claim 2, is characterized in that, described master controller also comprises:
Detecting unit, for detection of the model of NFC chip, generates corresponding configuration-direct according to the model control dispensing unit of NFC chip;
Described detecting unit connects dispensing unit.
6. a NFC clock control method for mobile terminal, is characterized in that, comprising:
A, master controller start the clock request mode of NFC chip to NFC chip transmission configuration-direct;
When whether B, NFC chip need clock according to it, send corresponding clock request signal to master controller;
C, master controller judge the command content of described clock request signal, export or stop exporting NFC clock to NFC chip according to command content.
7. NFC clock control method according to claim 6, is characterized in that, in described steps A, in the time of NFC chip enable, dispensing unit is sent configuration-direct and started the clock request mode of NFC chip to NFC chip by data communication interface.
8. NFC clock control method according to claim 6, is characterized in that, in described steps A, described configuration-direct is a string default data, for NFC chip configuration is become with data mode tranmitting data register request signal.
9. NFC clock control method according to claim 6, is characterized in that, specifically comprises at described step C:
The command content of the clock request signal that C1, clock request detection unit resolves NFC chip send;
Whether C2, the command content that judges described clock request signal and the clock prestoring are opened request identical; The identical clock control cell output NFC clock of controlling is to NFC chip, and difference performs step C3;
C3, judge that whether the command content of described clock request signal is identical with the clock turn-off request prestoring, the identical clock control cell of controlling stops exporting NFC clock to NFC chip, and difference does not respond.
10. NFC clock control method according to claim 6, is characterized in that, before described steps A, also comprises:
The model of A0, detection NFC chip, calls corresponding configuration-direct according to the model control dispensing unit of NFC chip.
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| CN201410399195.1A CN104182027B (en) | 2014-08-14 | 2014-08-14 | The NFC clock control devices and its method of a kind of mobile terminal |
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| CN108009115A (en) * | 2017-12-21 | 2018-05-08 | 郑州云海信息技术有限公司 | A kind of binode server board with clock redundancy feature |
| CN110808762A (en) * | 2020-01-07 | 2020-02-18 | 易兆微电子（杭州）有限公司 | Crystal-free method for NFC chip |
| US11239885B2 (en) | 2019-11-26 | 2022-02-01 | Samsung Electronics Co., Ltd. | Near field communication method and transceiver with clock recovery |
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| CN104182027B (en) | 2017-10-24 |
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Denomination of invention: NFC clock control device and method for mobile terminals Effective date of registration: 20230628 Granted publication date: 20171024 Pledgee: Weihai City Commercial Bank Limited by Share Ltd. high tech branch Pledgor: Weihai aegis Intelligent Technology Co.,Ltd. Registration number: Y2023980046065 |