CN202126697U - Dual interface secure digital (SD) card - Google Patents
Dual interface secure digital (SD) card Download PDFInfo
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- CN202126697U CN202126697U CN2011201656467U CN201120165646U CN202126697U CN 202126697 U CN202126697 U CN 202126697U CN 2011201656467 U CN2011201656467 U CN 2011201656467U CN 201120165646 U CN201120165646 U CN 201120165646U CN 202126697 U CN202126697 U CN 202126697U
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Abstract
The utility model discloses a dual interface secure digital (SD) card, which comprises an SD controller, a memorizer, a smart card circuit and an antenna connected with the smart card circuit. The memorizer and the smart card circuit are both connected with the SD controller, and a power supply of a partial circuit of the smart card circuit is connected with a power supply contact of the SD card through a controllable switch. The partial circuit of the smart card circuit comprises a power amplifier circuit, the output end of the power amplifier circuit is connected with the antenna, and the input end of the power amplifier circuit is connected with a radiating circuit of the smart card circuit. The partial circuit of the smart card circuit can further comprise the radiating circuit. The technical scheme of the dual interface SD card effectively controls a circuit which consumes more power to be closed only when the circuit is needed to work, thereby enabling the dual interface SD card to be more practical.
Description
Technical field
The utility model relates to mobile communication and mobile payment field, relates in particular to a kind of dual-interface SD (Secure Digital Memory Card) card with mobile payment function.
Background technology
China is the maximum country of world cellphone subscriber; Mobile phone is being not simple means of communication, and function is abundant day by day, integrates the multifunction electronic product of browsing file, streaming media playing, digital vedio recording and stored value card; Universal day by day along with computing machine, internet; Especially the develop rapidly of mechanics of communication, the inconvenience of the modes of payments that cash, bill and credit card etc. are traditional becomes increasingly conspicuous, and the mobile payment function of mobile phone just more and more comes into one's own; Under the condition that guarantees safety, through network carry out monetary payoff or fund flow have convenient, fast, efficiently reach the economic dispatch advantage.
Along with the development of mobile communication technology and payment technology, mobile payment and become an emerging technical field.Mobile payment is the product that mobile communication technology combines with E-Payment, merges the functional characteristics of portable terminal and handheld POS machine, makes payment not receive the restriction of when and where factor.
In the mobile payment field, realize that with the wireless short-distance communication mode payment mainly contains several kinds of solutions such as NFC (Near Field Communication, near-field communication), RF-SIM and double-interface SIM card based on mobile phone.The NFC scheme is a wireless technology of being united release in recent years by companies such as Nokia, Phillips; Be in newly-designed mobile phone, to add the RF module that is used to pay; Can in short distance, discern and exchanges data with compatible equipment, frequency of operation is 13.56MHz.This method can reasonable solution utilize mobile phone to carry out the RF identification problem, but the user must go to transform existing mobile phone, even buys a brand-new mobile phone, and waste resource and cost are high.RF-SIM is the RF identification SIM, and its frequency of operation is 2.4GHz, and is incompatible with existing international radio frequency standard 13.56MHz, also do not have communication standard, very risky.The double-interface SIM card scheme need not changed mobile phone, but antenna adopts external mode in this scheme, when the user changes SIM, need change contact type intelligent card yet, causes the wasting of resources and expensive equally.
In the prior art; Exist through transforming the structure of SD storage card; Realize the contactless communication of mobile phone through the SD card; The SD card is a kind of memory device of based semiconductor flash memory, and it is widely used on the mancarried device, for example digital camera, mobile phone, personal digital assistant PDA and multimedia player etc.Publication number is: disclose the technical scheme that a kind of SD of utilization card is realized mobile payment in the Chinese patent document of CN101853422A; But because the SD card size is very little; And the frequency of the communication frequency 13.56MHz that adopts is low; Wavelength is long, can't reach the size of external antenna, has satisfied not communicating requirement.Also have in the prior art and adopt the mode that increases power amplifier in addition to overcome the little shortcoming of antenna; For example publication number is: just disclosed this technical scheme in the Chinese patent open source literature of CN201570055U; But the battery capacity of mobile phone is very limited; This power amplifier power consumption is very big, and this technical scheme is not suitable for applying.
Summary of the invention
The purpose of the utility model just provides a kind of power saving, can postpone the battery of mobile terminal dual-interface SD card of service time.
Based on above-mentioned purpose, the utility model provides a kind of dual-interface SD card, comprises SD controller, storer, smart card circuitry and connected antenna, and said storer all is connected with the SD controller with smart card circuitry; The power supply of the partial circuit of said smart card circuitry is connected to the power contact of SD card through a gate-controlled switch.
As another preferred version, the partial circuit of said smart card circuitry comprises power amplifier circuit, and output terminal connects antenna, the radiating circuit of input end connection of intelligent card circuit.
As another preferred version, the partial circuit of said smart card circuitry also comprises radiating circuit.
As another preferred version, also comprise a tank circuit that is connected with antenna, the output terminal of said tank circuit connects the control end of said gate-controlled switch, controls the disconnection and the conducting of said gate-controlled switch.
As another preferred version, said smart card circuitry comprises the intelligent card data processing module, and said intelligent card data processing module is controlled the disconnection and the conducting state of the gate-controlled switch that is connected with this GPIO pin through the level of control GPIO pin.
As another preferred version, said intelligent card data processing module is according to the level of the APDU order control GPIO pin that receives.
As another preferred version, whether said intelligent card data processing module meets the level that specific criteria is controlled the GPIO pin according to the data-signal that receives from antenna.
As another preferred version, be provided with the on off state sign of power amplifier at storer, the intelligent card data processing module is provided with the level of GPIO pin according to the on off state sign.
As another preferred version, the SD controller is controlled said on off state sign according to the order that receives from portable terminal.
The technique scheme of the utility model is effectively controlled the higher circuit of power consumption ability energized in needs work, makes dual-interface SD card have practicality more.
Through below in conjunction with the description of accompanying drawing to the utility model preferred implementation, other characteristics, purpose and the effect of the utility model will become clear more and easy to understand.
Description of drawings
Fig. 1 is first example structure synoptic diagram in the utility model;
Fig. 2 is second example structure synoptic diagram in the utility model;
In all above-mentioned accompanying drawings, identical label representes to have identical, similar or corresponding feature or function.
Embodiment
As shown in Figure 1, the dual-interface SD card among first embodiment of the utility model comprises: smart card circuitry 1, SD controller 3, FLASH storer 5, energy-storage units 14, gate-controlled switch 13 and antenna 2; Wherein smart card circuitry 1 comprises intelligent card data processing module 7, receiving circuit 9, radiating circuit 10, power amplifier 11 and antenna-matching circuit 8; Said FLASH storer 5 and said intelligent card data processing module 7 all are connected with said SD controller 3; Wherein, Said SD controller 3 has the SD interface; Be used for being connected with portable terminal 6, said SD controller 3 is connected with intelligent card data processing module 7 through 7816 interfaces, and said intelligent card data processing module 7 also is connected with radiating circuit 10 input ends with the output terminal of said receiving circuit 9; The input end of receiving circuit 9 connects antenna-matching circuit 8; The output terminal of said radiating circuit 10 connects the input end of power amplifier 11, and the output terminal of said power amplifier 11 connects said antenna-matching circuit 8, and the power end of said power amplifier 11 connects switch 13 output terminals.The input end of said switch 13 connects SD card power contact 12, and the output terminal of switch connects the power end of power amplifier 11, and when switch 13 conductings, the output terminal of switch 13 is that power amplifier 11 provides working power; When switch 13 broke off, power amplifier 11 quit work because there not being power supply; The control end of switch 13 connects the voltage output end of energy-storage units 14; In the existing IC-card; Energy-storage units generally includes the bigger electric capacity of capacity; Through rectification circuit (diode) will be from antenna 2 electrical power storage (electric capacity also plays the effect of filtering) electric capacity that obtains of the electromagnetic field of couple variations, electric capacity provides working power for the IC-card circuit, because energy-storage units 14 also is a prior art; In existing contactless IC card, application is arranged all, just repeat no more here.The energy-storage units of the utility model no longer provides power supply for whole integrated circuit, only need be for switch 13 provide the control power supply, and therefore required electric energy is very little; As long as can make switch 13 conductings; Therefore the volume of electric capacity is also too big with regard to not needing, and switch 13 can be an electronic switch, for example a triode; Also can be mechanical switch, for example relay.As a kind of concrete mode wherein, said switch 13 is the NPN triode, and the collector of NPN triode connects SD card power contact 12; Emitter connects the power end of power amplifier 11, and base stage is connected the voltage output end of said energy-storage units 14 with emitter, in the time of near antenna 2 places CR; Receive electromagnetic field effect, for energy-storage units 14 provides energy, the voltage output end of energy-storage units 14 has voltage; Base voltage is higher than emitter voltage; Make collector and emitter conducting, i.e. NPN triode conducting is power amplifier 11 power supplies.Control mode also has a lot, has not just enumerated one by one here.When switch 13 was long open relay (when coil did not have electric current, switch 13 states were off-state), energy-storage units 14 provided electric current for relay coil, produced electromagnetic action, the CS conducting.
Said switch 13 can belong to smart card circuitry, also can be not belong to smart card circuitry, if belong to the part of smart card circuitry, can be integrated in the chip.
If the power of radiating circuit 10 is enough big, can unnecessary power amplifier 11.
If between antenna and receiving circuit and the radiating circuit to be connected impedance matching better, also can unnecessary special antenna-matching circuit 8.
Though in the present embodiment smart card circuitry is divided into receiving circuit, radiating circuit and intelligent card data processing module 7, in fact, this division not necessarily, receiving circuit and radiating circuit all can be divided in the intelligent card data processing module.
Said antenna-matching circuit 8 connects said antenna 2.Said antenna 2 can be that publication number is: CN1507603A, denomination of invention is: be used for making the method for the chip card with coil and the antenna that half-finished Chinese patent open source literature is put down in writing.
The electromagnetic wave that said antenna 2 receives that reader device produces as the 13.56MHZ of carrier wave; Aerial coil produces sensor current signal in the electromagnetic environment that changes; Part sensor current signal is diverted to energy-storage units 14; Another part sensor current signal is sent to said receiving circuit 9 through antenna-matching circuit 8, and the generation baseband signal sent to said intelligent card data processing module 7 after receiving circuit 9 carried out final demodulation with said sensor current signal.
For power saving more, switch 13 can also be controlled the power supply of radiating circuit simultaneously, shown in dotted line among Fig. 1.Omitted the power supply power supply synoptic diagram of other circuit units among the figure.
7 pairs of data that receive from said receiving circuit of intelligent card data processing module are carried out the ISO14443 protocal analysis, handle for the order that meets the ISO14443 standard, then abandon for undesirable data.Wherein, the processing of carrying out for the order that meets the ISO14443 standard comprises: one, anti-collision is handled and card selection processing; Two, sending ATS and PPS handles; Three, instruction parsing and the distribution processor of ADPU reception and APDU; After the order that intelligent card data processing module 7 will meet the ISO14443 standard was handled, the result data of command process and state sent through radiating circuit 10.Be input to the input end of said power amplifier 11 after said radiating circuit 10 is modulated said baseband signal, the signal after the modulation outputs to antenna-matching circuit 8 after amplifying through amplifier 11, launches through antenna 2 then.Said antenna matching network 8 can be a diplexer.
When describing below as the work of contact card, the workflow of SD controller, FLASH storer and intelligent card data processing module 7:
Portable terminal 6 sends the APDU instruction through SD controller 3 to intelligent card data processing module 7, and fetches the response data of intelligent card data processing module 7 through SD controller 3.
Portable terminal 6 uses write data instruction CMD24 or CMD25 to write the data block of specific format to the particular data address of SD controller 3 through the SD interface;
SD controller 3 is given intelligent card data processing module 7 according to the forwarding object of the address area divided data of the data block of portable terminal 6 transmissions for the data forwarding of intelligent card corresponding, contains the receptible APDU data of intelligent card data processing module 7 in the data block; Other address date is transmitted to the FLASH storer;
SD controller 3 receives the response APDU response data that intelligent card data processing module 7 is returned, and form packing by appointment, waits standby communication terminal 6 to read.
Portable terminal 6 uses read data instruction CMD17 or CMD18 from SD controller 3 particular address reading of data through the SD interface;
SD controller 3 judges whether current read data instruction is particular address (smart card specific address), if return the good APDU response data of packing to portable terminal; Otherwise be the FLAH storage address, the SD controller returns the FLASH memory data.
As shown in Figure 2; SD card among second embodiment of the utility model and the difference of first embodiment are: do not have energy-storage units 14 among second embodiment; The control signal of switch 13 is produced by intelligent card data processing module 7, other circuit the same with among above-mentioned first embodiment, and intelligent card data processing module 7 is exported a control signal on the GPIO pin; The conducting of CS 13 and disconnection, the generation of this control signal can have two kinds of situation:
One, after intelligent card data processing module 7 receives the reception data of said receiving circuit 9 transmissions, before carrying out data processing, perhaps produces afterwards the control end that a control signal outputs to said switch 13.7 pairs of (just receiving through antenna) data that receive from receiving circuit of intelligent card data processing module are carried out the ISO14443 protocal analysis; If this data fit ISO14443 standard; Explain that then near-field communication starts; Intelligent card data processing module 7 makes switch 13 conductings, power amplifier 11 obtain power supply and starts working at GPIO pin output control voltage; And the order that meets the ISO14443 standard handled, process result data and state send through radiating circuit 10.After transmission finished, intelligent card data processing module 7 became low level with the GPIO pin, and power amplifier 11 cuts out, to save the loss of cellular phone power supplies.
Data to not meeting the ISO14443 standard all abandon.Other of intelligent card data processing module 7 handles specifically that anti-collision is for example handled and card selects to handle, send ATS and PPS handles, APDU receives and the instruction parsing of APDU and distribution processor etc. are prior art, just is not described in detail here.
Two, cell phone software ACTIVE CONTROL intelligent card data processing module 7 produces high level or low level at the GPIO pin, with the conducting and the disconnection of CS 13.Concrete control procedure is following: the application program on the portable terminal issues the APDU instruction of switch power amplifier 11 through the SD interface.SD controller 3 through the data layout analysis, extracts the APDU instruction after the steering order of receiving power amplifier 11; Be issued to intelligent card data processing module 7 to the APDU instruction through the ISO7816 communications protocol again, intelligent card data processing module 7 is resolved instruction after receiving the APDU instruction; Affirmation is after closing or open the instruction of power amplifier 11; The level of GPIO pin is set, and GPIO pin level is set at 0 o'clock, is to close power amplifier; GPIO pin level is provided with at 1 o'clock, is to open power amplifier 11.
The on off state mark P F of power amplifier can also be set at the smartcard internal storer simultaneously.Whether intelligent card data processing module 7 is 1 according on off state mark P F; If PF is 1; Then handle the data that receive from receiving circuit 9, if PF is 0, then intelligent card data processing module 7 abandons the data that receive from receiving circuit 9; And get into low-power consumption mode again, to save the consumption of power supply.
Dual-interface SD card in the utility model does not limit the physics size and form, can be common SD card, can be Micro SD card yet, perhaps the smart card with SD interface of other physical aspects.
The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (9)
1. a dual-interface SD card comprises SD controller, storer, smart card circuitry and connected antenna, and said storer all is connected with the SD controller with smart card circuitry; It is characterized in that the power supply of the partial circuit of said smart card circuitry is connected to the power contact of SD card through a gate-controlled switch.
2. a kind of dual-interface SD card according to claim 1 is characterized in that the partial circuit of said smart card circuitry comprises power amplifier circuit, and output terminal connects antenna, the radiating circuit of input end connection of intelligent card circuit.
3. a kind of dual-interface SD card according to claim 2 is characterized in that the partial circuit of said smart card circuitry also comprises radiating circuit.
4. according to each described a kind of dual-interface SD card in the claim 1 to 3; It is characterized in that; Also comprise a tank circuit that is connected with antenna, the output terminal of said tank circuit connects the control end of said gate-controlled switch, controls the disconnection and the conducting of said gate-controlled switch.
5. according to each described a kind of dual-interface SD card in the claim 1 to 3; It is characterized in that; Said smart card circuitry comprises the intelligent card data processing module, and said intelligent card data processing module is controlled the disconnection and the conducting state of the gate-controlled switch that is connected with this GPIO pin through the level of control GPIO pin.
6. a kind of dual-interface SD card according to claim 5 is characterized in that, said intelligent card data processing module is according to the level of the APDU order control GPIO pin that receives.
7. a kind of dual-interface SD card according to claim 5 is characterized in that, whether said intelligent card data processing module meets the level that specific criteria is controlled the GPIO pin according to the data-signal that receives from antenna.
8. a kind of dual-interface SD card according to claim 5 is characterized in that, is provided with the on off state sign of power amplifier at storer, and the intelligent card data processing module is provided with the level of GPIO pin according to the on off state sign.
9. a kind of dual-interface SD card according to claim 7 is characterized in that, the SD controller is controlled said on off state sign according to the order that receives from portable terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201656467U CN202126697U (en) | 2011-05-23 | 2011-05-23 | Dual interface secure digital (SD) card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201656467U CN202126697U (en) | 2011-05-23 | 2011-05-23 | Dual interface secure digital (SD) card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202126697U true CN202126697U (en) | 2012-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201656467U Expired - Fee Related CN202126697U (en) | 2011-05-23 | 2011-05-23 | Dual interface secure digital (SD) card |
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| Country | Link |
|---|---|
| CN (1) | CN202126697U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684502A (en) * | 2012-09-04 | 2014-03-26 | 英飞凌科技股份有限公司 | Chip card communication arrangement and chip card communication circuit |
-
2011
- 2011-05-23 CN CN2011201656467U patent/CN202126697U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684502A (en) * | 2012-09-04 | 2014-03-26 | 英飞凌科技股份有限公司 | Chip card communication arrangement and chip card communication circuit |
| CN103684502B (en) * | 2012-09-04 | 2016-05-18 | 英飞凌科技股份有限公司 | Chip card communication configuration part and chip card telecommunication circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: TONGFANG COMPUTER CO., LTD. Assignor: Tongfang Co., Ltd. Contract record no.: 2012110000187 Denomination of utility model: Dual-interface SD card Granted publication date: 20120125 License type: Exclusive License Record date: 20121221 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120125 Termination date: 20170523 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |