CN1770132A - Connector between processor and user recognition card - Google Patents
Connector between processor and user recognition card Download PDFInfo
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- CN1770132A CN1770132A CN 200410086356 CN200410086356A CN1770132A CN 1770132 A CN1770132 A CN 1770132A CN 200410086356 CN200410086356 CN 200410086356 CN 200410086356 A CN200410086356 A CN 200410086356A CN 1770132 A CN1770132 A CN 1770132A
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- usim card
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Abstract
The invention discloses a processor and a connection device between user identification card (USIM). The processor comprises a universal asynchronous receiver interface which comprises at least data sending data terminal and data receiving terminal. The connection device comprises interface converting unit which is connected with the UART interface of the processor and USIM card separately for establishing communication between UART interface and USIM card, and completing the conversion between UART double lines single direction receiving and transmitting signal and USIM single line double directions receiving and transmitting signal. The invention has the advantages of having lower cost.
Description
Technical field
The present invention relates to be arranged in the communications field coupling arrangement between processor and the Subscriber Identity Module, relate in particular to the coupling arrangement between processor and the Subscriber Identity Module (SIM, Subscriber Identify Module or USIM UserService Identity Module).
Background technology
Along with the evolution of mobile communication technology, the importance of portable terminal industry also improves thereupon.Thus, numerous domestic and international enterprises are all in the portable terminal market of aiming at the market the following 3G (the 3rd third-generation mobile communication) that has a high potential.Though the exploitation of 3G portable terminal is an exploitation difficult problem of generally acknowledging,, also have a lot of enterprises doing to make great efforts untiringly-----carry out the exploitation of the every business of portable terminal, satisfy user's needs so that can constantly put out a new product.
In the performance history of portable terminal, need carry out various tests.Modal test mode is with existing equipment (mainly comprising portable terminal) emulation testing environment, and bestows various test conditions, obtains various test results, then by analyzing various test results have new business with exploitation portable terminal.
Portable terminal comprises bare machine (portable terminal that the present invention will not install Subscriber Identity Module is called bare machine) and Subscriber Identity Module.User Recognition is stuck in and is commonly referred to as SIM card (Subscriber IdentifyModule) in the gsm system, and with universal mobile telecommunications system (Universal Mobile TelecommunicationSystem, UMTS) be called usim card (User ServiceIdentity Module) in the 3-G (Generation Three mobile communication system) of representative, with respect to the single application of SIM card, usim card then separates the platform of mobile communication with using, thereby more applications is provided.Subscriber Identity Module is represented user profile, is the international mobile subscriber identification module, and it is mainly used in the various data of control access, to finish functions such as customer identity right checking and customer information cryptographic algorithm.And it also provides the necessary user of mobile network to confirm function, makes operator to provide new service and application for the user.Described service and application comprise telephone directory, service menu and differentiate user place network, make the user can free-roaming in different network environments.Subscriber Identity Module need be worked under the control of corresponding controller usually.Such as, in the GSM terminal, SIM card need be connected with the processor of terminal in the control of SIM controller, but the SIM controller is integrated on the SIM card usually at present.And usim card also need be set up with the processor of communication terminal under the control of USIM controller and be connected, so that carry out operations such as authenticating user identification.
In present 3G terminal performance history, because the exploitation of USIM controller needs the long construction cycle, therefore not only time-consuming, effort and cost of developing height adopt the SIM controller to finish the interface work of USIM controller usually.And all do not have embedded USIM module on the processor of current portable terminal, therefore need add coupling arrangement (the existing SIM controller that mainly comprises) and realize communicating by letter between processor and the external usim card.Please refer to Fig. 1, it is that processor is set up the coupling arrangement schematic diagram of communicating by letter with usim card in the 3G terminal performance history.This coupling arrangement comprises SIM controller 11 and level conversion unit 12.Wherein,
The effect of level transferring chip 12 is conversions of carrying out signal level between SIM controller and usim card, so that both just secure communications.
From the above, prior art mainly is to utilize existing SIM controller to set up communicating by letter between processor and the usim card, and there is following technological deficiency in this coupling arrangement:
Embedded single-chip microcomputer of SIM controller and relevant control circuit, the working current that needs be in the 10mA magnitude, thereby make that the power consumption of coupling arrangement is higher relatively.And the chip size of SIM controller is approximately 7mm
*7mm has improved whole coupling arrangement area occupied.
In addition, though the SIM controller of using in fields such as GSM has been very ripe product, but present most of SIM controller and SIM card have been integrated in one, and do not need plug-in SIM control chip, thus, the SIM controller that is applied in communication terminal on the market separately seldom, the manufacturer that correspondingly supplies this type of chip is also few, not only buying difficulty but also improved the cost of development of communication terminal relatively.
Summary of the invention
The object of the present invention is to provide the coupling arrangement between a kind of processor and the usim card, set up the technical matters that the coupling arrangement power consumption is big, area is big, cost is high of communicating by letter between processor and the usim card to solve available technology adopting SIM controller.
For addressing the above problem, the invention discloses a kind of coupling arrangement of communicating by letter between processor and the usim card realized, comprise the UART interface on the described processor, described UART interface comprises data at least and sends signal end and data reception signal end, described coupling arrangement comprises interface conversion unit, the UART interface and the usim card of connection processing device are used to set up the data communication between UART interface and the usim card: finish the conversion between unidirectional receiving and transmitting signal of UART two-wire and USIM mongline bidirectional receiving and transmitting signal respectively.
Wherein, also comprise the level conversion unit that is arranged between described interface conversion unit and the described usim card,, improve the reliability of communicating by letter between interface conversion unit and the usim card in order to finish the variation of signal level.
Described interface conversion unit comprises first triple gate, second triple gate and not gate, wherein:
The input end of first triple gate is connected the UART interface with Enable Pin data send signal end; The Enable Pin of second triple gate sends signal end by the data that not gate connects described UART interface, its output terminal connects the data reception signal end of UART interface, and the input end of the output terminal of described first triple gate, described second triple gate is connected to the receiving and transmitting signal end of described usim card.
The one IO signal of communication end of described UART interface is connected to the receiving and transmitting signal end of usim card.
Described interface conversion unit also comprises the first pull-up resistor R1, and the end of the described first pull-up resistor R1 connects power supply, and the other end connects the receiving and transmitting signal end of usim card.
Described interface conversion unit also comprises the second pull-up resistor R2, and the end of the described second pull-up resistor R2 connects power supply, and the other end connects the data reception signal end of UART interface.
The clock signal terminal of described UART interface is connected to the clock signal terminal of usim card.
The second universal I signal end of described UART interface is connected to the reset terminal of usim card.
Compared with prior art, the present invention has the following advantages: the coupling arrangement that the present invention adopts be utilize the UART interface of processor set up with usim card between communicate by letter, omitted the SIM control chip thus, and then reduce the cost of developing portable terminal, and also reduced the area of coupling arrangement thus.
Realize by an interface conversion unit that comprises 3 simple gate devices such as this coupling arrangement, reach and set up processor and usim card realization of Communication cost is low, and the supply current of each gate device is low, thereby reduced power consumption.Also have, the cost of development of communication terminal is purchased easily and reduced to gate device.
Description of drawings
Fig. 1 is that processor is set up the coupling arrangement schematic diagram of communicating by letter with usim card in the 3G terminal performance history;
Fig. 2 is the synoptic diagram of data layout that transmits on the usim card and the data layout comparison of adopting the UART standard transmission;
Fig. 3 is used to set up the coupling arrangement structural representation that processor and USIM communicate to connect;
Fig. 4 is the structural representation of interface conversion unit.
Embodiment
Below in conjunction with accompanying drawing, specify the present invention.
UART (being Universal Asynchronous Receiver Transmitter UART Universal Asynchronous Receiver Transmitter) is widely used serial data transport protocol, and mainly containing on the structure is graded by data bus interface, steering logic, Baud rate generator, transmission part and acceptance division forms.The data of transmitting on the usim card have a lot of similarities with adopting UART standard transmission data.See also Fig. 2, it is the synoptic diagram of data layout that transmits on the usim card and the data layout comparison of adopting the UART standard transmission.
By above-mentioned comparison as can be known, their 1 frame data all are by 1bit (bit) start bit, 8 bit data position 1BIT parity check bit (PARITY BIT), and guard time/position of rest (more than or equal to 2BIT) is formed.Basic identical on the two data layout, the sequential in the transmission data.Both key distinction parts are:
(1) data-signal quantity: usim card only has a two-way signal wire; And UART has two, each one of Data Receiving, transmission;
(2) mistake indication and detecting: for usim card,,, then in the guard time section, send a low level, send error in data to the transmitting terminal indication when USIM exists parity errors to mistake as receiving end and the data that received according to the ISO7816 standard.Corresponding, transmitting terminal is monitored data signal line after parity check bit sends end, if (in the guard time section) detects low level, then should carry out corresponding error and handle.
Owing to all have the UART mouth on the existing processor (as DSP, CPU), therefore the invention provides a kind of UART of utilization and realize the coupling arrangement of communicating by letter between processor and the usim card, and need not additionally to increase the SIM controller, and then reach the purpose that reduces hardware cost.See also Fig. 3, it is to be used to set up the coupling arrangement structural representation that processor and USIM communicate to connect.Comprise the UART interface on the processor, described UART interface comprises data and sends signal end, data reception signal end and the first universal I signal end, this coupling arrangement comprises interface conversion unit, the UART interface and the usim card of connection processing device are used to set up the data communication between UART interface and the usim card: finish the conversion between unidirectional receiving and transmitting signal of UART two-wire and USIM mongline bidirectional receiving and transmitting signal respectively.
And this coupling arrangement can also comprise a level conversion unit that is arranged between interface conversion unit and the usim card, in order to finish the variation of signal level, improves the reliability of communicating by letter between interface conversion unit and the usim card.
See also Fig. 4, it is for a specific embodiment of interface conversion unit of the present invention.This interface conversion unit comprises the first triple gate B1, the second triple gate B2 and not gate INV, wherein:
The input end of the first triple gate B1 is connected the UART interface with Enable Pin EN1 data send signal end UART-TX; The Enable Pin EN2 of the second triple gate B2 sends signal end UART-TX by the data that not gate INV connects described UART interface, its output terminal connects the data reception signal end UART-RX of UART interface, and the input end of the output terminal of the described first triple gate B1, the described second triple gate B2 and the first universal I signal end GPIO1 are connected to the receiving and transmitting signal end SIM-IO of described usim card.
Interface conversion unit also comprises the first pull-up resistor R1, and the end of the first pull-up resistor R1 connects power supply, and the other end connects the receiving and transmitting signal end GPIO1 of usim card.Described interface conversion unit also comprises the second pull-up resistor R2, and the end of the described second pull-up resistor R2 connects power supply, and the other end connects the data reception signal end UART-RX of UART interface.
Enable Pin EN1, the EN2 that supposes triple gate B1, B2 is during for " 0 ", and B1, B2 open, and when EN1, EN2 were " 1 ", B1, B2 were output as high-impedance state.
Triple gate B1, B2 and not gate INV constitute basic transmitting-receiving change-over circuit, finish the conversion between unidirectional receiving and transmitting signal of UART two-wire and USIM mongline bidirectional receiving and transmitting signal, the loopback of anti-stop signal, conflict etc.
(1) processor sends data to usim card
UART-TX is output as " 0 ", and the Enable Pin EN1 of first triple gate is " 0 ", and the B1 door is opened, and SIM-IO sends the data that signal end UART-TX sends for receiving data.This moment, the Enable Pin EN2 of second triple gate be " 1 ", and the B2 door is not opened, and owing to the effect of pull-up resistor R2, being input as of data reception signal end UART-RX " 1 ".
According to the UART interface specification, the start bit of data should be " 0 ", promptly has only received signal (UART-RX) low level time side to occur and starts reception.Therefore, send in the whole process of data to usim card at processor, can not receive on the UART-RX, promptly the data of Fa Songing can not receive by loopback and by the UART mouth mistake of processor.
(2) usim card sends data to system
The Enable Pin EN2 of second triple gate is " 0 ", and the B2 door is opened, and the signal that the SIM-IO end of SIM card sends is received by the UART mouth of processor by the data-interface signal end UART-RX that the second triple gate B2 is transferred to processor.
(3) error-detecting
In the present embodiment, realize the defined error detection function of ISO7816 by GPIO1.
When usim card sent data, GPIO1 was set to input, is mainly used in the reception data at processor.After each data (8BIT data and 1BIT check bit) sent end, GPIO1 detected the SIM-IO signal in the time at follow-up 2BIT.If SIM-IO remains " 1 ", illustrate that then data are correctly received by usim card; If detect low saltus step, illustrate that then usim card receives error in data, processor need carry out corresponding error and handle (as retransmitting).
Receive the data procedures from usim card in system, GPIO1 still is set to input, also is used to receive data.After each 1 frame data (8BIT data and 1BIT check bit) received end, if verification is correct, GPIO1 remained input; If check errors, GPIO1 are set to output, output level is " 0 ", notice usim card Data Receiving mistake.
(4) reset
The second universal I end GPIO2 of UART mouth is connected with the SIM-RST of usim card, and be used for usim card is resetted: generally, this signal is output as " 1 "; When needs resetted to usim card, GPIO2 exported a undersuing, finishes resetting to usim card.
(5) clock signal
The clock signal terminal CLKOUT of UART mouth connects the clock signal terminal SIM-CLK of usim card, is used for providing work clock to usim card, and according to the ISO7816 standard, this signal frequency (fc1k) should be between 1～5MHz.According to the ISO7816 standard, usim card IO signal data width (every BIT time, i.e. ETU) is 375/fclk.The UART data rate should be set to identical with usim card.If processor can't provide suitable clock signal, can provide the usim card clock by adding crystal oscillator.
More than disclosed only be several specific embodiment of the present invention, protection scope of the present invention is not limited thereto, any those skilled in the art can think variation all should drop in protection scope of the present invention.
Claims (8)
1, the coupling arrangement between a kind of processor and the Subscriber Identity Module, this Subscriber Identity Module is called for short usim card, comprise the UART Universal Asynchronous Receiver Transmitter interface on the described processor, be called for short the UART interface, this UART interface comprises data at least and sends signal end and data reception signal end, it is characterized in that, described coupling arrangement comprises interface conversion unit, the UART interface and the usim card of connection processing device are used to set up the data communication between UART interface and the usim card: finish the conversion between unidirectional receiving and transmitting signal of UART two-wire and USIM mongline bidirectional receiving and transmitting signal respectively.
2, the coupling arrangement between processor as claimed in claim 1 and the Subscriber Identity Module, it is characterized in that, also comprise: be arranged on the level conversion unit between described interface conversion unit and the described usim card, in order to finish the variation of signal level, improve the reliability of communicating by letter between interface conversion unit and the usim card.
3, the coupling arrangement between processor as claimed in claim 1 or 2 and the Subscriber Identity Module is characterized in that, described interface conversion unit comprises first triple gate, second triple gate and not gate, wherein:
The input end of first triple gate is connected the UART interface with Enable Pin data send signal end; The Enable Pin of second triple gate sends signal end by the data that not gate connects described UART interface, its output terminal connects the data reception signal end of UART interface, and the input end of the output terminal of described first triple gate, described second triple gate is connected to the receiving and transmitting signal end of described usim card.
4, the coupling arrangement between processor as claimed in claim 3 and the Subscriber Identity Module is characterized in that, an IO signal of communication end of described UART interface is connected to the receiving and transmitting signal end of usim card.
5, as the coupling arrangement between claim 3 or 4 described processors and the Subscriber Identity Module, it is characterized in that, described interface conversion unit also comprises the first pull-up resistor R1, and the end of the described first pull-up resistor R1 connects power supply, and the other end connects the receiving and transmitting signal end of usim card.
6, as the coupling arrangement between claim 3 or 4 described processors and the Subscriber Identity Module, it is characterized in that, described interface conversion unit also comprises the second pull-up resistor R2, and the end of the described second pull-up resistor R2 connects power supply, and the other end connects the data reception signal end of UART interface.
7, the coupling arrangement between processor as claimed in claim 1 or 2 and the Subscriber Identity Module is characterized in that, the clock signal terminal of described UART interface is connected to the clock signal terminal of usim card.
8, the coupling arrangement between processor as claimed in claim 1 or 2 and the Subscriber Identity Module is characterized in that, the second universal I signal end of described UART interface is connected to the reset terminal of usim card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100863568A CN100356359C (en) | 2004-10-26 | 2004-10-26 | Connector between processor and user recognition card |
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| CNB2004100863568A CN100356359C (en) | 2004-10-26 | 2004-10-26 | Connector between processor and user recognition card |
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| CN1770132A true CN1770132A (en) | 2006-05-10 |
| CN100356359C CN100356359C (en) | 2007-12-19 |
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| CNB2004100863568A Active CN100356359C (en) | 2004-10-26 | 2004-10-26 | Connector between processor and user recognition card |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201829A (en) * | 2010-03-26 | 2011-09-28 | 上海摩波彼克半导体有限公司 | Circuit structure and method for realizing data parsing of SIM/USIM ((Subscriber Identity Module/Universal Subscriber Identity Module) card in digital baseband communication chip |
| CN102521197A (en) * | 2011-12-13 | 2012-06-27 | 福建鑫诺通讯技术有限公司 | Method for realizing ISO7816 protocol with UART (universal asynchronous receiver/transmitter) of low-cost MCU (micro-control unit) |
| WO2013178149A1 (en) * | 2012-08-24 | 2013-12-05 | 中兴通讯股份有限公司 | Method, adapter, and system for implementing connection between mobile terminal and human interface device |
| CN103581157A (en) * | 2012-08-10 | 2014-02-12 | 中兴通讯股份有限公司 | Embedded device and control method for carrying out data communication based on same |
| CN103607495A (en) * | 2013-12-04 | 2014-02-26 | 东信和平科技股份有限公司 | SIM card signal collecting method and device |
| CN104125300A (en) * | 2014-08-11 | 2014-10-29 | 烽火通信科技股份有限公司 | Synchronizing method for set-card separate type domestic gateway business configuration data |
| CN111090602A (en) * | 2019-12-24 | 2020-05-01 | 成都天玙兴科技有限公司 | UART serial port transceiving self-adaption method and system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010063909A (en) * | 1999-12-24 | 2001-07-09 | 박종섭 | Uart compatible smart card interface |
| US20050160448A1 (en) * | 2001-09-28 | 2005-07-21 | Duffield David J. | Smartcard uart for minimizing processor demands in a conditional access system |
-
2004
- 2004-10-26 CN CNB2004100863568A patent/CN100356359C/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201829A (en) * | 2010-03-26 | 2011-09-28 | 上海摩波彼克半导体有限公司 | Circuit structure and method for realizing data parsing of SIM/USIM ((Subscriber Identity Module/Universal Subscriber Identity Module) card in digital baseband communication chip |
| CN102201829B (en) * | 2010-03-26 | 2013-11-27 | 上海摩波彼克半导体有限公司 | Circuit structure and method for realizing data parsing of SIM/USIM ((Subscriber Identity Module/Universal Subscriber Identity Module) card in digital baseband communication chip |
| CN102521197A (en) * | 2011-12-13 | 2012-06-27 | 福建鑫诺通讯技术有限公司 | Method for realizing ISO7816 protocol with UART (universal asynchronous receiver/transmitter) of low-cost MCU (micro-control unit) |
| CN103581157A (en) * | 2012-08-10 | 2014-02-12 | 中兴通讯股份有限公司 | Embedded device and control method for carrying out data communication based on same |
| WO2014023247A1 (en) * | 2012-08-10 | 2014-02-13 | 中兴通讯股份有限公司 | Embedded device and method for control data communication based on the device |
| WO2013178149A1 (en) * | 2012-08-24 | 2013-12-05 | 中兴通讯股份有限公司 | Method, adapter, and system for implementing connection between mobile terminal and human interface device |
| CN103607495A (en) * | 2013-12-04 | 2014-02-26 | 东信和平科技股份有限公司 | SIM card signal collecting method and device |
| CN103607495B (en) * | 2013-12-04 | 2017-03-08 | 东信和平科技股份有限公司 | SIM signal acquisition method and device |
| CN104125300A (en) * | 2014-08-11 | 2014-10-29 | 烽火通信科技股份有限公司 | Synchronizing method for set-card separate type domestic gateway business configuration data |
| CN104125300B (en) * | 2014-08-11 | 2017-09-29 | 烽火通信科技股份有限公司 | The synchronous method of separation between machine and card type home gateway service configuration data |
| CN111090602A (en) * | 2019-12-24 | 2020-05-01 | 成都天玙兴科技有限公司 | UART serial port transceiving self-adaption method and system |
| CN111090602B (en) * | 2019-12-24 | 2022-04-15 | 成都天玙兴科技有限公司 | UART serial port transceiving self-adaption method and system |
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|---|---|
| CN100356359C (en) | 2007-12-19 |
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