CN1949164B - Time-division multiplexing IC card interface equipment - Google Patents
Time-division multiplexing IC card interface equipment Download PDFInfo
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- CN1949164B CN1949164B CN2006100910159A CN200610091015A CN1949164B CN 1949164 B CN1949164 B CN 1949164B CN 2006100910159 A CN2006100910159 A CN 2006100910159A CN 200610091015 A CN200610091015 A CN 200610091015A CN 1949164 B CN1949164 B CN 1949164B
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Abstract
The invention relates to IC card interface device used fewer interface resource to realize multiple IC cards time sharing operation and multiplexing. Its technical proposal includes the following steps: it includes microprocessor MCU or special IC card interface chip, many IC card interfaces for IC card communication accord; its features are that it set one or many electronic switch between the MCU or special IC card interface chip and the IC card interfaces; the common input/output CIO of the electronic switch are respectively connected with the MCU of the special IC card interface chip port; its switching input/output SIO are respectively connected with RST and I/O interface of the IC card; the MCU or the special IC card interface chip is connected with control input CI of the electronic switch to make them do for only one IC card at a certain moment, realize multiple IC card interfaces time sharing multiplexing.
Description
Technical field
The invention belongs to IC-card interfacing equipment (Interface Device, IFD) field, especially a kind of many interface IC cards interfacing equipment of time-sharing multiplex.So-called time-sharing multiplex is meant by microcontroller (MCU) or application-specific integrated circuit card chip controls and comprises that the electronic switching circuit of data selector (Data Selector) realizes that the timesharing of a plurality of IC-card interfaces switches, makes and having only an IC-card to use the interface resource of MCU in the section sometime.
Background technology
The IC-card interfacing equipment means any equipment or device that carries out communication with IC-card, comprise the IC-card card reader (Card Reader) of connection computing machine use and the IC-card terminal (Terminal) that off line is used, also comprise special-purpose IC-card application apparatus in addition, such as IC-card water, electricity, gas table, and be embedded in the IC-card interface of realizing by MCU or special-purpose IC-card interface chip in other universal or special equipment.
Common IC-card interfacing equipment is generally only supported an IC-card operation, according to demand for security, particularly needs to use the PSAM card user's IC-card to be carried out under the situation of safety certification, needs to use the interfacing equipment that can operate a plurality of IC-cards.For the interfacing equipment that can operate a plurality of IC-cards, modal implementation is an interface operation of independently being realized a plurality of IC-cards by the special use of the MCU in the IC-card interfacing equipment or universal port, taken more MCU resource, particularly for the MCU that only supports one or two IC-card operation, expansion IC-card interface quantity need be carried out software and hardware and transplant having on the MCU of more interface resources, increase the cost of MCU on the one hand, also prolonged product development cycle on the other hand.
In fact, independently take the situation of MCU or application-specific integrated circuit card chip port resource for a plurality of IC-cards, because the operation of a plurality of IC-cards has the characteristics of relevance and succession, each IC-card interface is not worked simultaneously, that is to say that at a time MCU or application-specific integrated circuit card chip only operate one of them IC-card.In view of the above, the thought of the IC-card interface time sharing multiplex that proposes of the present invention is practicable for practical application.
Summary of the invention
Based on above analysis, the present invention proposes and a kind ofly can take the IC-card interfacing equipment that less MCU port resource is realized the time-sharing multiplex of a plurality of IC-cards operation, can reduce cost of products, can expand more IC-card interface easily on the less I C card equipment existing only the support.
Technical scheme of the present invention is: the IC-card interfacing equipment of time-sharing multiplex, comprise the microprocessor MCU that realizes the IC-card communications protocol or application-specific integrated circuit card chip, several IC-card interfaces, it is characterized in that between described MCU or special-purpose IC-card interface chip and IC-card interface, one or more electronic switches being set, (1) the public I/O end CIO of electronic switch is connected with the I/O port with the RST that resets of described MCU or application-specific integrated circuit card chip operation IC-card respectively, finishes the operation to some IC-cards; (2) the switching I/O end SIO of electronic switch is connected with the interface of IC-card respectively, forms several and is used to operate the RST of IC-card and the port of I/O; (3) MCU or application-specific integrated circuit card chip are connected with the control input end CI of electronic switch by several ports, the public I/O end CIO of control electronic switch switches with the timesharing of switching I/O end SIO, make and in section sometime, have only IC-card interface to use the port resource of MCU or application-specific integrated circuit card chip, realized the time-sharing multiplex of several IC-card interfaces.
Although electronic switching circuit has different specifications, kind and implementation, its port is divided from function and is mainly contained three kinds, and the port of first control electronic switch passage conducting is referred to herein as control input end CI (Control Inputs); It two is ports of negligible amounts in the electronic switch passage, is referred to as public I/O end CIO (Common In/Out) at this; It three is a fairly large number of ports in the electronic switch passage, referred to herein as switching I/O end SIO (Switch In/Out).For convenience, use self-defining english abbreviation CI, CIO and SIO to represent control input end, public I/O end and switching I/O end respectively in the patent specification.
Being used to of being connected with the CIO of electronic switch operated the port of the I/O of IC-card, be special-purpose COM port or the general purpose I/O port that uses software programming, MCU or special-purpose IC-card interface chip pass through RS232, USB or other communication interface and computing machine or other microprocessor communication.
Holding the SIO of the electronic switch that is connected to hold built-in or external pull-up resistor with the RST of IC-card with I/O, make it in not by gating, be in high level state, keep the duty of the RST and the I/O end of the IC-card of gating not, make it after by gating, can continue to carry out follow-up IC-card operational order.
Described IC-card interfacing equipment is to can be used for connecting the IC-card card reader (CardReader) that computing machine uses, and also can be used for the IC-card terminal (Card Terminal) that off line is used, and also can be used for the IC-card application apparatus of various special uses.
Except IC-card RST and I/O end, other comprise that other signals that snap into position, power supply control, duty indication also adopt the time-sharing multiplex working method.
Use the CI of the port controlling electronics of N MCU or application-specific integrated circuit card chip in principle, add the RST of MCU or application-specific integrated circuit card chip operation IC-card and 2 ports of I/O, can realize 2
N(N=1,2, the 3...) time-sharing multiplex of the RST of individual IC-card and I/O interface is on concrete the enforcement, for 2
NThe time-sharing multiplex of individual IC-card interface, configuring condition according to employed electronic switch and peripheral circuit, the quantity of employed control port from MCU or application-specific integrated circuit card chip can less than, be equal to or greater than N, also can on a MCU or application-specific integrated circuit card chip, both use IC-card interface independently also to use the IC-card interface of time-sharing multiplex.
The used circuit that switch switches of can realizing comprises: MC14529 data selector integrated circuit; CD4051, CD4052, CD4053, CD4066 analog switching circuit; Other integrated circuit with switch handoff functionality; The two-way switch circuit of forming by triode or logic gates.
Effect of the present invention is: for the IC-card interfacing equipment that can carry out a plurality of IC-card operations, according to application demand, operation for a plurality of IC-cards is in sequence, also promptly in some moment, only need operate one of them IC-card, other IC-card only need keep the work at present state to get final product.
Based on such consideration, we can realize the RST of IC-card and the time-sharing multiplex of I/O port by use electronic switching circuit cheaply outside MCU or application-specific integrated circuit card chip, thereby reduce the port resource that takies MCU or application-specific integrated circuit card chip.In theory, use N+2 (N=1,2,3...) individual MCU port comprises that the port of CI of N control electronic switch and 2 operate the RST of IC-cards and the port of I/O, can realize 2
NThe interface operation of individual IC-card.And use MCU independently or application-specific integrated circuit card chip port to realize then needing to use 2 by the IC-card interface of equal number
N+1Individual port.
Except the RST and I/O of IC-card, other signal end of IC-card in theory, for example clock (CLK) although, the time-sharing multiplex that snaps into signals such as bit switch, duty indication has little significance and also can realize.Generally speaking, for the CPU card that uses asynchronous communication agreement (for example T=0 and T=1 agreement), CLK generally adopts hardware clock, is can be by the shared CLK signal of a plurality of IC-cards satisfying under the situation of driving force; And for the storage card that uses the synchronous transmission agreement, its CLK port generally uses general purpose I/O port of MCU that software clock is provided.The IC-card interface is supported two kinds of communications protocol if desired, and the CLK signal of two kinds of forms just need be provided, and by the communications protocol type of reset answer ATR (Answer To Reset) judgement IC-card, selects suitable CLK signal for IC-card provides.CLK signal multiplexing if desired also should be considered the switching controls of software clock and hardware clock.Adopt time-sharing multiplex if snap into a signal, can only adopt the regularly working method of inquiry, and can not adopt the working method of interruption.If a plurality of duty indications are arranged, the IC-card working station indicator that also can use time-sharing multiplex to control gating is lighted and is obtained flicker, in fact, generally is not to be the independent working station indicator of each IC-card configuration.
Generally speaking, the RST of IC-card and I/O port are more suitable for time-sharing multiplex, particularly have more realistic meaning for the RST of the CPU card that uses the asynchronous communication agreement and the time-sharing multiplex of I/O interface.For convenience, the present invention only provides the RST of realization IC-card and the time-sharing multiplexing method of two interface end of I/O.In fact, no matter whether the RST of IC-card and other port outside the I/O and control signal adopt time-sharing multiplex, all should belong to claim scope of the present invention.
Electronic switch can be selected the integrated circuit that finds easily on the market for use, for example various bidirectional analogs or digital switch circuit, for example CD4051, CD4052, CD4053 and CD4066, perhaps bi-directional data selector circuit, for example MC14529 also can use logical circuit to make up the function of electronic switch.
Below in conjunction with drawings and Examples technology of the present invention is realized being described further.
Description of drawings
Fig. 1 is the schematic diagram of realization time-sharing multiplex IC-card interfacing equipment embodiment 1 of the present invention;
Fig. 2 is the schematic diagram of realization time-sharing multiplex IC-card interfacing equipment embodiment 2 of the present invention.
Embodiment
Embodiment 1: the circuit theory diagrams of the interfacing equipment of four IC-card time-sharing multiplexs that the MC14529 data selector chip that is to use Motorola Inc. shown in Figure 1 is realized, adopt a slice MC14529 chip and four MCU ports, realized the time-sharing multiplex of four IC-card interfaces.Wherein C0 is the microcontroller MCU or the application-specific integrated circuit card chip (for example ASIC) of operation IC-card; C10 is two groups of on-off circuits of a data selector switch, is respectively C101 and C102, forms the application model of two four-ways; C20, C21, C22 and C23 are the RST and the I/O interfaces of four IC-cards.MCU has realized four IC-card time-sharing multiplex MCU or the RST of application-specific integrated circuit card chip and the technique effect of I/O port by control data selector switch C10.
Data selector circuit C10, except the power supply that do not mark,, other controls and data terminal define and functions of use as follows:
A, B: control input end CI (Control Inputs), the switching I/O end SIO (Switch In/Out) that controls public I/O end CIO (CommonIn/Out) and a certain way switch is communicated with, and starts a certain passage work at this by MCU or application-specific integrated circuit card chip controls;
Z, W: public I/O end CIO (Common In/Out) is connected with the I/O end with the RST of MCU operation IC-card respectively, finishes the operation to some IC-cards under the control of MCU.In fact, two public I/O ends of Z and W can exchange.
ST
X, ST
Y: gating control end (Strobe X, Strobe Y), the mode of operation of control X and Y passage is set binary channels data selector mode of operation for, when one of them is low level when all being high level, set single channel data selector mode of operation, be arranged to high impedance status during all for low level.At this, be fixed and be arranged to high level, data selector is arranged to two four-way mode of operations of C101 electronic switch passage 2 and C102 electronic switch passage 1.
X0, X1, X2, X3 and Y0, Y1, Y2, Y3 switch I/O end SIO (Switches In/Out), constitute X0-Y0, X1-Y1, X2-Y2 and four groups of data selector channel of X3-Y3, be connected with the I/O interface with C20, C21, C22 and the RST of four IC-cards of C23 representative respectively.
The truth table of two four-way data selectors is as follows:
| ST X | ST Y | B | A | Z | W |
| 1 | 1 | 0 | 0 | X0 | Y0 |
| 1 | 1 | 0 | 1 | X1 | Y1 |
| 1 | 1 | 1 | 0 | X2 | Y2 |
| 1 | 1 | 1 | 1 | X3 | Y3 |
From top truth table as can be known, when different B, A logical combination are set, can reset to C20, C21, C22 and four IC-cards of C23 respectively and operation such as read-write by X0-Y0, X1-Y1, X2-Y2 and X3-Y3.
In order to keep and the duty of the IC-card of the switch I/O end of gating not, be provided with two 4 resistor chain C30 and C31 respectively as pull-up resistor at each switch I/O end, can use discrete resistance or use one eight resistor chain in concrete the enforcement as pull-up resistor, make that the switch output/output terminal of gating can not keep high level state, so that behind gating, can continue to carry out the operational order of back.
Embodiment 2: 5 ports that are to use two MC14529 of Motorola Inc. data selector (DataSelector) chips and MCU shown in Figure 2, the circuit theory diagrams of the interfacing equipment of eight IC-card time-sharing multiplexs of realization.Wherein C0 is the microcontroller MCU or the application-specific integrated circuit card chip (for example ASIC) of operation IC-card; C10 and C11 are two data selection circuits, form the application model of two list eight passages; C20, C21, C22, C23, C24, C25, C26 and C27 are the RST and the I/O interfaces of eight IC-cards.MCU realizes eight IC-card time-sharing multiplex MCU or the RST of application-specific integrated circuit card chip and the technique effect of I/O by data selector combinational circuit C10, C11.
Data selector circuit C10, C11, except the power supply and ground that do not mark, other controls and data terminal definition and functions of use are as follows:
A, B: control input end CI (Control Inputs) controls public I/O end and a certain way switch I/O end and is communicated with, and starts a certain passage work at this by MCU or application-specific integrated circuit card chip controls;
Z, W: public I/O end CIO (Common In/Out), under single eight passage mode of operations, Z, the W of data selector C10 linked together to be connected with the RST end of MCU operation IC-card; Z, the W of data selector C11 linked together to be connected with the I/O end of MCU or application-specific integrated circuit card chip operation IC-card, finishes the operation to some IC-cards.
ST
X, ST
Y: gating control end (Strobe X, Strobe Y), the mode of operation of control X and Y passage is set binary channels data selector mode of operation for, when one of them is low level when all being high level, set single channel data selector mode of operation, be arranged to high impedance status during all for low level.In order to reduce the control port quantity of MCU or application-specific integrated circuit card chip, use phase inverter C100 to ST
YThe control signal negate so only needs to use three MCU or application-specific integrated circuit card chip port to control the ST of electronic switch respectively
Y, B and A, C10 electronic switch 1 and C11 electronic switch 2 are set the mode of operation of single eight passages, can realize the time-sharing multiplex of eight IC-card RST and I/O interface.In fact, also can use the port of independent MCU or application-specific integrated circuit card chip to control ST respectively
XAnd ST
Y, and do not use the phase inverter of C100.
The truth table of single eight channel data selectors is as follows:
| ST X | ST Y | B | A | Z/W |
| 1 | 0 | 0 | 0 | X0 |
| 1 | 0 | 0 | 1 | X1 |
| 1 | 0 | 1 | 0 | X2 |
| 1 | 0 | 1 | 1 | X3 |
| 0 | 1 | 0 | 0 | Y0 |
| 0 | 1 | 0 | 1 | Y1 |
| 0 | 1 | 1 | 0 | Y2 |
| 0 | 1 | 1 | 1 | Y3 |
X0, X1, X2, X3, Y0, Y1, Y2 and Y3: switch I/O end SIO (Switches In/Out), constitute X0-X0, X1-X1, X2-X2, X3-X3, Y0-Y0, Y1-Y1, Y2-Y2 and Y3-Y3 totally eight groups of data selector channel, be connected with the I/O interface with the RST of eight IC-cards respectively.
In order to keep and the duty of the IC-card of the switch I/O end of gating not, be provided with two 8 resistor chain C30 and C31 respectively as pull-up resistor at each switch I/O end, can use discrete resistance as pull-up resistor in actual the enforcement, make that the switch output/output terminal of gating can not keep high level state, so that behind gating, can continue to carry out the operational order of back.
Above embodiment 1 and embodiment 2 have just provided and have used the MC14529 circuit to realize the embodiment of four and eight IC-card interface time sharing multiplexes.Wherein be labeled in RST on MCU or the application-specific integrated circuit card chip port and be meant the reset output terminal of (RST) of operation IC-card, I/O is meant operation IC-card half-duplex I/O end.For convenience of description, this do not provide each IC-card power supply,, clock, snap into the position and other control signals, do not provide yet MCU or application-specific integrated circuit card chip clock, power supply, with other input/output end ports, comprise interfaces such as RS232, USB with computing machine or other microprocessor.
In fact, described MCU or application-specific integrated circuit card chip (for example ASIC) can directly be connected with electronic switch, also can be connected with electronic switch by other devices; Except data selector and analog switch, also can select the electronic switching circuit of other similar functions for use; SIO end for electronic switch has the situation of built-in pull-up resistor, pull-up resistor that can be external; Also can realize non-2
NThe time-sharing multiplex of number of I C card perhaps uses the independently IC-card interface of IC-card interface and time-sharing multiplex simultaneously; For 2
NThe time-sharing multiplex of individual IC-card interface, according to the configuring condition of electronic switch and other peripheral circuits, the control port quantity of employed MCU or application-specific integrated circuit card chip can less than, be equal to or greater than N; According to application need, can also realize the RST of IC-card, the time-sharing multiplex of other coherent signals outside the I/O.
Claims (7)
1. the IC-card interfacing equipment of a time-sharing multiplex, comprise the microprocessor MCU that realizes the IC-card communications protocol or application-specific integrated circuit card chip, IC-card interface, it is characterized in that between described MCU or special-purpose IC-card interface chip and IC-card interface, electronic switch being set, (1) the public I/O end CIC of electronic switch is connected with the I/O port with the RST that resets of described MCU or application-specific integrated circuit card chip operation IC-card respectively, finishes the operation to IC-card; (2) the switching I/O end SIO of electronic switch is connected with the interface of IC-card respectively, is formed for operating the RST of IC-card and the port of I/O; (3) MCU or application-specific integrated circuit card chip are used to operate the RST of IC-card and the port of I/O is connected with the control input end CI of electronic switch by described, the public I/O end CIO of control electronic switch switches with the timesharing of switching I/O end SIO, make and in section sometime, have only IC-card interface to use the port resource of MCU or application-specific integrated circuit card chip, realize the time-sharing multiplex of an above IC-card interface.
2. the IC-card interfacing equipment of time-sharing multiplex according to claim 1, being used to of it is characterized in that being connected with the public I/O end CIO of electronic switch operated the port of the I/O of IC-card, be special-purpose COM port or the general purpose I/O port that uses software programming, MCU or special-purpose IC-card interface chip pass through RS232, USB and computing machine communication.
3. the IC-card interfacing equipment of time-sharing multiplex according to claim 1 and 2, it is characterized in that the built-in or external pull-up resistor of switching I/O end SIO at the electronic switch that is connected with the I/O end with the RST of IC-card, make it in not by gating, be in high level state, keep the duty of the RST and the I/O end of the IC-card of gating not, make it by gating the time, continue the follow-up IC-card operational order of execution.
4. the IC-card interfacing equipment of time-sharing multiplex according to claim 1 and 2, it is characterized in that described IC-card interfacing equipment is to can be used for connecting the IC-card card reader that computing machine uses, also can be used for the IC-card terminal that off line is used, also can be used for the IC-card application apparatus of various special uses.
5. the IC-card interfacing equipment of time-sharing multiplex according to claim 1 and 2 is characterized in that except IC-card RST and I/O end, comprises that the signal that snaps into position, power supply control, duty indication also adopts the time-sharing multiplex working method.
6. the IC-card interfacing equipment of time-sharing multiplex according to claim 1 and 2, it is characterized in that using in principle the control input end CI of N MCU or application-specific integrated circuit card chip port control electronic switch, add the RST of MCU or application-specific integrated circuit card chip operation IC-card and 2 ports of I/O, can realize 2
NThe time-sharing multiplex of individual IC-card RST and I/O interface is on concrete the enforcement, for 2
NThe time-sharing multiplex of individual IC-card interface, configuring condition according to employed electronic switch and peripheral circuit, the quantity of employed control port from MCU or application-specific integrated circuit card chip can less than, be equal to or greater than N, also can on a MCU or application-specific integrated circuit card chip, both use IC-card interface independently also to use the IC-card interface of time-sharing multiplex.
7. the IC-card interfacing equipment of time-sharing multiplex according to claim 1 and 2 is characterized in that the used circuit that switch switches of can realizing comprises: MC14529 data selector integrated circuit; CD4051, CD4052, CD4053, CD4066 analog switching circuit; The two-way switch circuit of forming by triode or logic gates.
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| CN2006100910159A CN1949164B (en) | 2006-07-10 | 2006-07-10 | Time-division multiplexing IC card interface equipment |
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| CN2006100910159A CN1949164B (en) | 2006-07-10 | 2006-07-10 | Time-division multiplexing IC card interface equipment |
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| CN1949164B true CN1949164B (en) | 2010-04-21 |
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| CN102520272B (en) * | 2011-11-24 | 2015-07-15 | 大唐微电子技术有限公司 | Test system of power down protection function of smart card and method |
| CN102608478B (en) * | 2012-03-31 | 2014-09-03 | 成都因纳伟盛科技股份有限公司 | Bluetooth chip quick detection system |
| CN105096874B (en) * | 2015-08-12 | 2017-10-17 | 武汉华星光电技术有限公司 | A kind of GOA circuits, array base palte and liquid crystal display |
| CN107436853B (en) * | 2016-05-28 | 2020-06-19 | 深圳市京泉华科技股份有限公司 | Control method of USB Type-C/PD connector |
| CN106569973B (en) * | 2016-10-25 | 2019-09-17 | 深圳市科陆精密仪器有限公司 | Serial Peripheral Interface (SPI) multiplexing method and communication system |
| CN107481674B (en) * | 2017-08-14 | 2020-04-28 | 深圳市华星光电半导体显示技术有限公司 | Display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5298724A (en) * | 1989-08-25 | 1994-03-29 | Klockner-Moeller Gmbh | Method for operating installations comprising chip-card-driven control systems |
| CN1165354A (en) * | 1995-12-14 | 1997-11-19 | 株式会社日立制作所 | Multichip integrated circuit (IC) card and IC card system using IC |
-
2006
- 2006-07-10 CN CN2006100910159A patent/CN1949164B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5298724A (en) * | 1989-08-25 | 1994-03-29 | Klockner-Moeller Gmbh | Method for operating installations comprising chip-card-driven control systems |
| CN1165354A (en) * | 1995-12-14 | 1997-11-19 | 株式会社日立制作所 | Multichip integrated circuit (IC) card and IC card system using IC |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100421 Termination date: 20200710 |