CN104992214A - Intelligent card circuit having automatic physical link selection function - Google Patents
Intelligent card circuit having automatic physical link selection function Download PDFInfo
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- CN104992214A CN104992214A CN201510397796.3A CN201510397796A CN104992214A CN 104992214 A CN104992214 A CN 104992214A CN 201510397796 A CN201510397796 A CN 201510397796A CN 104992214 A CN104992214 A CN 104992214A
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- control module
- carrier band
- intelligent card
- card chip
- intelligent
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Abstract
Provided in the invention is an intelligent card circuit having an automatic physical link selection function. The intelligent card circuit comprises a carrier tape, a switch control module, an intelligent card chip, and a drive control module. The switch control module is respectively connected with the carrier band, the intelligent card chip, and the drive control module. When the carrier band is connected with a card reader externally, the switch control module is connected with the carrier band and the intelligent card chip to carry out communication and communication between the intelligent card chip and the drive control module is disconnected; and when the carrier band is not connected with the card reader externally,, the switch control module is connected with the intelligent card chip and the drive control module to carry out communication and communication between the carrier band the intelligent card chip is cut off.
Description
Technical field
The present invention relates to intelligent cards field, particularly relate to a kind of intelligent cards circuit that there is automatic physical link and select.
Background technology
Along with the high speed development of the network information technology, information security has become very important.Conventional magnetic stripe cacaine is with low content of technology, and information storage amount is little, is easy to be replicated, and is faced with the situation be eliminated.Smart card, especially electronic cards because of its information storage amount large, the high reliability of information record and high security, and the convenient service that can provide multiple channel, will replace used magnetic stripe card gradually.
In prior art, please refer to Fig. 1, intelligent card chip only has one group of communication channel, and the reading terminals of smartcard external and the interior microprocessor of card (usually, the drive control module blocked in interior Micro-processor MCV and Fig. 1 integrates) are all by this communication interface access intelligent card chip.Particularly, the reading terminals outside smart card sets up the connection between the communication interface of intelligent card chip by carrier band, and then access intelligent card chip; Micro-processor MCV is also connected with the communication interface of intelligent card chip simultaneously, and then access intelligent card chip.There is signal conflict between this two paths of signals, even if smart card is not inserted the reading terminals outside card, external disturbance still can seal in the communication interface of intelligent card chip from carrier band, affects the access process of Micro-processor MCV to intelligent card chip.
Such as, because human body surface skin is charged, touch in the process of carrier band at hand, human body with electricity can by path between carrier band and intelligent card chip, seal in the communication interface of intelligent card chip, thus interference is produced to the data communication mouth of intelligent card chip, and data communication mouth is directly connected with Micro-processor MCV, this interference can cause Micro-processor MCV to read the failure of intelligent card chip content.
Summary of the invention
The technical problem to be solved in the present invention how to prevent external disturbance from sealing in the communication interface of intelligent card chip from carrier band, affects the access of Micro-processor MCV to intelligent card chip.
In order to solve this technical matters, the invention provides a kind of intelligent cards circuit that there is automatic physical link and select, comprise carrier band, switch control module, intelligent card chip and drive control module, described switch control module is connected with described carrier band, intelligent card chip and drive control module respectively;
Described switch control module in order to:
When described carrier band is externally connected with card reader, connects described carrier band and communicate with intelligent card chip, and disconnect the communication between described intelligent card chip and drive control module;
When described carrier band is not externally connected with card reader, connects described intelligent card chip and communicate with drive control module, and disconnect the communication between described carrier band and intelligent card chip.
Optionally, the control port of described switch control module is connected with the VDD power contact of described carrier band; Described switch control module further in order to:
Respond the high level signal of described control port, determine that described carrier band is externally connected with card reader;
Respond the low level signal of described control port, determine that described carrier band is not externally connected with card reader.
Optionally, the described intelligent cards circuit with the selection of automatic physical link also comprises flexible display, and described flexible display is connected with described drive control module.
Optionally, the described intelligent cards circuit with the selection of automatic physical link also comprises load module, and described load module is connected with described drive control module.
The present invention increases switch control module between intelligent card chip and carrier band and drive control module, intelligent card chip is connected with drive control module by this switch control module under normal circumstances, so that drive control module reads intelligent card chip content, and intelligent card chip and carrier band disconnect by switch control module, now human body touch carrier band cannot have an impact to visible card function.In the further scheme of the present invention, creatively the VDD power contact of carrier band is introduced as the basis for estimation judging whether to get involved card reader especially, for aspects of which providing convenience, effective solution.
Accompanying drawing explanation
Fig. 1 is the connection diagram of intelligent cards circuit in prior art;
Fig. 2 is the schematic diagram of the first duty that in one embodiment of the invention, intelligent cards circuit connects;
Fig. 3 is the schematic diagram of the second duty that in one embodiment of the invention, intelligent cards circuit connects;
Fig. 4 is the action principle schematic diagram of one embodiment of the invention breaker in middle control module.
Embodiment
Below with reference to Fig. 2, Fig. 3 and Fig. 4, the intelligent cards circuit with the selection of automatic physical link provided by the invention is described in detail, it is optional embodiment of the present invention, can think, those skilled in the art, in the scope not changing the present invention's spirit and content, can modify to it and polish.
The invention provides a kind of intelligent cards circuit that there is automatic physical link and select, comprise carrier band, switch control module, intelligent card chip and drive control module, described switch control module is connected with described carrier band, intelligent card chip and drive control module respectively;
Described switch control module in order to:
When described carrier band is externally connected with card reader, connect described carrier band to communicate with intelligent card chip, and the communication disconnected between described intelligent card chip and drive control module, as shown in Figure 2, switch control module connects side a and b (as shown in the solid line in Fig. 2 breaker in middle control module), disconnects A end and C end (as shown in the dotted line in Fig. 2 breaker in middle control module).
When described carrier band is not externally connected with card reader, connect described intelligent card chip to communicate with drive control module, and the communication disconnected between described carrier band and intelligent card chip, as shown in Figure 3, switch control module connects A end and C end (as shown in the solid line in Fig. 3 breaker in middle control module), disconnects side a and b (as shown in the dotted line in Fig. 3 breaker in middle control module).
For how judging whether carrier band is externally connected with card reader, The present invention gives an optional scheme:
The control port of described switch control module is connected with the VDD power contact of described carrier band; Described switch control module further in order to:
Respond the high level signal of described control port, determine that described carrier band is externally connected with card reader;
Respond the low level signal of described control port, determine that described carrier band is not externally connected with card reader.
Again furthermore, can be described as: switch control module is controlled by the power supply port (VDD mouth) of outside card reader, after smart card inserts card reader, VDD is high level, the VDD power contact of carrier band is connected with card reader power supply port, thus by this power supply port gauge tap control module, now intelligent card chip is connected with carrier band by switch control module, realizes the function of common IC-card; When IC-card leaves card reader, VDD is low level, and now intelligent card chip is connected with drive control module by switch control module, realizes the function of visible card.
Again furthermore, please refer to Fig. 4, which illustrate a concrete logic of this process, set forth for the embodiment of Fig. 4 signal, switch control module side connects 3 contacts of intelligent card chip, and when visible card inserts card reader, controlling mouth VDD is high level, the solid line position of Fig. 3 signal all got to by all switches, and namely 3 contacts of intelligent card chip are connected with 3 contacts of carrier band; When extracting card reader, VDD is low level, and all switches all get to dotted line position, and namely 3 contacts of intelligent card chip are connected with 3 contacts of drive control module.No matter specific implementation why, as long as employ the switching that switch control module achieves communication link, just should be regarded as the optional scheme of the present invention.
The present invention increases switch control module between intelligent card chip and carrier band and drive control module, intelligent card chip is connected with drive control module by this switch control module under normal circumstances, so that drive control module reads intelligent card chip content, and intelligent card chip and carrier band disconnect by switch control module, now human body touch carrier band cannot have an impact to visible card function.In the further scheme of the present invention, creatively the VDD power contact of carrier band is introduced as the basis for estimation judging whether to get involved card reader especially, for aspects of which providing convenience, effective solution.
Claims (4)
1. the intelligent cards circuit that there is automatic physical link and select, it is characterized in that: comprise carrier band, switch control module, intelligent card chip and drive control module, described switch control module is connected with described carrier band, intelligent card chip and drive control module respectively;
Described switch control module in order to:
When described carrier band is externally connected with card reader, connects described carrier band and communicate with intelligent card chip, and disconnect the communication between described intelligent card chip and drive control module;
When described carrier band is not externally connected with card reader, connects described intelligent card chip and communicate with drive control module, and disconnect the communication between described carrier band and intelligent card chip.
2. there is intelligent cards circuit that automatic physical link is selected as claimed in claim 1, it is characterized in that: the control port of described switch control module is connected with the VDD power contact of described carrier band; Described switch control module further in order to:
Respond the high level signal of described control port, determine that described carrier band is externally connected with card reader;
Respond the low level signal of described control port, determine that described carrier band is not externally connected with card reader.
3. have the intelligent cards circuit that automatic physical link is selected as claimed in claim 1, it is characterized in that: also comprise flexible display, described flexible display is connected with described drive control module.
4. have the intelligent cards circuit that automatic physical link is selected as claimed in claim 1, it is characterized in that: also comprise load module, described load module is connected with described drive control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510397796.3A CN104992214B (en) | 2015-07-03 | 2015-07-03 | Smart card circuit with automatic physical link selection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510397796.3A CN104992214B (en) | 2015-07-03 | 2015-07-03 | Smart card circuit with automatic physical link selection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104992214A true CN104992214A (en) | 2015-10-21 |
| CN104992214B CN104992214B (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510397796.3A Active CN104992214B (en) | 2015-07-03 | 2015-07-03 | Smart card circuit with automatic physical link selection |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63262783A (en) * | 1987-04-20 | 1988-10-31 | Toshiba Corp | Portable medium |
| CN1194046A (en) * | 1995-08-25 | 1998-09-23 | 西门子公司 | Chip card |
| JP2013004002A (en) * | 2011-06-21 | 2013-01-07 | Toppan Printing Co Ltd | Ic card |
| CN203070327U (en) * | 2012-12-20 | 2013-07-17 | 天地融科技股份有限公司 | Smart card |
| CN103426401A (en) * | 2013-08-07 | 2013-12-04 | 苏州联兆微电子有限公司 | OLED (Organic Light Emitting Diode) display system applicable to RFID (Radio Frequency Identification) label |
| JP2013257819A (en) * | 2012-06-14 | 2013-12-26 | Toppan Printing Co Ltd | Non-contact communication medium |
| CN103793741A (en) * | 2012-10-31 | 2014-05-14 | 智慧光科技股份有限公司 | Display card with a protection chip |
-
2015
- 2015-07-03 CN CN201510397796.3A patent/CN104992214B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63262783A (en) * | 1987-04-20 | 1988-10-31 | Toshiba Corp | Portable medium |
| CN1194046A (en) * | 1995-08-25 | 1998-09-23 | 西门子公司 | Chip card |
| JP2013004002A (en) * | 2011-06-21 | 2013-01-07 | Toppan Printing Co Ltd | Ic card |
| JP2013257819A (en) * | 2012-06-14 | 2013-12-26 | Toppan Printing Co Ltd | Non-contact communication medium |
| CN103793741A (en) * | 2012-10-31 | 2014-05-14 | 智慧光科技股份有限公司 | Display card with a protection chip |
| CN203070327U (en) * | 2012-12-20 | 2013-07-17 | 天地融科技股份有限公司 | Smart card |
| CN103426401A (en) * | 2013-08-07 | 2013-12-04 | 苏州联兆微电子有限公司 | OLED (Organic Light Emitting Diode) display system applicable to RFID (Radio Frequency Identification) label |
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| Publication number | Publication date |
|---|---|
| CN104992214B (en) | 2021-06-29 |
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