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Conversion method for double interface IC card contact type/non-contact type working mode

A non-contact, working-mode technology, applied to record carriers used by machines, instruments, induction record carriers, etc., can solve problems such as difficulty in ensuring correct conversion

Inactive Publication Date: 2005-09-07
SHANGHAI HUAHONG INTEGRATED CIRCUIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The design and production of dual-interface IC cards include some key technologies. Among them, the conversion of contact / non-contact working mode is one of the bottlenecks in the development of its technology. It is difficult to ensure and easily convert the two working modes correctly.

Method used

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  • Conversion method for double interface IC card contact type/non-contact type working mode
  • Conversion method for double interface IC card contact type/non-contact type working mode

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0007] As shown in Figure 1, the conversion method of the contact type / non-contact mode of operation of dual-interface IC card of the present invention comprises the following steps:

[0008] When the system is powered on and reset, it works on the non-contact interface by default;

[0009] Determine whether there is a contact reset signal:

[0010] If so, the system will switch to the contact mode of operation, and the system will still work in the contact mode regardless of whether a non-contact field strength (ie: radio frequency electromagnetic field) is generated during the contact transaction. If the IC card is pulled out, When the radio frequency electromagnetic field is still maintained, it is still in the contact mode but the contact transaction is stopped, and no contactless transaction will be carried out; when the radio frequency electromagnetic field jumps, it will switch to the non-contact working mode for contactless transaction;

[0011] If not, the system mai...

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Abstract

The contact mode / non-contact mode conversion method for double-interface IC card includes: setting the default non-contact mode in power-on reset; judging whether to have contact reset signal; converting the system into contact mode if yes, and maintaining the system in contact trade state even if non-contact field strength appears; withdrawing the IC card while maintaining the RF field strength to maintain the contact mode while stopping contact trade; switching to non-contact mode for non-contact trade via jumping RF field strength; maintaining the non-contact mode of the system if no contact reset signal; and inserting into contact card reader to make the system convert into contact mode under the action of the contact clock and reset signal and making the software operation system into reset state and contact trade. The present invention realizes the seamless transition between the contact system and the non-contact system.

Description

technical field [0001] The invention relates to a conversion method of a contact-type / non-contact-type working mode of a dual-interface IC card. Background technique [0002] In recent years, with the rapid development of technology and economy, economic and information exchanges between people have become more frequent and the amount of information has increased. The original contact IC card can no longer meet the fast-paced needs of modern society. The contact method is that the card obtains power energy and clock through the contact card reader, and exchanges data through the IO (input output) port. Although it plays an irreplaceable role in our life, it is popular in the contact IC card. In the process, its inevitable weaknesses are exposed, such as: the wear of the contacts due to the harsh use environment leads to an increase in the misreading rate, the transmission of data errors due to poor contact, and the long transaction time due to the low speed of inserting and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/08G06K19/07
Inventor 高静
Owner SHANGHAI HUAHONG INTEGRATED CIRCUIT
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