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Method for switching working modes of dual interface smart card

A dual-interface smart card and working mode technology, which is applied to record carriers used in machines, instruments, computer components, etc., can solve problems such as card failure

Inactive Publication Date: 2011-06-15
SHANGHAI HUAHONG INTEGRATED CIRCUIT
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At the same time, there are also some defects in the contactless card: when the card is bent excessively during use, it is easy to fail due to the breakage of the internal coil solder joints of the card
[0007] Smart cards with two interfaces have their own working conditions and operating environment requirements in the contact working mode, non-contact working mode and dual-interface working mode. In the application, there will be a problem of switching between the three working modes. For the above problems , it is necessary to propose a method to solve the problem of safe and reliable switching of dual-interface smart cards in multiple working modes, so as to ensure the normal use of dual-interface smart cards in various modes

Method used

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  • Method for switching working modes of dual interface smart card

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Experimental program
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Embodiment Construction

[0018] specific implementation plan

[0019] combined with figure 1 A detailed description of a dual-interface smart card working mode switching method proposed by the present invention:

[0020] The dual-interface smart card system does not set a default working mode during the initial power-on reset, and obtains the working mode of the dual-interface card system according to the received working mode indication signal after the power-on reset is released. When only the contact power supply is added, the low-level reset of the contacts of the contact interface is valid, the system uses the contact clock, and the system enters the contact working mode, as shown in T3 and T6 in the figure. In the current contact working mode, when a non-contact power supply is added, the system does not reset, and the clock is optional, it enters the dual-interface working mode, as shown in T2 on the way. In the current dual-interface working mode, when the system detects that the contact p...

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Abstract

The invention provides a method for switching working modes of a dual interface smart card. In the method, the dual interface card is mutually switched among three application modes, namely a contact type mode, a non-contact type mode and a dual interface mode which are unique to the dual interface card, under working conditions in different modes. A power-on reset mode and a clock switching mode of a system are set according to a working mode in which the initial default is not set, so that the method for switching from the contact type working mode to the dual interface working mode and then from the dual interface working mode to the non-contact type working mode is realized, and a switching process from the initial non-contact type working mode to the dual interface working mode and then the contact type working mode is realized. By the method, seamless transition of the dual interface smart card in various working modes according to an actual application environment requirement can be realized, and the normal work in any mode can be guaranteed.

Description

technical field [0001] The invention relates to a dual-interface smart card technology, in particular to a method for switching working modes of a dual-interface smart card. Background technique [0002] Nowadays, contact smart IC cards (hereinafter referred to as "contact cards") are widely used in people's daily life, such as SIM cards. With the popularization and application of contact cards, there have been many problems in the application. For example, frequent plugging and unplugging of contact cards on the reading and writing equipment will cause wear and tear, which will lead to poor contact of the cards, which will cause data transmission errors, and contact cards and readers Wear between writing devices also greatly shortens the life of the card and the reading and writing device. In addition, the communication rate of the contact card is low, coupled with the delay in inserting and removing the card, it will take a long time to read the card. [0003] There is a...

Claims

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Application Information

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IPC IPC(8): G06K19/07
Inventor 舒海军
Owner SHANGHAI HUAHONG INTEGRATED CIRCUIT
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