Method for integrating multiple data transmission interfaces on smart card and novel smart card

Abstract

The invention is related to design and application of smart card with multiple transmission interfaces in high speed. Based on communication protocol of ISO / IEC7816 interface, the technical scheme carries out signal multiplexing for pins C4,C6,C8 unused by signal of ISO / IEC7816 interface. Multiple transmission interfaces in high speed are integrated in the three pins. Using dual bus structure, the scheme carries out control and transmission for data interface in high speed and ISO / IEC7816 interface. Data interface in high speed and ISO / IEC7816 interface can work by itself / independently, or can transfer data simultaneously / synergetically. Identifying interface signal of data in high speed, the scheme determines types of interface and communication protocol, as well as switch on / off relevant working circuits of interface. Features are: high compatibility so as to increase serviceable range, and convenience of use.

Description

technical field [0001] The invention belongs to the design and application fields of smart cards and integrated circuit chips thereof, and in particular relates to a method for integrating multiple data transmission interfaces on smart cards and a new smart card. Background technique [0002] A smart card, also called an IC card, is a card that has an integrated circuit chip with storage, encryption and data processing capabilities embedded in a plastic substrate. There are many types of smart cards, which can be divided into two categories: memory card and microprocessor card according to the embedded chip; according to the data transmission form between the card and the outside world, it can be divided into two types: contact type and non-contact type. The smart card in the present invention refers to a contact-type microprocessor card, including a SIM card in the GSM system, a UIM card in the CDMA system, a PIM card in the PHS system, and a USIM card in the 3G system. Th...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for integrating multiple high-speed data interfaces on the basis of the ISO / IEC7816 interface of the smart card for the problems of low external data transmission rate, single interface, and limited application field and scope of the traditional smart card, so that The ISO / IEC7816 interface and any other high-speed data interface can work alone / independently, or simultaneously / cooperatively; at the same time, it can flexibly select and control the opening or closing of the high-speed data interface according to the external input high-speed data interface signal and type. Turn off, also can flexibly select and control the opening or closing of the high-speed data interface through the ISO / IEC7816 interface signal, and reduce the power consumption of the smart card by controlling the working modes of various interfaces; at the same time, the present invention will also provide the above-mentioned method. new smart card

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