Double-interface intelligent card capable of quickly implementing mode selection and implementing method

Abstract

The invention discloses a double-interface intelligent card capable of quickly implementing mode selection and an implementing method. The double-interface intelligent card comprises an analog front end unit for transceiving signals, a digital base band unit for decoding and coding the transceived signals, a micro controller unit (MCU), a state recording circuit and a working mode register, wherein the working mode register is used for correspondingly setting an identification position for the signals of each mode state; when the state recording circuit detects that successfully decoded signals exist in the digital base band unit, the identification position corresponding to the signals in the mode state is set in the working mode register; and the MCU is used for querying the identification information in the working mode register and selecting and determining the current operating mode. Compared with the conventional double-interface intelligent card, the double-interface intelligent card has the advantage of lower power consumption when the implementing mode is quick and quicker. The double-interface intelligent card capable of quickly implementing the mode selection and the implementing method are applied in the field of double-interface intelligent cards.

Description

technical field [0001] The invention relates to a dual-interface smart card and a realization method, in particular to a dual-interface smart card capable of fast mode selection and a realization method. Background technique [0002] A smart card is an IC card containing a microprocessor chip MCU. In terms of appearance, there is no difference between smart cards and ordinary IC cards and radio frequency cards, but the performance has been greatly improved, and the security is much improved compared with ordinary IC cards. Usually, the smart card will contain a random number generator, hardware encryption algorithm, etc., and cooperate with the on-chip operating system, the smart card can reach the security level of the financial level. Smart cards can be used in many fields such as finance, insurance, traffic police, and government industries. They have the characteristics of large user space, fast reading speed, and support for one card with multiple functions, and have p...

AI Technical Summary

Problems solved by technology

With this method, since all the signals pass through the hardware circuit and then enter the COS for judgment, the speed is relatively slow, and some shorter signal frames may even be lost; while the method implemented by the hardware circuit can achieve a very fast selection speed, even when the microprocessor MCU has just been activated, the working mode has been selected, but this method increases the scale of the hardware circuit, resulting in an increase in area and a rise in power consumption

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