A kind of multi-function SIM card, its operation method and terminal

Abstract

The present invention relates to a multifunctional SIM card, a card operating method and a terminal. The multifunctional secure SIM card multiplexes the second protocol pins on the 6-pin interface defined by the ISO7816 protocol and adds two extended second protocols. The function of the SIM card or the second protocol card is realized by means of pins; after external power is applied, when the detected clock frequency is below 5MHZ, start the low-speed protocol interface and enter the SIM card working mode; otherwise, start the high-speed protocol interface and enter SD card working mode; the terminal is provided with a SIM card reading module, a 7816 protocol interface and a second protocol interface module, and the SIM card reading module includes at least 8 contact patches, and the 8 contact patch reading The signals transmitted by the 8 contacts of the multifunctional security SIM card are obtained. The present invention can be applied in various fields such as the Internet of Things, mobile finance, and mobile office.

Description

Technical field [0001] The present invention relates to the field of computers and mobile communication, and more particularly to a multi-function safety SIM card, a card operating method and a terminal. Background technique [0002] Traditional mobile phone SIM card follows the Smart Card Industry Standard ISO7816 protocol, which is generally divided into several versions of 8KB, 16KB, 32KB, 64KB, 128KB, 32KB, 64KB, 128KB, and 512KB. The high-specific SIM card of NFC business, and the capacity can only reach a gaming . This storage capacity is unable to support the business development of telecom operators and the application needs of the final customer. The current practice is the use of SIM card extensions (such as Micro-SD card, also known as TF card). To increase storage capacity, the problem brought about by CN100474868C, CN1004877728C, CN1004877728C, CN101566980A, etc. have been fully explained, and will not be described herein, therefore it is necessary to develop a new S...

AI Technical Summary

Problems solved by technology

This kind of storage capacity cannot well support the business development of telecom operators and the application requirements of end customers. At present, a transitional approach is to use expansion cards other than SIM cards (such as Micro-SD cards, also known as TF cards). To increase the storage capacity, the problems brought by this method have been fully elaborated in existing documents such as CN100474868C, CN100487728C, CN101566980A, and will not be repeated here. Therefore, it is necessary to develop a new SIM card so that it can It supports basic telecom operation services, and can meet the storage capacity required by customer application requirements, and at the same time can adapt to the current rapid development needs of the Internet of Things, mobile finance, mobile payment, and industry mobile office security

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