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SIM (Subscriber Identification Module) card switching circuit and SIM card switching method

A technology for switching circuits and input modules, applied in electrical components, wireless communication, network data management, etc.

Active Publication Date: 2017-01-25
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a switching circuit and a switching method of a SIM card to solve the problem in the prior art that the SIM card cannot be switched after the smart terminal is shut down

Method used

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  • SIM (Subscriber Identification Module) card switching circuit and SIM card switching method
  • SIM (Subscriber Identification Module) card switching circuit and SIM card switching method
  • SIM (Subscriber Identification Module) card switching circuit and SIM card switching method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] refer to figure 1 , shows a schematic structural diagram of a switching circuit of a SIM card according to Embodiment 1 of the present invention.

[0020] The switching circuit of the SIM card in the embodiment of the present invention is applied to a smart terminal, and the smart terminal has multiple SIM cards, and the multiple SIM cards have NFC functions, and the switching circuit includes:

[0021] Power input 101 , key input module 102 , main chip 103 , NFC chip 104 , control signal module 105 and switch chip 106 .

[0022] The NFC chip 104 includes an interrupt control interface 1041 ; the switch chip includes 106 : a power input interface 1061 , a key input interface 1062 , a first output interface 1063 , a second output interface 1604 , and a control signal input interface 1065 .

[0023] Preferably, the control signal module includes a GPIO signal interface 1051 and a voltage dividing resistor 1052 .

[0024] The power input 101 is connected to the power inp...

Embodiment 2

[0027] still refer to figure 1 , shows a schematic structural diagram of a switching circuit of a SIM card according to Embodiment 2 of the present invention.

[0028] The switching circuit of the SIM card in the embodiment of the present invention is applied to a smart terminal, and the smart terminal has multiple SIM cards, and the multiple SIM cards have NFC functions, and the switching circuit includes:

[0029] Power input 101 , key input module 102 , main chip 103 , near field communication NFC chip 104 , control signal module 105 and switch chip 106 .

[0030] The NFC chip 104 includes an interrupt control interface 1041 ; the switch chip includes 106 : a power input interface 1061 , a key input interface 1062 , a first output interface 1063 , a second output interface 1604 , and a control signal input interface 1065 .

[0031] Preferably, the control signal module includes a GPIO signal interface 1051 and a voltage dividing resistor 1052 .

[0032] The power input 10...

Embodiment 3

[0040] refer to figure 2 , shows a flow chart of a SIM card switching method according to Embodiment 3 of the present invention.

[0041] The SIM card switching method of the embodiment of the present invention is applied in a SIM card switching circuit of an intelligent terminal, the intelligent terminal has multiple SIM cards, and the multiple SIM cards have NFC functions, and the method includes the following steps:

[0042] Step 301: The control signal input interface of the switch chip receives the control signal.

[0043] In the shutdown state, the power input always supplies power to the switch chip, so that the switch chip can still realize the SIM card switching function when the switch chip is turned off.

[0044] Step 302: The switch chip determines the working state of the output interface of the switch chip according to the control signal.

[0045] Wherein, the control signal is a GPIO (General Purpose Input Output, general purpose input / output) signal of the ter...

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PUM

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Abstract

The invention provides an SIM (Subscriber Identification Module) card switching circuit and an SIM card switching method. The SIM card switching circuit is applied to an intelligent terminal which is provided with a plurality of SIM cards, wherein the plurality of SIM cards have NFC (Near Field Communication) functions; and the SIM card switching circuit is characterized by comprising a power input module, a key input module, a master chip, an NFC chip, a control signal module and a switch chip, wherein the NFC chip comprises an interruption control interface, the switch chip comprises a power input interface, a key input interface, a first output interface, a second output interface and a control signal input interface, the power input module is connected with the power input interface of the switch chip, the key input module is connected with the key input interface, the interruption control interface is connected with the first output interface, the master chip is connected with the second output interface, and the control signal module is connected with the control signal input interface. According to the SIM card switching circuit provided by the invention, SIM cards can be switched in a power-off state.

Description

technical field [0001] The invention relates to the field of mobile communication, more specifically, to a switching circuit and a switching method of a customer identification module SIM card. Background technique [0002] At present, there are more and more smart terminals with Near Field Communication (NFC) technology, and NFC functions are divided into card simulation mode, card reader mode, and peer-to-peer mode. [0003] 1. Card emulation mode: In this mode, the mobile phone is equivalent to an integrated circuit (IC) card using radio frequency identification (Radio Frequency Identification, RFID) technology. It can replace a large number of IC cards, including credit cards, shopping mall shopping cards, bus cards, subway cards, access control, bus tickets, tickets and so on. [0004] 2. Peer-to-peer mode (P2P mode): This mode is similar to infrared, and can be used for data exchange, but the transmission distance is shorter, the transmission creation speed is faster,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W8/18
CPCH04W8/183
Inventor 高小文
Owner VIVO MOBILE COMM CO LTD