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SIM card control circuit for single-chip dual-mode mobile terminal

A mobile terminal, single-chip technology, applied in the field of SIM cards, to achieve the effect of reducing the number of devices used, reducing software complexity, and reducing costs

Active Publication Date: 2010-09-29
SHANGHAI WINGTECH ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this way, due to the need to control the communication between the CPU and the SIM card controller, the complexity of the mobile phone software is increased; adding an additional chip to the SIM card controller increases the cost and complexity of the circuit

Method used

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  • SIM card control circuit for single-chip dual-mode mobile terminal
  • SIM card control circuit for single-chip dual-mode mobile terminal
  • SIM card control circuit for single-chip dual-mode mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] This method needs to be realized in the whole mobile phone software and hardware.

[0053] At present, the hardware circuit of a single-chip dual-mode mobile phone generally includes the following parts:

[0054] 1. Baseband circuit, including CPU, General Programmable Input Output (GPIO for short), and signal processor (DSP for short);

[0055] 2. RF part, including antenna, RF controller, power amplifier, etc.;

[0056] 3. Power management, including charging part, linear regulator LDO and various voltage supply parts;

[0057]4. Memory (referred to as memory) management, including flash or nand flash control;

[0058] 5. Audio (referred to as AUDIO) management, including speakers, headphones, and microphones;

[0059] 6. Peripheral interface, keyboard, multimedia control, display part;

[0060] 7. SIM card control.

[0061] The implementation of the hardware part of the method is mainly the circuit part controlled by the SIM card in the above hardware system, an...

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PUM

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Abstract

The invention discloses an SIM card control circuit of a single-chip dual-mode mobile terminal, which also comprises a virtual switch; a first power lead foot VCC of a first SIM card and a second power lead foot VCC of a second SIM card are respectively connected with the power lead foot VSIM of the SIM card controller; a first grounding lead foot GND of the first SIM card and a second grounding lead foot GND of the second SIM card are respectively connected with the grounding lead foot GND of the SIM card controller. The circuit and the method of the invention realizes automatically exclusive reading-writing of two SIM cards on the single-chip dual-mode mobile terminal under a set of SIM card control chips through employing some hardware devices and software control.

Description

technical field [0001] The invention relates to a SIM card, in particular to a SIM card control circuit of a single-chip dual-mode mobile terminal. Background technique [0002] With the development of personal mobile communication technology, driven by high-end business people, dual-mode mobile phones have begun to become mainstream. The dual-mode mobile phone meets the needs of some business personnel who often travel on business and uses multiple cards in different regions at the same time; it also meets the needs of white-collar personnel who want to separate private calls from company contacts and use two SIM cards; There are great differences in card tariffs. Using different SIM cards can save costs, and there is also a certain demand. Under these needs, dual-mode mobile phones have a large market. [0003] At present, dual-mode mobile phones on the market generally use two sets of independent chips, that is, the radio frequency, CPU, peripheral devices and power sup...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W88/06
Inventor 李志鹏
Owner SHANGHAI WINGTECH ELECTRONICS TECH
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