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Connector between processor and user recognition card

A technology of user identification card and connection device, which is applied in the field of communication, can solve the problems of large area, high cost, and high power consumption, and achieve the effect of reducing area and cost

Active Publication Date: 2006-05-10
LEADCORE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a connection device between a processor and a USIM card to solve the problem of large power consumption, large area and high cost of the connection device using a SIM controller to establish communication between a processor and a USIM card in the prior art technical issues

Method used

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  • Connector between processor and user recognition card
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  • Connector between processor and user recognition card

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] UART (Universal Asynchronous Receiver Transmitter Universal Asynchronous Receiver Transmitter) is a widely used serial data transmission protocol. It is mainly composed of data bus interface, control logic, baud rate generator, sending part and receiving part in structure. The data transmitted on the USIM card has many similarities with the data transmitted by the UART standard. see figure 2 , which is a schematic diagram of comparing the data format transmitted on the USIM card with the data format transmitted using the UART standard.

[0029] Through the above comparison, it can be seen that their 1 frame data is composed of 1 bit (bit) start bit, 8 data bits 1BIT parity bit (PARITY BIT), and guard time / stop bit (greater than or equal to 2BIT). The two are basically the same in the data format and timing of the transmitted data. The main differences betw...

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Abstract

The invention discloses a processor and a connection device between user identification card (USIM). The processor comprises a universal asynchronous receiver interface which comprises at least data sending data terminal and data receiving terminal. The connection device comprises interface converting unit which is connected with the UART interface of the processor and USIM card separately for establishing communication between UART interface and USIM card, and completing the conversion between UART double lines single direction receiving and transmitting signal and USIM single line double directions receiving and transmitting signal. The invention has the advantages of having lower cost.

Description

technical field [0001] The invention relates to a connection device arranged between a processor and a subscriber identification card in the communication field, in particular to a connection device between a processor and a subscriber identification card (SIM, Subscriber Identify Module or USIM UserService Identity Module). Background technique [0002] With the evolution of mobile communication technology, the importance of the mobile terminal industry has also increased. As a result, many domestic and foreign companies are aiming at the future 3G (third generation mobile communication) mobile terminal market with huge market potential. Although the development of 3G mobile terminals is a recognized development problem, there are still many companies making unremitting efforts to develop various services of mobile terminals in order to continuously launch new products to meet user needs. [0003] In the development process of the mobile terminal, various tests need to be ...

Claims

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Application Information

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IPC IPC(8): G06F13/38H04Q7/32
Inventor 王海龙
Owner LEADCORE TECH
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