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Intelligent card read/write device based on the technology of obtaining power source from the serial port signal line

A technology of power supply and serial port signal, applied in the field of smart card reading and writing devices, can solve the problems of high cost, large size, development cost, high product cost, etc., and achieve the effect of low cost, small size and low power consumption

Inactive Publication Date: 2004-06-23
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the IC card reader-writer based on the PS2 interface needs to occupy the PS2 interface resources (because the keyboard and the mouse have already occupied the PS2 interface); and the IC card reader-writer based on the USB interface has the advantages of no external power supply and easy use, but the development The cost and product cost are relatively high; the existing serial port-based IC card readers on the market do not use the serial port-based electricity stealing technology, and must be connected to an external power supply or obtain power from the PS2 interface, so the cost is high, the volume is large, and the external Complicated wiring

Method used

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  • Intelligent card read/write device based on the technology of obtaining power source from the serial port signal line
  • Intelligent card read/write device based on the technology of obtaining power source from the serial port signal line
  • Intelligent card read/write device based on the technology of obtaining power source from the serial port signal line

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Embodiment Construction

[0013] The whole design of the smart card reading and writing device based on getting power from the serial port is divided into two parts: hardware design and software design.

[0014] The ISO / IEC 7816 standard requires IC cards and IC card readers to use serial communication, and the timing requirements are very strict. The commonly used MCS51 series single-chip microcomputer is relatively slow, and each instruction cycle needs 12 machine cycles, so it is difficult to meet the strict timing required by the standard. MicroChip's PIC series single-chip microcomputer adopts RISC structure, and each instruction cycle is 4 clock cycles, and all instructions except transfer instructions can be completed within one instruction cycle, which is fast and can meet the strict requirements of the standard on timing. Therefore, the reader uses a PIC microcontroller as the controller of the IC card reader.

[0015] The communication between the reader and the IC card adopts the half-duple...

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Abstract

The intelligent card read / write device includes IC card seat to obtain power source from RS232 interface via power source converter chip; monochip computer for reading and writing of the intelligent IC card; and vibrator to provide the IC card and the read / write device. The intelligent IC card read / write device of the present invention has small volume, low cost, low power consumption and other features.

Description

technical field [0001] The invention relates to a smart card reading and writing device, in particular to a smart card reading and writing device based on the technology of obtaining power from a serial port signal line. Background technique [0002] As a kind of information security technology, IC card is widely used in many industries, such as finance, telecommunications and other fields. Different fields have their own different application characteristics, application environments, and application requirements. The application of IC cards in a certain field must adapt to the characteristics of the field. Relevant international organizations and departments have formulated application standards for the application of IC cards in a certain field according to the different requirements of various fields. However, all smart IC cards must comply with the ISO / IEC 7816 international standard of the International Organization for Standardization. The hardware of the reader must...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/00G06K7/00
Inventor 罗海勇李锦涛施振川崔凤江王非
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI