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Time-division multiplexing IC card interface equipment

A time-division multiplexing, card interface technology, applied in the direction of input/output to the record carrier, etc., can solve the problems of increasing cost, occupation, and prolonging the product development cycle.

Inactive Publication Date: 2010-04-21
大庆英辰创新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the interface device that can operate multiple IC cards, the most common implementation scheme is to independently implement the interface operation of multiple IC cards through the dedicated or general-purpose port of the MCU in the IC card interface device, which takes up more MCU resources. Especially for an MCU that only supports one or two IC card operations, expanding the number of IC card interfaces requires transplanting software and hardware on an MCU with more interface resources, which increases the cost of the MCU on the one hand, and prolongs the product development cycle

Method used

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  • Time-division multiplexing IC card interface equipment
  • Time-division multiplexing IC card interface equipment
  • Time-division multiplexing IC card interface equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: figure 1 Shown is the circuit schematic diagram of four IC card time-division multiplexing interface devices implemented by using Motorola's MC14529 data selector chip, using a piece of MC14529 chip and four MCU ports to realize the time-division of four IC card interfaces reuse. Among them, C0 is the microcontroller MCU for operating the IC card or a dedicated IC card interface chip (such as ASIC); C10 is two sets of switch circuits of a data selector, which are respectively C101 and C102, forming a dual-four-channel application mode; C20, C21, C22 and C23 are the RST and I / O interfaces of four IC cards. By controlling the data selector C10, the MCU realizes the technical effect that four IC cards time-division multiplex the RST and I / O ports of the MCU or the dedicated IC card interface chip.

[0023] In the data selector circuit C10, except for the unmarked power supply and ground, the definition and use functions of other control and data terminals are ...

Embodiment 2

[0032] Example 2: figure 2 Shown is the circuit schematic diagram of an interface device that implements time-division multiplexing of eight IC cards using two Motorola MC14529 DataSelector chips and five ports of the MCU. Among them, C0 is the microcontroller MCU for operating the IC card or a dedicated IC card interface chip (such as ASIC); C10 and C11 are two data selection circuits, forming two single eight-channel application modes; C20, C21, C22, C23, C24, C25, C26 and C27 are the RST and I / O interfaces of eight IC cards. The MCU realizes the technical effect that eight IC cards time-division multiplex the RST and I / O of the MCU or the dedicated IC card interface chip through the data selector combined circuits C10 and C11.

[0033] Data selector circuits C10 and C11, except for the unmarked power supply and ground, the definition and usage functions of other control and data terminals are as follows:

[0034] A, B: control input terminal CI (Control Inputs), control ...

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Abstract

The invention relates to IC card interface device used fewer interface resource to realize multiple IC cards time sharing operation and multiplexing. Its technical proposal includes the following steps: it includes microprocessor MCU or special IC card interface chip, many IC card interfaces for IC card communication accord; its features are that it set one or many electronic switch between the MCU or special IC card interface chip and the IC card interfaces; the common input / output CIO of the electronic switch are respectively connected with the MCU of the special IC card interface chip port;its switching input / output SIO are respectively connected with RST and I / O interface of the IC card; the MCU or the special IC card interface chip is connected with control input CI of the electronicswitch to make them do for only one IC card at a certain moment, realize multiple IC card interfaces time sharing multiplexing.

Description

technical field [0001] The invention belongs to the field of IC card interface devices (Interface Device, IFD), in particular to a multi-interface IC card interface device for time-division multiplexing. The so-called time-division multiplexing refers to the time-division switching of multiple IC card interfaces by controlling the electronic switch circuit including the data selector (Data Selector) by a microcontroller (MCU) or a dedicated IC card interface chip, so that in a certain Only one IC card uses the interface resources of the MCU in a period of time. Background technique [0002] IC card interface equipment refers to any equipment or device that communicates with the IC card, including the IC card reader (Card Reader) used to connect to the computer and the IC card terminal (Terminal) used off-line, and also includes a dedicated IC card Application equipment, such as IC card water, electricity, gas meters, and IC card interface embedded in other general or specia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/08
Inventor 王耀邢小云
Owner 大庆英辰创新科技有限公司