CN2606403Y

CN2606403Y - Universal card reader

Info

Publication number: CN2606403Y
Application number: CN 03212242
Authority: CN
Inventors: 尹继学
Original assignee: Harbin Synjones Electronic Co ltd
Current assignee: Harbin Synjones Electronic Co ltd
Priority date: 2003-03-26
Filing date: 2003-03-26
Publication date: 2004-03-10
Anticipated expiration: 2013-03-26

Abstract

The utility model discloses an all-purpose card reader, namely a non-contact IC card reader which is a novel peripheral device collaborated with standard computer. The utility model provides two operation modes with serial port and USB port to satisfy demands of different users, especially in locations with a large population flow. By adjusting the elements and the structure parameter of the card chip and the antenna unit, the reliability of card reading is highly improved. The utility model comprises a special communication cables and ports, a CPU unit (5), a reset circuit (6) and a card reading unit. The utility model has the characteristics that the special communication cables are a USB cable (1) and a special 232 serial port (2); that the special ports are 232 ports (30) and a USB port (4); and that the card reading unit consists of peripheral elements of the carding reading chip (7) and an antenna (8).

Description

Versatile card reader

Affiliated field

The utility model relates to a kind of standard PC peripheral hardware, specifically is exactly by computer control, can finish the reader device of non-contact IC card card image read-write operation.

Background technology

Noncontact jig information storage is big, data security is strong and card itself can waterproof, the characteristics of fouling resistance wearing and tearing long service life; It will be the information carrier of future ideality; The card reader of Shi Yonging mostly is a serial ports in the market, and read or write speed is slow, is difficult to meet the demands when flow of the people is big.

Technical scheme

The utility model purpose is to disclose a kind of versatile card reader, and promptly the contactless ic card reader is a kind of novel computer peripheral hardware that is used with standard computer.Serial ports and USB can be provided two kinds of modes of operation simultaneously,, be specially adapted to the big occasion of flow of the people to satisfy requirements of different users.By adjusting the device and the structural parameters of Card Reader chip and antenna element, make the Card Reader reliability obtain effective raising.

The utility model comprises: special-purpose connection and special-purpose interface, CPU element 5, reset circuit 6 and card reading unit is characterized in that special-purpose connection and special-purpose interface are USB line 1, special-purpose 232 Serial Port Lines, 2,232 interfaces 3, USB interface 4;

Described card reading unit comprises Card Reader chip 7 peripheral components and antenna 8.

Described CPU element 5 is that 8 single-chip microcomputers are 89C52, has 256 byte RAM and 8K FLASH, and 48 I/O mouths are comprising the serial ports pin.Described reset circuit 6 includes watchdog circuit, and its integrated chip is MAX813, and described 232 interfaces, 3 chips are MAX232A, and USB interface 4 chips are CY63001A, and Card Reader chip 7 is MIFARE MCM200.

Its feature of the utility model also is: the Card Reader chip is accepted cpu instruction and is converted simulating signal to and send antenna element 8 to by 20 (ANT), 21 (ANT) pin, and finishes read-write to the contactless IC card card image by antenna element, and aerial signal is through resistance R ₄, capacitor C ₁₅C ₁₆C ₁₇With inductance component L ₁Amplification of forming and shaping circuit are accepted by 17 (RX) pin of MCM200, send CPU by the processing of Card Reader chip and with ready data to by data line; By serial port pin 11 (RXD), 13 (TXD) and the MAX232 serial ports level transferring chip and the peripheral components of CPU element 5, finish card reader through 232 special-purpose Serial Port Lines 2 at last and be connected with computer by serial, realize the serial communication of card reader and computing machine; P1 mouth by CPU element 5 and the P0 mouth of P3.2, P3.3 and P2.5, P2.6 and USB interface 4 chip CY63001A and P1.0, P1.1, P1.2, P1.3 constitute asynchronous parallel port communication, and, finish the USB communication of card reader and computing machine by USB interface pin one 3 (D+), 14 (D-) are connected card reader and computing machine with special-purpose USB line USB.

Description of drawings

Fig. 1 is the overall construction drawing of the utility model system;

Fig. 2 is circuit theory diagrams of the present utility model;

Embodiment

As shown in Figure 2: CPU element is the core of card reader, finishes control and other operations that peripheral chip comprises house dog 232 communication USB communications and Card Reader chip.The clock that CPU operation needs is provided by the U4 crystal oscillator, 8 single-chip microcomputer 89C52 and watchdog reset circuit MAX813.Single-chip microcomputer is finished various operations and control function.Watchdog circuit guarantees reliable reset when CPU is subjected to external interference or other accidents and causes the program abnormal running, restart routine is normally moved.Reset and watchdog function has MAX813 to provide, after MAX813 powered on, its counter was started working, and at this moment P2.4 (both 6 pin of MAX813) goes up level and do not change, and after counter overflows, can export reset pulse on its 7 pin, starts CPU work; In program just often, should be program appropriate location timing reset house dog, in order to avoid cause program run undesired; If disturb in the running program running process or other factors cause the program irregular operating, just can not the timing reset house dog, cause that house dog is overtime to be resetted, can allow program restart, normally move.

If adopt 232 modes to connect, the data that CPU sends are sent with the mode of serial by TXD (11 pin), carry out level conversion through MAX232A, deliver to computer by serial, are received by computing machine.Equally, the serial data of being sent by computing machine through level conversion, is delivered among the CPU by RXD and to be received, and can realize the exchanges data of CPU and computing machine thus.

If adopt the USB mode to connect, the data that CPU sends are sent by the P1 mouth is parallel, behind the DSR, the P2.5 that resets after CY63001A detects low level signal, takes data away, send simultaneously and interrupt application INT0, notice CPU can send next data, so finishes the transmission of director data; The data that USB receives through handling the P0 mouth (the P1 mouth of CPU) of delivering to CY63001A, are applied for interrupt INT 1 simultaneously, and notice CPU can take data away.After CPU took data away, the P2.6 that resets after CY63001A detects reset signal, can send next data, can receive each data and instruction that computing machine sends like this, realized that USB connects.

As shown in Figure 2, CPU visits Card Reader chip MCM200 with the mode of bus, because the sheet of Card Reader chip choosing end is a ground connection, can visit with the 0XFF00 address.Like this, CPU just can send various instructions to the Card Reader chip.After the Card Reader chip receives order, give antenna element by antennal interface 2021 and peripheral components; Can obtain card image by antenna; The card image that obtains is amplified shaping by antenna and capacitance-resistance and inductance, by RX (reception of MCM200 17 pin), finishes the conversion of data by the Card Reader chip, delivers to CPU more according to demand, has so just finished the read-write process of card image.

Utility model has the following advantages:

1,232 and two kinds of connected mode applying flexibles of USB

The utility model-versatile card reader and computer have two kinds of connected modes: 232 modes With the USB mode. 232 modes can be used for not supporting the computer of USB; And USB mode, then tool Fireballing advantage is arranged, can be used in the big occasion of flow of the people. As: machine room and library etc.

2, information privacy is good

The utility model adopts the mode that is cooperated encrypted card generation key by PC, in the time of necessary Different keys can be adopted in each sector of card. Issue by PC when in use, carry The high confidentiality of data.

Claims

1. versatile card reader as computer peripheral equipment, its composition comprises: special-purpose connection and special-purpose interface, CPU element (5), reset circuit (6) and card reading unit is characterized in that special-purpose connection and special-purpose interface are USB line (1), special-purpose 232 Serial Port Lines (2), 232 interfaces (3), USB interface (4); Described card reading unit comprises Card Reader chip (7) peripheral components and antenna (8).

2. versatile card reader according to claim 1 is characterized in that: described CPU element (5) is that 8 single-chip microcomputers are 89C52, has 256 byte RAM and 8K FLASH, and 48 I/O mouths are comprising the serial ports pin; Described reset circuit (6) includes watchdog circuit, and its integrated chip is MAX813; Described 232 interfaces (3) chip is MAX232A; USB interface (4) chip is CY63001A; Card Reader chip (7) is MIFARE MCM200.

3. versatile card reader according to claim 1, it is characterized in that: the Card Reader chip is accepted cpu instruction and is converted simulating signal to and send antenna element (8) to by 20 (ANT), 21 (ANT) pin, and finish read-write to the contactless IC card card image by antenna element, aerial signal is through resistance R ₄, capacitor C ₁₅C ₁₆C ₁₇With inductance component L ₁Amplification of forming and shaping circuit are accepted by 17 (RX) pin of MCM200, send CPU by the processing of Card Reader chip and with ready data to by data line.

4. versatile card reader according to claim 1, it is characterized in that: by serial port pin 11 (RXD), 13 (TXD) and the MAX232 serial ports level transferring chip and the peripheral components of CPU element (5), passing through special-purpose 232 Serial Port Lines (2) at last finishes card reader and is connected the serial communication of realization card reader and computing machine with computer by serial.

5. versatile card reader according to claim 1, it is characterized in that: P1 mouth by CPU element (5) and the P0 mouth of P3.2, P3.3 and P2.5, P2.6 and USB interface (4) chip CY63001A and P1.0, P1.1, P1.2, P1.3 constitute asynchronous parallel port communication, and, finish the USB communication of card reader and computing machine by USB interface pin one 3 (D+), 14 (D-) are connected card reader and computing machine with special-purpose USB line USB.