CN201698443U

CN201698443U - Usb radio frequency card reader

Info

Publication number: CN201698443U
Application number: CN2010202186479U
Authority: CN
Inventors: 刘思洋
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-06-07
Filing date: 2010-06-07
Publication date: 2011-01-05
Anticipated expiration: 2020-06-07

Abstract

The utility model provides a USB radio frequency card reader which comprises a master control module, a USB interface module, a radio frequency reading and writing module and an input and output interface module, wherein the master control module is respectively connected with the USB interface module, the radio frequency reading and writing module and the input and output interface module; the radio frequency reading and writing module can be used for reading and writing an electronic tag in a wireless way; the data is sent into the USB interface module by the master control module; meanwhile, a command can be sent into the radio frequency reading and writing module by a computer through a USB interface; and the input and output interface module can be used for setting the code and displaying the information of the card reader.

Description

The USB radio-frequency card reader

Technical field

The utility model relates to a kind of radio frequency card-reading apparatus, especially a kind of USB radio-frequency card reader.

Background technology

Traditional radio-frequency card reader all adopts serial ports to be connected with computing machine, and still along with the development of computing machine, serial ports appearance on computers is fewer and feweri, and particularly the notebook computer serial ports becomes seldom.

Summary of the invention

For a change above-mentioned traditional single shortcoming of radio-frequency card reader interface, the utility model provides a kind of USB radio-frequency card reader.

The utility model comprises main control module, usb interface module, radio frequency module for reading and writing, input/output interface module, it is characterized in that, main control module respectively with usb interface module, radio frequency module for reading and writing, input/output interface module connects, the radio frequency module for reading and writing can carry out radio read-write to electronic tag, by main control module data are sent to usb interface module, also computing machine also can be operated to the radio frequency module for reading and writing by USB interface transmission order simultaneously, and input/output module can be carried out password setting and information demonstration by the reading card device.

The beneficial effects of the utility model are, have adopted the mode of USB interface and computing machine to carry out communication, and being connected of more convenient and computing machine improved the versatility of equipment, has higher utility, economic worth.

Description of drawings:

Fig. 1 is a schematic diagram of the present utility model, and Fig. 2 is the utility model electricity structural drawing.

Embodiment:

As shown in Figure 1, the utility model comprises main control module 1, usb interface module 2, radio frequency module for reading and writing 3, input/output interface module 4, it is characterized in that, main control module 1 respectively with usb interface module 2, radio frequency module for reading and writing 3, input/output interface module 4 connects, radio frequency module for reading and writing 3 can carry out radio read-write to electronic tag, by main control module 1 data are sent to usb interface module 2, also computing machine also can be operated to radio frequency module for reading and writing 3 by USB interface transmission order simultaneously, and input/output module 4 can be carried out password setting and information demonstration by the reading card device.

As shown in Figure 2, employing is based on the frequency read/write design proposal of STC11F32 high-speed microprocessor and MFRC500 chip; Simultaneously, on this card reader, expanded lattice graphics lcd LCD and serial storage W25X80, and peripherals such as USB chip CH340T.The USB chip makes this card reader save serial ports and power supply side mouth.The compatible fully tradition 8051 of STC11F32 instruction code.Inner integrated highly reliable reset circuit can be used on occasions such as high-speed communication, Based Intelligent Control, strong jamming.MFRC500 is that Philips company is applied to a member in the high integrated Card Reader IC series in the 13.56MHz contactless communication.This Card Reader IC series is utilized advanced modulation notion, fully-integrated all types of passive contactless communication modes and agreement under the 13.56MHz.MFRC500 supports all layers of ISO 14443A, and inner transmitter part does not need to increase active circuit just can directly drive near operation distance antenna (distance can reach 10cm).In order to use the expansion SRAM of the inner 1KB of STC11F32, adopt the emulation bus interface mode, promptly link to each other with the P0 mouth of single-chip microcomputer and D0～D7 of MFRC500, usefulness EA, AL E, WR, RD etc. link to each other with the NCS of MFRC500, AL E, NWR, NRD etc. respectively as control line.Owing to be the emulation bus mode,, the P0 mouth of single-chip microcomputer draws resistance so will adding.CH340T usb bus connect chip can realize that USB changes serial ports, is used to computing machine expansion asynchronous serial port, perhaps common serial equipment directly is upgraded to usb bus.CH340T is a full speed USB device interface, compatible USB V2.0, and peripheral component only needs devices such as crystal and electric capacity; Hardware full duplex serial ports, built-in transmitting-receiving buffer zone; Support Modem cue RTS, DTR, DCD, RI, DSR etc. commonly used.CH340T makes this card reader save serial ports and power supply side mouth, can communicate by letter with the PC management software by this USB interface.

Claims

1. USB radio-frequency card reader, comprise main control module (1), usb interface module (2), radio frequency module for reading and writing (3), input/output interface module (4), it is characterized in that, main control module (1) respectively with usb interface module (2), radio frequency module for reading and writing (3), input/output interface module (4) connects.