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Introduction of MI radio frequency card and its working principle

Update time:2022-12-07 09:43:53 / Views:28

MI radio frequency card, also known as contactless IC card, was born in the early 1990s of the 20th century, is a new technology developed in the world in recent years. It successfully uses the radio frequency identification technology and IC combined card technology, solves the passive (no power in the card) and contact-free problem, is a major breakthrough in the field of electronic equipment.

Introduction of MI radio frequency card and its working principle

Introduction of MI radio frequency card and its working principle


The radio frequency recognition namely RFID (RadioFrequencyIDentification) the technology, also called the electronic label and the wireless radio frequency recognition, is one kind does not need the recognition system and the specific target between the establishment mechanical or the optical contact the communication technology. Because the radio frequency card has the magnetic card and the contact IC card piece unparalleled advantage, once the introduction, immediately arouses the widespread attention, promotes the application with the amazing speed.


MI RF card structure.


The 8K-bit EEPROM of MI RF card is divided into 16 fan areas, each fan area consists of 4 blocks, and each fan area consists of 16 bytes. Three of the four blocks of each fan area (the fourth block) contain the fan area KEYA (6 bytes) KEYB (6 bytes), and the remaining three bit data blocks. 0-63 blocks, 0 blocks are curing blocks, including special contents such as manufacturer code.


The working principle of MI RF card.


The electrical part of MI RF card has only one antenna and ASIC no other external devices. Antenna: The antenna of the card has only a few groups of winding, which is very suitable for packing in ISO card. ASIC: The ASIC of the card is composed of high-speed (106) KB baud rate) interface, control unit and 8K bit EEPBOM.


The working principle of Ml RF card is:The reader has a set of fixed frequency electromagnetic wave LC to Ml card under the excitation of electromagnetic wave, the frequency of series resonant circuit is the same as the reader, LC resonant circuit produces resonance, so that there is charge in the capacitor. In the other end of the capacitor, connect a single conductive electronic pump, the charge in the capacitor to another capacitor storage. When the accumulated charge reaches 2 when V, this capacitor can be used as a power supply to provide working voltage for other circuits, transmitting data in the card or receiving read-write data.


MI radio frequency card confidentiality.


MI radio frequency card has good confidentiality performance: three times confirmation before reading and writing, unique card serial number, transmission data encryption, transmission password and access password protection. Only the user who knows the password can change the password in the card. Each area of EEPROM in the card has its own password, and users can set different passwords according to different areas.KEYA and KEYB two different groups of passwords, two groups of passwords to limit the minus operation and additional operation respectively. Related products link: induction ic card cpu card induction reader


Card Cube is a professional smart card manufacturer in China, the company's main products are contact IC cards, inductive IC cards, visual cards, CPU cards, ID cards, NFC various smart cards with a daily output of more than 400,000 pieces, such as business cards and smart card readers and writers. Now we are developing JHIC-U inductive IC card reader according to customers' requirements, its plug-and-play, development-free and driver-free features have been welcomed by many customers.


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