How Do RFID Cards Work?
Dec 10 , 2020

  • How Do RFID Cards Work?

1. What Is RFID Cards?

Radio frequency card, referred to as RFID card, also called non-contact IC card, which is an integrated circuit card that transmits data in a wireless manner. It has unique advantages such as data processing and security authentication functions. It successfully combines radio frequency identification technology with IC The combination of card technology solves the problem of passive and contact-free, which is a major breakthrough in the field of electronic devices. Due to the incomparable advantages of magnetic cards and contact IC cards, one of them immediately attracted widespread attention after it came out, and was promoted and applied at an astonishing speed.

2. Structure Of RFID Card:

The 8K-bit EEPROM of the radio frequency card (RFID card)is divided into 16 sectors, each sector is composed of four blocks, and each block consists of 16 bytes. Block three (fourth block) of the four blocks of each sector contains the KEYA (6 bytes), access control (4 bytes) and KEYB (6 bytes) of the sector, and the remaining three blocks. data block. Among blocks 0 to 63, block 0 is a solidified block with special contents such as manufacturer code. It is widely used in the fields of identity authentication, credit authentication, automatic control, security protection, etc. Its security, confidentiality, and practicability are unmatched by various general protection circuits at present.

3. Principle Of RFID Card:
Simply speaking that is information. RFID cards basic working principle is not complicated. After the RFID tag enters the magnetic field, it receives the radio frequency signal from the reader, and uses the energy obtained by the induced current to send the product information stored in the chip, or the RFID label tag actively sends a signal of a certain frequency. After the reader reads and decodes the information, it is sent to the central information system for relevant data processing.

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