M1 mass attendance card, M1 bus card, S70 smart card

Basic introduction www.copnn.comIC card (Integrated Circuit Card, IC card), some countries and regions, also known as a smart card (smart card), smart cards (intelligent card), a microcircuit card (microcircuit card) or microchip cards. It is a micro chip embedded in the card base in line with ISO 7816 standards in the form of a card made. IC card reader is a bridge between IC card and application system, known as the interface device IFD (Interface Device) in the ISO international standard. IFD within the CPU via an interface circuit with the IC card is connected and communicate. IC card interface circuit IC card reader is a vital part of the system depending on the application, choose parallel communication, half-duplex serial communication, and I2C communication, such as different IC card reader chip. Non-contact IC card, also known as radio frequency card. The main features of IC card shortcoming disadvantage is the high manufacturing cost. Advantages IC card and magnetic card similar appearance, it is the difference between magnetic data storage media is different. Card is used to store information by magnetic field changes the magnetic stripe on the card, and IC card is embedded in the card by electrical erasable programmable read-only memory integrated circuit chip (EEPROM) for storing data information. Therefore, compared with the magnetic card, IC card has the following advantages: ① large storage capacity. Magnetic storage capacity of about 200 characters; IC card memory capacity depending on the model, hundreds of small characters, great characters millions. ② good security and confidentiality. Information on the IC card can be freely read, modify, erase, but they require a password. ③CPU card has a data processing capability. In the exchange of data with the reader, the data can be encrypted, decrypted, in order to ensure accurate and reliable exchange of data; and a magnetic card does not have this feature. ④ long service life.