La tarjeta IC es otra nueva herramienta de información después de la tarjeta magnética, que se refiere a la tarjeta de circuito integrado. La tarjeta de bus es un tipo de tarjeta IC. La tarjeta IC común utiliza tecnología RF para comunicarse con el lector de tarjetas IC.

Según su estructura, la tarjeta IC se puede dividir en tarjeta de memoria general, tarjeta de memoria encriptada, tarjeta de CPU y tarjeta súper inteligente.

1. La tarjeta de memoria , cuyo chip incorporado es equivalente a la memoria EEPROM serial ordinaria, tiene las ventajas de un almacenamiento de información conveniente, uso simple, precio bajo de la tarjeta IC y puede reemplazar la tarjeta magnética en muchas ocasiones. Sin embargo, debido a que no tiene la función de seguridad de la información, solo se puede usar en aplicaciones con requisitos de seguridad bajos.

2. La tarjeta de encriptación lógica y la tarjeta de memoria de encriptación están integradas con chips, y la lógica de control se agrega fuera del área de almacenamiento. Antes de acceder al área de almacenamiento, se debe verificar la contraseña. Solo la contraseña es correcta, se puede realizar la operación de acceso. Este tipo de información tiene buena confidencialidad.

3. La tarjeta CPU , con chip integrado en la tarjeta, es equivalente a un tipo especial de microcomputadora de un solo chip, que no solo tiene controlador, memoria, lógica de control de tiempo, sino también unidad de algoritmo y sistema operativo. Porque la tarjeta de CPU tiene las características de gran capacidad de almacenamiento, gran capacidad de procesamiento, seguridad de almacenamiento de información, etc. Es ampliamente utilizado en situaciones donde los requisitos de seguridad de la información son particularmente altos.

4. La tarjeta súper inteligente , que tiene MPU y memoria, teclado, LCD y fuente de alimentación, es rara.

La tarjeta IC se divide en tarjeta IC de contacto y tarjeta IC sin contacto de acuerdo con las diferentes interfaces de intercambio de datos con el mundo exterior.

The contact IC card can read and write data after the contact of the IC card reading and writing device contacts with the contact of the IC card. The international standard ISO7816 has strict regulations on the mechanical and electrical characteristics of such cards.

The contactless IC card has no circuit contact with the IC card equipment, but read and write through the contactless read and write technology, which successfully solves the problem of passive and contactless, and is a major breakthrough in the field of electronic devices. In addition to CPU, logic unit and memory unit, the embedded chip adds RF transceiver circuit. This kind of card is generally used in the automatic toll collection system of public transportation, ferry, subway and other occasions with frequent use, relatively less information and high reliability requirements.

At present, the most common contactless IC card in the market is contactless logic encryption card. With its good performance and high cost performance, this kind of IC card has been favored by the majority of users, and has been widely used in public transport, medical treatment, access control and other fields. Because the non-contact logic encryption card chip adopts the stream cipher technology and the key length is not very long, there are some security risks in the logic encryption card chip, which may be cracked by hackers. In the fields of finance, identity recognition, e-passport and so on, which have higher security requirements, the non-contact CPU card chips with embedded microprocessors are preferred.

In the application of contact IC card, gas recharge card is one of the most widely used schemes. To use gas recharge card, you only need to open the app and use the Bluetooth function of mobile phone and gas recharge card to complete the whole process of gas recharge. 

The working principle of contact IC card is as follows:

1. Application (APP) starts the access requirements of the card from the server.
2. The server verifies the requirements, and then downloads the one-time password to the application program (APP), and allows the application program to access the card.
3. Application program (APP) sends IC card access command with password to soc-ble single chip microcomputer.
4. The soc-ble microcontroller performs corresponding operations according to the received commands, such as reading, writing and verifying passwords.
5. Soc-ble single chip microcomputer packages and sends card data to mobile application program (APP).
6. Date of APP update service

Most of the common IC card applications on the market are contact IC cards, which are in line with the use habits of most users. Contact gas recharge cards, while maintaining the use habits of most users, make recharge more convenient, and will have long-term development. RF-star is focusing on gas recharge card application and developing a more convenient application scheme. Please contact us at info@rfstariot.com if you want to purchase samples of Bluetooth modules for your projects.