With these advanced features and a function that can correspond to a variety of applications at the same time, felica is an ideal product suitable for a variety of applications in the network and real society.

Felica is a contactless smart card technology developed by Sony. As the name "felicity" shows, the birth of this technology makes people's daily life more convenient and comfortable.

The smart card manufactured by felica technology is difficult to crack or forge, and its technology can ensure the security of data in the process of high-speed receiving and sending. Its environmental protection is reflected in the fact that data can be rewritten almost infinitely. At the same time, its extremely convenient use saves people a lot of inconvenience in use.

Chip manufacturer:Sony

Response frequency:13.56MHz

Read / write life:Infinite times

Read / write distance:10cm

Product type:Iso14443 85.5*54*0.84mm non-standard special-shaped card

Packaging material:PVC ABS PET PETG

Application scope:Community access control, personnel management, mobile tag, mobile payment, e-wallet, etc

Technical parameters:Felica is a radio frequency identification technology developed by Sony. The carrier frequency used in this technology is the same as that of iso14443a and ISO14443B, both of which are 13.56MHz. Therefore, some people call it iso14443c, but Sony has not officially accepted such a title. Felica technology is not a completely public protocol, especially the part of the technology involving security authentication and encryption. Sony's confidentiality is very good. This article introduces only part of its public information. The communication protocol of felica technology includes three layers: the physical layer describes the physical and electrical characteristics of data transmission; The data link layer describes the format of data transmission and error detection; The application layer describes the functions and specifications of commands

The physical characteristics of felica RF transmission are shown in the table below

Physical characteristics of felica RF interface

Data packets are used for data transmission between felica cards and readers.

The format of the data package is as follows:

Data packets are used for data transmission between felica cards and readers.

The command package of felica technology application layer consists of command code and command data, including 1-byte command code and n-byte command data. The command code identifies the type of command, and the command data is the data required for the execution of this command. After the card reader command is issued, the card replies with a response package, which is composed of 1-byte response code and n-byte response data. The response code identifies the type of response, and the response data is the data returned by the card after this command is executed.

Felica commands are listed below:

Felica has two important parameters: factory identification number (IDM) and factory parameters (PMM). IDM and PMM can be obtained by using the polling command. IDM and PMM are solidified in the card when leaving the factory, and the card cannot be modified after leaving the factory. Felica uses the factory identification number (IDM) to identify a card in communication. IDM includes two parts: manufacturer code and card identification code. Factory parameters (PMM) include 2-byte chip type (used to identify products) and 6-byte maximum response time parameter (used to determine the timeout of each command). Felica adopts the method based on time slot to realize the anti-collision mechanism of cards. In order to identify a card, the reader writer must poll an unknown number of cards using the polling command. After receiving the polling command, the card selects a time slot in a random manner and responds when the reader / writer calls the time slot, so as to achieve conflict prevention. When the reader / writer correctly receives the response of a card to the polling command, the reader / writer can obtain the IDM of the card. In subsequent communication, the reader / writer can specify a unique card from multiple cards in the RF field by including the IDM in the command package. After receiving the command, the card will compare its IDM with the IDM in the command package. If it is different, the card will not respond to the command. This mechanism realizes the card selection in the RF field.