Different applications in RFID and NFC, RFIDs have a lot of similarities, in addition to application and use frequency bands, they also share many industry standards, two of which are more common standard protocols, to show everyone RF development board from STM If you don't understand and doubt it if you have a procedure of the purchase or a development board model.
RFID:
Many people are from a IBM advertisement for RFID: A youth of the supermarket shopping, go to the windbreaker in the windbreaker, directly to the billing table, and do not need to pay. This advertisements show people the application of RFID technology in daily life.
RFID (RADIO FREQUENCY IDENTIFICATION) is an automatic identification technology that communicates with radio waves. The basic principle is to communicate data communication through an electromagnetic coupling or inductive coupling between the reading head and the label adhesive on the object to achieve automatic identification of the label item. Automatic identification means that a certain identification device is applied, and the related information of the identified item is automatically acquired by the receiving activity between the identified item and the identification device, and provides a technique for completing the relevant subsequent processing.
The main frequency bands of RFID are: 125kHz, 134.2kHz, 13.56MHz, 860-960 MHz, 2.45GHz and 5.8 GHz. Different working distances have different working distances, and there are differences in the application field. The RFID system of the low frequency band (LF, 125kHz, 134.2KHz) is mainly used for animal identification, factory data acquisition, etc .; RFID system technology in high frequency (HF, 13.56MHz) is more mature, widely used in access control, intelligent transportation, etc. The LF and HF band use inductive coupling mode, general working distance; UHV (UHF, 860-960 MHz) RFID system electronic tag effective working distance can reach 3-6 meters, suitable for logistics, supply chain and other fields . The microwave band (2.45GHz and 5.8GHz) is applied to container management and highway charges, UHF and microwave bands are used to apply electromagnetic coupling mode, and the working distance is far.
NFC:
NFC is Near Field Communication abbreviation, i.e., close-up wireless communication technology. NFC developed by Philips and Sony is a non-contact identification and interconnection technology that can be processed at close wireless communication between mobile devices, consumer electronics, PCs, and intelligent control tools. NFC provides a simple, touch-style solution that allows consumers to exchange information, access content and services simple and intuitive. Currently, the NFC Forum has more than 70 members worldwide, including: MasterCard International Organization, Matsushita Electronic Industry Co., Ltd., Microsoft, Motorola, NEC, Renesas Technology, Samsung, Texas Instrument Manufacturing Company and VISA International Organization . NFC is developed on the basis of RFID, NFC does not differ much from Essentially RFID, both of which are transmitted between two objects that are similar.
ISO / IEC 15963
ISO15693 is an international standard for RF identification applications, which defines air interfaces and data communication specifications working at 13.56MHz, and the data communication specification that meets this standard, which is 2 meters. The minimum of the workplace is 0.15A / m, the maximum 5A / m. The reader-writer to the label encoding method uses pulse position modulation, supports two coding methods, 256 selected 1 mode and 4 selected 1 mode. The communication rate is 1.54kbit / s when a 256 selected 1 mode is 26.48kbits / s when 4 selected 1 mode is 26.48kbits / s. The data encoding of the label to the reader uses the Manchester coding method, depending on the signal debugging, the communication rate is different, as shown in the following table, the label supports both high speed and low-speed communication speed:
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ISO / IEC 15963 application
1) personnel channel
The person channel is the most representative product of ISO15693 standard, and the product typically supports 1 dimensional or two-dimensional tag identification. Typical label read and write distance is 120cm or more. It is widely used in personal identification, conference sign in, library management, access control , Item tracking, item security, warehousing logistics and other fields.
2) Over-directional channel
Support for the three-dimensional direction of the label, the channel spacing can reach more than 90cm, support EAS, AFI detection mode, support offline applications and multi-antenna side by side, automatic statistics and display personnel. Mainly used in book burglary, identification, conference sign in, access control, item tracking and other fields
3) Smart Bookshelf
Smart bookshelf is a high-performance in the frame book real-time management system, using RFID technology to realize the identification of books and book items, and can complete the collection of library monitoring, checkpoints, book query positioning, mismatch statistics. The smart bookshelf system has the characteristics of fast detection speed and accuracy. Can be applied to books, files, document management and other fields.
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ISO / IEC14443
ISO14443 is an RFID international standard adapting to the near field communication. The maximum reading distance he supports is 10cm, and ISO14443 standard defines air interfaces and data communication specifications working at 13.56MHz.
ISO14443 specifies data transmission mode between two readers and near-coupled IC cards: Types and B Type A and Type B, the minimum data communication rate supported by 106kbps, up to 848kbps.
Type A is first developed and used by semiconductor companies such as Philips (NXP). It is currently the most widely used protocol standard in the international application. From PCD to PICC, ASK 100% modulation debugging method, from PICC to PCD using OOK subcarriers Debug mode.
TYPE B is an open non-contact smart card standard that uses the PCD to PICC ASK 10% amplitude debugging mode, from PICC to PCD using BPSK subcarrier debugging mode.
ISO14443 application occasion
The ISO14443 standard is mainly used in the field of person management and small payment of close security identification. The main application areas, one cartoon, member management, personnel attendance, shopping card, identification, electronic document, etc.
Development kit display
The M24LR kit is an IC version based on the EEPROM of M24LR04E-R, with a dual interface, and can be used in a wide range of applications, such as industrial or medical devices and consumer electronics, and the kits include two functional development boards.
Features:
1) The M24LR development board includes the M24LR04 EEEPROM I2C chip, and includes a dual interface of RMN6T / 2 and an RF interface complies with ISO / IEC15693 standard RF interface, 4 Kbit's EEPROM, and a 68-bit microcontroller SO8N kit with password protection STM8L152C6T, This includes 8 kb STTS7510WB3F flash, low voltage digital temperature sensor, 20x40 mm induction antenna, and two function buttons are welded to the PCB board (using the keys and reset keys, respectively).
2) RF receiving board CR95HF-VMD5T contains a 13.56 MHz multi-protocol non-contact transmission and receiving IC chip, connecting STM32F103CB 32-bit microcontrollers SPI and UART serial data interface, 128 bytes of flash, 47x 34mm 13.56 MHz Induction antennas, and the USB connection port of the associated circuit, can communicate with the PC host, and power supply to the development board.
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