One of the key elements of near field communication technology is the ability of NFC devices to communicate with passive NFC tags. This feature of NFC technology is the key to many applications.
NFC tags are being mass produced and deployed in several areas around the world. With more than a million tags deployed, NFC tags will infiltrate into many new areas as the technology becomes more popular.
It is predicted that a large number of tags will be used in the future, and the definition of the tags must be clear to ensure that the tags of different manufacturers are compatible with the devices.
NFC tag base
The NFC tag is a passive device that can be used to communicate with an active NFC device (active NFC reader). Tags can be used within applications, such as posters, and other applications where small amounts of data are stored and transmitted to an active NFC device. In the poster, the active part can be used as the contact point for the active device.
The data stored in the NFC tag can be in any form, but is typically used to store a URL (URL) for the NFC device to find further information. The amount of data required is small, so NFC tags can be used.
To define communication between active NFC readers and passive tags, the NFC Forum introduced its first standard technology architecture and NFC compliance device standards in June 2006, including: NFC Data Interchange Format (NDEF), Three Record Type Definitions (RTDs) for smart posters, text, and Internet resource reading applications.
NFC tag type definition
There are four basic tag types defined, identified by 1 to 4, each with a different format and capacity. The basis for these label type formats is: ISO 14443 A and B types, Sony FeliCa, the former is the international standard for contactless smart cards, while the latter conforms to the ISO 18092 passive communication mode standard.
The advantage of keeping the NFC tag as simple as possible is that in many cases the tag can be used once, for example in a poster with a short life span.
The various labels are defined as follows:
Tag 1 Type: This type is based on the ISO 14443A standard. Such tags have the ability to be read and rewritten, and users can configure them to be read-only. The storage capacity is 96 bytes, which is used to store URL URLs or other small amounts of data. However, the memory can be expanded to 2k bytes. The communication speed of such NFC tags is 106 kbit/s. These tags are simple and therefore cost effective and suitable for many NFC applications.
Tag 2 Type: These tags are also based on ISO14443A and are readable and re-writable, which users can configure as read-only. Its basic memory size is 48 bytes, but can be expanded to 2k bytes. The communication speed is also 106 kbit/s.
Tag 3 Type: These tags are based on the Sony FeliCa system. Currently has a memory capacity of 2k bytes and a data communication speed of 212 kbit/s. Therefore, such tags are more suitable for more complex applications, albeit at a higher cost.
Tag 4 Type: These tags are defined to be compatible with the ISO 14443A, B standard. The manufacturing time is preset to be readable/rewritable or read-only. The memory capacity is up to 32k bytes and the communication speed is between 106 kbit/s and 424 kbit/s.
It can be seen from the definitions of the above different tag types that the first two classes and the latter two classes are very different in terms of memory capacity and composition. Therefore, their application is unlikely to have a lot of overlap.
Type 1 and Type 2 tags are binary and can be read/write or read only. Classes 3 and 4 are read-only, data is written at production or written by a special tag writer.
NFC tag operation
NFC tags are passive devices that do not require a power source. When in use, the user is in contact with the NFC-enabled device. The tag gets a small power-driven tag from the reader and transfers a small amount of information to the reader.
The data in the tag memory is transferred to the NFC-enabled device. Although the amount of data is small, it may be to direct the device to a URL (URL), or a small amount of text, other data.
NFC label design and manufacturing
Label design and manufacturing need to consider many aspects. Labels are manufactured for a large number of very low cost while maintaining performance. Here are a few key performance parameters and elements to consider when designing labels:
Read speed: Speed ​​is important because all the data contained in the tag needs to be transmitted when the two NFC devices are approaching. If the data transmitted by the tag is slow, there is a danger that it cannot be completely transmitted and the reliability is poor. The result affects the user, users who do not understand the technology, if they have to repeat multiple times to be effective, they will lose confidence. The first type of NFC tag allows all data to be transmitted in blocks, maintaining the read performance of the tag.
Wafer Size: In the label design, the die size is of particular importance. Smaller sizes result in lower costs and less conspicuous labels (more important for use in posters). Smaller memory naturally leads to smaller wafer sizes.
Unit price: Given that the target application of NFC tags is extremely low cost (eg for smart posters), unit price is a very important factor in label design. Here, cost is the key. The cost of a tag is affected by a number of factors, including the size of the memory and the complexity of the integrated circuit that is associated with the additional features. By simplifying memory and features as much as possible, the cost can be reduced.
When the NFC system really takes off, label production can reach billions of scales; it needs to be carefully designed to strike the right balance between cost and performance.
LED Lighting Cable:Form: socket, plug stamping injection molding, widely used for LED outdoor lighting waterproof plug, connector, power cord plug.
Product advantages: at present, LED outdoor waterproof male and female plug, waterproofing, waterproof power line, waterproof connection line, waterproof plug wire and so on have been widely used in society, mainly waterproof male and female plug, waterproofing, waterproof power line, waterproof plug wire, these products play the advantage of environmental protection and energy saving, and can play an anti ultraviolet, radiation protection, anti-oxidation, anti-aging in hot summer. Function, in the cold winter to play a moisture-proof, moisture-proof, cold-resistant effect, so at present this product has been through the national policy and has been strongly supported by the national policy.
Main markets: LED lighting industry, outdoor lighting industry, urban lighting engineering industry, driving power industry
LED Lighting Cable
ShenZhen Antenk Electronics Co,Ltd , https://www.antenksocket.com