The chips of smart rings mainly include the following:
IC chips: This type of chip has a frequency of 1356mhz。The NXP series has chips such as MIFARE 1K S50 and NTAG213 215 216, and domestic chips have compatible chips such as Fudan F08 and Feiju. In addition, there are UID and CUID chips that can erase the UID card number.
Among them, the functions of the S50 and F08 chips are similar, they can be used in scenarios such as identity recognition and security access control, while the NTAG series and Feiju compatible chips are used in scenarios such as electronic business cards, Bluetooth and WiFi sharing, and amiibo game cards.
The main function of UID and CUID is to erase and copy S50 or F08 cards, and cannot be used in NTAG series chips. Because the SAK of S50, F08, UID, and CUID is 08, and the SAK of NTAG213 215 and 216 is 00.
In addition, there are J**A chips in the IC chips, most of which are NXP's, typical chips in Tesla, BYD, Weilai, Ideal and other car key cards, and their SAKs are generally 24.
The chip for public transportation or financial payment is generally a CPU card, and the SAK is generally 28, which has the highest protection level and is the most secure.
ID chips: The frequency of this type of chip is generally 125kHz, of course, there are different offset frequencies, but they are more niche and will not be repeated. We commonly use TK4100, EM4100, T5577, EM4305 and other chips.
Among them, the TK4100 and EM4100 have written dead card numbers before leaving the factory, and they can be used as long as they are authorized on the card reader. The T5577 card may repeatedly erase the card number, which means that it can copy the TK4100 and EM4100 cards, and it can write the HID 26bit card number as a HID card, and the EM4305 functions similarly to the T5577.
In addition, 5200 and 8268 ID chips have also appeared in China, these chips are mainly used to copy TK4100 and EM4100 cards, of which 8268 can penetrate the firewall to achieve the purpose of access control.
Hotspot Engine Project Sensor chips: Some smart rings, such as Apple's Smart Ring, also include force sensors, displacement sensors, and other sensors that collect information about normal and shear forces in finger devices, as well as measure the movement of the side of the finger when it touches the outer surface. These sensors can be used with AR VR headsets to improve the interactive experience of the AR VR world.
Together, these chips form the core of the smart ring, enabling the smart ring to achieve a variety of functions and applications. Please note that the type and number of chips that different smart rings may contain will vary, depending on the design and functional needs of the ring.