資料來源:https://www.seeedstudio.com/Xadow---NFC-Tag-p-1881.html
Xadow - NFC Tag is a highly integrated Near Field Communication Tag module,this module is I2C interface,which base on M24LR64E-R,M24LR64E-R have a 64-bit unique identifier and 64 -Kbit EEPROM.Xadow - NFC Tag attach an independent PCB antenna which can easily stretch out of any enclosure you use, leaving more room for you to design the exterior of your project.
Specification
Working Voltage: 5V or 3V3
Working Current<1mA
2CM max effective range
Serve for contactless communication at 13.56MHz
ISO 15693 and ISO 18000-3 mode 1 compatible
64-bit unique identifier (UID)
Read Block & Write (32-bit blocks)
I2C Interface
Documents
Please visit our wiki page for more info about this product. It will be appreciated if you can help us improve the documents, add more demo code or tutorials. For technical support, please post your questions to ourforum.
NOTE
This module is not compatible with any other Xadow version 2 or RePhone modules.