ST25DV16K - RFID tag with EEPROM 16kb non-volatile I2C memory STEMMA QT/Qwiic - Adafruit 4701

RFIDtag with16 kb EEPROMmemory from Adafruit withSTEMMA QT / Qwiicconnector. It works with mobile phones and thanks to the I2C interfaceit canbe reprogrammed to your own needs. The chip conforms toISO / IEC 15693(13.56 MHz) standards and is read by telephones and tablets. When connected to the controller, dynamic data recording begins.

Product compatible with Metro modules

The manufacturer has prepared auser guide anda library with asample program forMetro module users.

Unlikestandard RFID tags, the presentedproduct supports ISO15693 and reads ST25DV. Thanks to that it is possible to read information using AppleandAndroidphones. According to technical documentation, the module can be used as acommunication system "I2C - RFID". Thanks to it, you can wirelessly send and receive data from your mobile phone. For this purpose, you need to write your own application (using the producttechnical documentation).

RFID tag with EEPROM memory.

The module has a built-inSTEMMA QT / QWIICconnector to connect the board. The black colour indicates the GND ground of the circuit, red indicates the VIN power supply (5 V), and blue and yellow indicate the I2C connections respectively: SDA - data line, SCL - clock line.

For more information on how to connect and output the module, seethe user guide.

• I2C interface
  • Serial I2C interface with 1 MHz clock frequency
  • Use of multiple I2C addresses0x2D, 0x53(user memory)and 0x57(system memory)
  • Supply voltage: 1.8 V to 5.5 V
  • Multi-byte programming (up to 256 bytes)
• Non-contact interface
  • Based on ISO / IEC 15693
  • Type 5 NFC Forum Type 5 tag with NFC Forum certificate
  • Support for all ISO / IEC 15693 modulations
  • Fast read access up to 53 Kb/s
  • Reading single and multiple blocks (also for extended commands)
  • Save single and multiple blocks (up to 4) (same for extended commands)
  • Internal tuning capacity: 28.5 pF
• Memory
  • 16 kb EEPROM memory
  • I2C interface with byte access
  • RF interface with access to 4 byte blocks
  • Write time
    • With I2C: typically 5 ms/byte
    • With RF: typically 5 ms/block
• Quick transfer mode
  • Fast data transfer between I2C and RF interfaces
  • 256-byte dedicated half-duplex buffer
• Power supply: analogue output to supply external components

• Data protection

  • User memory: 1 to 4 configurable areas, read and/or write protected with three 64-bit RF passwords and one 64-bit I2C password
  • System configuration: protected against 64-bit RF and 64-bit I2C passwords
• Dimensions: 31.7x 25.3 x 4.6 mm

• The manufacturer's website: Adafruit 4701
• User guide
• Library for the Arduino IDE environment