NFC as wireless EEPROM memory

[David.Cheng]

HELLO ALL! i want to do point to point (P2P) data exchange between the NFC and a smart phone,

Im new to NFC, require 64Kbyte EEPROM and mcu can write it, how to choose the chip

[Brian TIDAL]

Hi,

if my understanding is correct, you would like something like this:

MCU <---Local Interface---> Tag <--- RF interface ---> Smartphone

i.e. a tag with an NFC interface (communication with a smartphone) and with a local interface for communication with an MCU

In such case, you can use the following products

• ST25DV64K if you want ISO/IEC 15693 products (Long Range) supporting a Fast Transfer Mode through a Half-duplex 256-byte dedicated buffer
• M24LR64E-R if you want ISO/IEC 15693 products (Long Range)
• M24SR64-Y if you want ISO/IEC 14443 products (Short Range)

Those products can be operated from an I2C interface or by a 13.56 MHz RFID reader or an NFC phone. The I2C interface uses a two-wire serial interface, consisting of a bidirectional data line and a clock line. It behaves as a slave in the I2C protocol.

See ST25 Dynamic NFC tags product selector web page on st.com.

Rgds

BT

[David.Cheng]

the idea is that mcu writes data to nfc, phone reads the data via NFC

[Brian TIDAL]

Hi,

See our various demos with dynamic tags:

Getting Started NFC: ST25DV discovery kit smartphone demo

Getting Started NFC: ST25DV discovery kit demonstration using ST25R3911B reader

if you want to prototype an application based on dynamics tags, you can use the following Discovery kits:

• ST25DV-DISCOVERY Discovery kit for ST25DV04 Dynamic NFC/RFID tag IC with fast transfer mode capability
• M24LR-DISCOVERY Discovery kit for CR95HF Reader & M24LR04E Dynamic NFC / RFID Tags with energy harvesting
• M24SR-DISCOVERY Discovery kit for the M24SR series - Dynamic NFC/RFID tag

Rgds

BT

[David.Cheng]

thx, can dynamic tags store more than 64KB data?

[Brian TIDAL]

Hi,

​Current products can store up to 64Kbits (8 Kbytes)

Rgds

BT

#[ST25 NFC/RFID Tags and Readers]​