ST ST25DV动态NFC RFID标签双接口解决方案

ST公司的ST25DVxxx是动态NFC/RFID标签集成电路,提供4KB,16KB和64KB电可擦除可编存储器(EEPROM),提供I2C串口(支持1MHz,单电源1.8V-5.5V)和RF无接触接口(基于ISO/IEC 15693和NFC Forum Type 5 tag,支持所有的ISO/IEC 15693调制,编码,副载波模式和数据速率).主要用于工业应用如智能表,IoT设备,专业或消费类电子产品.本文介绍了ST25DVxxx主要特性,框图和两种工作模式,以及演示板ST25DV-DISCOVERY包括主板MB1283和子板MB1284主要特性和电路图.

The ST25DVxxx device is a NFC RFID Tag offering 4 Kbit, 16 Kbit, and 64 Kbit of electrically erasable programmable memory (EEPROM). ST25DVxxx offers two interfaces. The first one is an I2C serial link and can be operated from a DC power supply. The second one is a RF link activated when ST25DVxxx acts as a contactless memory powered by the received carrier electromagnetic wave.

In I2C mode, the ST25DVxxx user memory contains up to 8192 bytes, which could be split in 4 flexible and protectable areas.

In RF mode, following ISO/IEC 15693 or NFC forum type 5 recommendations, ST25DVxxx user memory contains up to 2048 blocks of 4 bytes which could be split in 4 flexible and protectable areas.

ST25DVxxx offers a fast transfer mode between the RF and contact worlds, thanks to a 256 bytes volatile buffer (also called Mailbox).

In addition, the GPO pin of the ST25DVxxx provides data informing the contact world about incoming events, like RF field detection, RF activity in progress or mailbox message availability.

An energy harvesting feature is also proposed when external conditions make it possible.

ST25DVxxx主要特性:

I2C interface

• Two-wire I2C serial interface supports 1MHz protocol

• Single supply voltage: 1.8V to 5.5V

• Multiple byte write programing (up to 256 bytes)

Contactless interface

• Based on ISO/IEC 15693 and NFC Forum Type 5 tag

• Supports all ISO/IEC 15693 modulations, coding, sub...