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NXP NTAG I²C Technical Product Presentation

Brand: NXP

Introduction to NFC and NXP's Portfolio

This document introduces Near Field Communication (NFC) technology and NXP's comprehensive range of NFC tags. It outlines the NFC Forum Tag platforms, including Type 1, 2, 3, and 4 tags, and highlights compatible NXP products such as MIFARE Classic, ICODE, and various NTAG series.

NTAG I²C: Dual Interface NFC Tag

The NTAG I²C is presented as a versatile NFC Forum Type 2 Tag compliant device featuring a dual interface. It supports both standard NFC communication (RF) and a serial I²C interface, enabling seamless integration with microcontrollers. Key specifications include a 50 pF input capacitance and options for 888 or 1904 bytes of user memory.

Key Features of NTAG I²C

Dual Interface: Combines NFC (RF) and I²C for flexible connectivity.
Embedded SRAM: 64 bytes of SRAM for high-speed data transfer or mirroring.
Field Detection: Configurable Field Detection (FD) pin for event triggering and system wake-up.
Energy Harvesting: Capability to power external components or the I²C interface from the RF field.
Pass-Through Mode: Enables direct data exchange between NFC devices and connected microcontrollers.
Memory Arbitration: Manages simultaneous access requests from RF and I²C interfaces to prevent conflicts.

Interfaces and Memory Structure

The presentation details the RF interface commands (e.g., READ, WRITE, GET_VERSION) and the I²C interface for accessing memory blocks and session registers. It elaborates on the memory organization, including user memory, SRAM, configuration bytes, session registers, and access rights, along with static and dynamic lock bits for security.

Product Support and Resources

NXP provides extensive support for the NTAG I²C, including PC software like NFC Discover and Android applications such as NFC TagInfo and NTAG I²C Demoboard. Hardware evaluation boards and demo kits are also available to facilitate development and testing.

Applications

The NTAG I²C is suitable for various applications, including home automation, smart metering, consumer electronics (e.g., media streaming, device configuration), and healthcare (e.g., vital measurements). Its dual interface and advanced features allow for rich interaction between NFC-enabled devices and embedded systems.

Known Software Issues

The document also addresses potential software issues and compatibility considerations with NFC devices, such as memory initialization effects on lock functions and timeouts for sector select commands, providing guidance for developers.

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NTAG I2C FUNCTION Microsoft PowerPoint 2010 Michael Salfer

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