1.1 Features 1
• Pass-Through Operation Sends Data Updates and
Requests to Host Controller
• I2C Interface Allows Writing and Reading of
Internal SRAM
• Prefetching, Caching, and Auto ACK Features
Increase Data Throughput
• Enables Data Streaming
• All RF Communication up to Layer 4 Handled
Automatically
• Supports up to Maximum NDEF Message Size
• Compliant With ISO/IEC 14443B
• Supports up to 848 kbps

1.2 Applications
• Wireless Firmware Updates
• Wi-Fi® and Bluetooth® Pairing
• Service Interface
• Wireless Sensor Interfaces

1.3 Description
The TI Dynamic NFC/RFID Interface Transponder RF430CL331H is an NFC Tag Type 4 device that
combines a contactless NFC/RFID interface and a wired I2C interface to connect the device to a host. The
NDEF message can be written and read from the integrated I2C serial communication interface and can
also be accessed and updated over a contactless interface using the integrated ISO/IEC 14443 Type B
compliant RF interface that supports up to 848 kbps.
The device requests responses to NFC Type 4 commands on demand from the host controller and stores
only a portion of the NDEF message in its buffer at any one time. This allows NDEF message size to be
limited only by the memory capacity of the host controller and specification limitations.
Support of read caching, prefetching, and write automatic acknowledgment features allows for greater
data throughput.
This device enables NFC connection handover for an alternative carrier like Bluetooth®, Bluetooth® low
energy (BLE), or Wi-Fi as an easy and intuitive pairing process or authentication process with only a tap.
As a general NFC interface, the RF430CL331H enables end equipment to communicate with the fastgrowing
infrastructure of NFC-enabled smart phones, tablets, and notebooks.