TI公司的TRF7970A是用于13.56MHz RFID/NFC近場通信系統的模擬前端和數據幀器件,可工作于三種模式之一:RFID/NFC閱讀器,NFC對等和模擬卡片模式.器件工作電壓2.7 -5.5 VDC,支持NFC標準NFCIP-1 (ISO/IEC 18092)和NFCIP-2 (ISO/IEC 21481),完全集成了ISO15693, ISO15693, ISO18000-3, ISO14443A/B, FeliCa協議處理,內置的用戶可配置編程選擇使TRF7970A適合于廣泛的應用如移動設備(平板電腦,手機等),安全配對(藍牙, WiFi等),護照或POS讀系統,短程無線通信任務,產品辯認或鑒定,醫療設備,接入控制,數字門鎖,電子交易卡共享等.本文介紹了TRF7970A主要特性,方框圖, 應用框圖和應用電路,以及TRF7970A EVM評估模塊主要特性, 應用框圖和嵌入系統框圖.

The TRF7970A is an integrated analog front end and data-framing device for a 13.56-MHz RFID/Near Field Communication system. Built-in programming options make it suitable for a wide range of applications for proximity and vicinity identification systems.

It can perform in one of three modes: RFID/NFC Reader, NFC Peer, or in Card Emulation mode. Built-in user-configurable programming options make it suitable for a wide range of applications.

The TRF7970A is configured by selecting the desired protocol in the control registers. Direct access to all control registers allows fine tuning of various reader parameters as needed.

TRF7970A主要特性:

TRF7970A應用:

• Mobile Devices (Tablets, Handsets, etc.)

• Secure Pairing (Bluetooth, WiFi, Other Paired Wireless Networks)

• Public Transport or Event Ticketing

• Passport or Payment (POS) Reader Systems

• Short Range Wireless Communication Tasks (Firmware Updates)

• Product Identification or Authentication

• Medical Equipment or Consumables

• Access Control, Digital Door Locks

• Sharing of Electronic Business Cards

圖1. TRF7970A 方框圖

圖2. TRF7970A應用框圖

圖3. TRF7970A應用電路圖:并行MCU接口

圖4. TRF7970A應用電路圖:帶SS模式MCU接口的SPI

TRF7970A評估模塊(EVM)

The TRF7970A EVM is a self contained development platform which can be used to independently evaluate/test the performance of the TRF7970A RFID/Near Field Communications (NFC) Transceiver IC, custom firmware, customer designed antennas and/or potential transponders for a customer defined RFID/NFC application.

TRF7970A EVM主要特性:

NFC Modes (RFID ReaderWriter, Peer to Peer and Card Emulation)

ISO15693 standard based transponders

ISO14443 standard based transponders (Types A&B)

FeliCa based transponders (UID read only)

Standalone Polling Mode for quick demonstration of transponder detection

Communication with Host Software Graphical User Interface (GUI) via USB VCP

The TRF7970A EVM also has the following hardware features specifically for development purposes:

MSP430F2370 Ultra-Low Power microcontroller with JTAG connectivity to development environment for custom firmware development.

Parallel or SPI connectivity via zero ohm jumpers Logic Analyzer/Oscilloscope test points for relevant signal observation during code development SMA (edge mount and through-hole) pads for connecting customer designed antenna.

The TRF7970A EVM features include:

• Support for:

– ISO15693 standard based transponders

– ISO14443 standard based transponders (Types A and B)

– NFC Forum modes (RFID readerwriter, peer to peer, and card emulation)

• FeliCa™ based transponders (UID read only)

• Standalone polling mode for quick demonstration of transponder detection

• Communication with host software graphical user interface (GUI) via USB VCP

The TRF7970A EVM also has the following hardware features specifically for
development purposes:

• MSP430F2370 ultra-low power microcontroller with JTAG connectivity to development environment for custom firmware development.

• Parallel or SPI connectivity via 0-Ω jumpers

• Logic analyzer/oscilloscope test points for relevant signal observation during code development

• SMA (edge mount and through-hole) pads for connecting customer designed magnetic dipole circuit

圖5. TRF7970A EVM評估模塊應用框圖

圖6. TRF7970A 嵌入系統框圖

圖7. TRF7970A EVM評估模塊外形圖
詳情請見:
http://www.ti.com/lit/ds/slos743/slos743.pdf
和
http://www.ti.com/lit/ug/slou321/slou321.pdf