For the purposes of this document, TRF79xxA refers to the following devices unless otherwise specified: TRF7970A and TRF7964A
This guide contains a compilation of frequently asked questions concerning the TRF79xxA series of devices. It serves as a central resource for evaluating or designing with the TRF79xxA devices. This guide includes links to recommended evaluation modules, TI Designs, firmware examples, and other collateral that is relevant for the TRF79xxA family.
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The TRF7970A and TRF7964A are high-performance 13.56-MHz analog front end (AFE) ICs for Near Field Communication (NFC) and RFID reader/writer applications with integrated data-framing system for ISO/IEC 15693, ISO/IEC 18000-3, ISO/IEC 14443A/B, and FeliCa. The TRF7970A supports all three NFC operating modes (reader/writer, peer-to-peer and card emulation), whereas the pin-to-pin and firmware compatible TRF7964A supports only the reader/writer mode. The devices have integrated encode, decode, and data framing capability for data rates up to 848 kbps, wide supply voltage range support (2.7 V to 5.5 V), large FIFO buffer for RF communication, and an innovative RF field detector. Relevant NFC or RFID software stack libraries are offered to allow for easy development efforts and robust cost-effective designs. Eight selectable power modes and ultra-low-power operation enable long battery life applications. The devices also offer unparalleled flexibility through the various direct communication modes on the device, which allow implementations of custom and proprietary protocols as well as other 13.56-MHz standards. The receiver system enables AM and PM demodulation using a dual-input architecture to maximize communication robustness.
For this section, TRF79xxA includes the TRF7960A, TRF7962A, TRF7963A, TRF7964A, and TRF7970A.
Each TRF79xxA device includes integrated protocol handling for certain ISO/IEC or NFC Forum standards. Table 1 lists the protocols supported by all TRF79xxA devices in the TI portfolio.
Standard | TRF7960A, TRF7964A | TRF7962A | TRF7963A | TRF7970A |
---|---|---|---|---|
ISO standards | ISO/IEC 14443A | ISO/IEC 15693 | ISO/IEC 14443A | ISO/IEC 14443A |
ISO/IEC 14443B | ISO/IEC 18000-3 | ISO/IEC 14443B | ISO/IEC 14443B | |
FeliCa (JIS X 6319-4) | FeliCa (JIS X 6319-4) | FeliCa (JIS X 6319-4) | ||
ISO/IEC 15693 | ISO/IEC 15693 | |||
ISO/IEC 18000-3 | ISO/IEC 18000-3 | |||
ISO/IEC 18092 | ||||
ISO/IEC 21481 | ||||
NFC Forum reader/writer standards | Type 2 | Type 5 | Type 2 | Type 2 |
Type 3 | Type 3 | Type 3 | ||
Type 4A | Type 4A | Type 4A | ||
Type 4B | Type 4B | Type 4B | ||
Type 5 | Type 5 | |||
NFC Forum peer-to-peer standards | N/A | N/A | N/A | Type A (initiator and target) |
Type F (initiator and target) | ||||
NFC Forum card emulation standards | N/A | N/A | N/A | Type 4A |
Type 4B |
It is possible to communicate with unsupported NFC/RFID tags and devices by operating the TRF79xxA in Direct Mode 0, which requires the host MCU to run at a multiple of 13.56 MHz to encode and decode the raw subcarrier signal. This allows the raw data to be received by the host MCU, which must process the received data including handling all packet and byte framing, parity checks, and CRC calculations.