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  • TRF7970A 多协议全集成式 13.56MHz RFID 和近场通信 (NFC) 收发器 IC

    • ZHCS363L August   2011  – March 2017 TRF7970A

      PRODUCTION DATA.  

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  • TRF7970A 多协议全集成式 13.56MHz RFID 和近场通信 (NFC) 收发器 IC
  1. 1器件概述
    1. 1.1 特性
    2. 1.2 应用范围
    3. 1.3 说明
    4. 1.4 功能方框图
  2. 2修订历史记录
  3. 3Device Characteristics
    1. 3.1 Related Products
  4. 4Terminal Configuration and Functions
    1. 4.1 Pin Diagram
    2. 4.2 Signal Descriptions
      1. Table 4-1 Terminal Functions
  5. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Electrical Characteristics
    5. 5.5 Thermal Resistance Characteristics
    6. 5.6 Switching Characteristics
  6. 6Detailed Description
    1. 6.1  Overview
      1. 6.1.1 RFID and NFC Operation – Reader and Writer
      2. 6.1.2 NFC Device Operation – Initiator
      3. 6.1.3 NFC Device Operation – Target
        1. 6.1.3.1 Active Target
        2. 6.1.3.2 Passive Target
        3. 6.1.3.3 Card Emulation
    2. 6.2  System Block Diagram
    3. 6.3  Power Supplies
      1. 6.3.1 Supply Arrangements
      2. 6.3.2 Supply Regulator Settings
      3. 6.3.3 Power Modes
    4. 6.4  Receiver – Analog Section
      1. 6.4.1 Main and Auxiliary Receivers
      2. 6.4.2 Receiver Gain and Filter Stages
    5. 6.5  Receiver – Digital Section
      1. 6.5.1 Received Signal Strength Indicator (RSSI)
        1. 6.5.1.1 Internal RSSI – Main and Auxiliary Receivers
        2. 6.5.1.2 External RSSI
    6. 6.6  Oscillator Section
    7. 6.7  Transmitter – Analog Section
    8. 6.8  Transmitter – Digital Section
    9. 6.9  Transmitter – External Power Amplifier and Subcarrier Detector
    10. 6.10 TRF7970A IC Communication Interface
      1. 6.10.1 General Introduction
        1. 6.10.1.1 Continuous Address Mode
        2. 6.10.1.2 Noncontinuous Address Mode (Single Address Mode)
        3. 6.10.1.3 Direct Command Mode
        4. 6.10.1.4 FIFO Operation
      2. 6.10.2 Parallel Interface Mode
      3. 6.10.3 Reception of Air Interface Data
      4. 6.10.4 Data Transmission From MCU to TRF7970A
      5. 6.10.5 Serial Interface Communication (SPI)
        1. 6.10.5.1 Serial Interface Mode With Slave Select (SS)
      6. 6.10.6 Direct Mode
    11. 6.11 TRF7970A Initialization
    12. 6.12 Special Direct Mode for Improved MIFARE Compatibility
    13. 6.13 NFC Modes
      1. 6.13.1 Target
      2. 6.13.2 Initiator
    14. 6.14 Direct Commands from MCU to Reader
      1. 6.14.1 Command Codes
        1. 6.14.1.1  Idle (0x00)
        2. 6.14.1.2  Software Initialization (0x03)
        3. 6.14.1.3  Initial RF Collision Avoidance (0x04)
        4. 6.14.1.4  Response RF Collision Avoidance (0x05)
        5. 6.14.1.5  Response RF Collision Avoidance (0x06, n = 0)
        6. 6.14.1.6  Reset FIFO (0x0F)
        7. 6.14.1.7  Transmission With CRC (0x11)
        8. 6.14.1.8  Transmission Without CRC (0x10)
        9. 6.14.1.9  Delayed Transmission With CRC (0x13)
        10. 6.14.1.10 Delayed Transmission Without CRC (0x12)
        11. 6.14.1.11 Transmit Next Time Slot (0x14)
        12. 6.14.1.12 Block Receiver (0x16)
        13. 6.14.1.13 Enable Receiver (0x17)
        14. 6.14.1.14 Test Internal RF (RSSI at RX Input With TX ON) (0x18)
        15. 6.14.1.15 Test External RF (RSSI at RX Input with TX OFF) (0x19)
    15. 6.15 Register Description
      1. 6.15.1 Register Preset
      2. 6.15.2 Register Overview
      3. 6.15.3 Detailed Register Description
        1. 6.15.3.1 Main Configuration Registers
          1. 6.15.3.1.1 Chip Status Control Register (0x00)
          2. 6.15.3.1.2 ISO Control Register (0x01)
        2. 6.15.3.2 Control Registers – Sublevel Configuration Registers
          1. 6.15.3.2.1  ISO/IEC 14443 TX Options Register (0x02)
          2. 6.15.3.2.2  ISO/IEC 14443 High-Bit-Rate and Parity Options Register (0x03)
          3. 6.15.3.2.3  TX Timer High Byte Control Register (0x04)
          4. 6.15.3.2.4  TX Timer Low Byte Control Register (0x05)
          5. 6.15.3.2.5  TX Pulse Length Control Register (0x06)
          6. 6.15.3.2.6  RX No Response Wait Time Register (0x07)
          7. 6.15.3.2.7  RX Wait Time Register (0x08)
          8. 6.15.3.2.8  Modulator and SYS_CLK Control Register (0x09)
          9. 6.15.3.2.9  RX Special Setting Register (0x0A)
          10. 6.15.3.2.10 Regulator and I/O Control Register (0x0B)
        3. 6.15.3.3 Status Registers
          1. 6.15.3.3.1  IRQ Status Register (0x0C)
          2. 6.15.3.3.2  Interrupt Mask Register (0x0D) and Collision Position Register (0x0E)
          3. 6.15.3.3.3  RSSI Levels and Oscillator Status Register (0x0F)
          4. 6.15.3.3.4  Special Functions Register (0x10)
          5. 6.15.3.3.5  Special Functions Register (0x11)
          6. 6.15.3.3.6  Adjustable FIFO IRQ Levels Register (0x14)
          7. 6.15.3.3.7  NFC Low Field Level Register (0x16)
          8. 6.15.3.3.8  NFCID1 Number Register (0x17)
          9. 6.15.3.3.9  NFC Target Detection Level Register (0x18)
          10. 6.15.3.3.10 NFC Target Protocol Register (0x19)
        4. 6.15.3.4 Test Registers
          1. 6.15.3.4.1 Test Register (0x1A)
          2. 6.15.3.4.2 Test Register (0x1B)
        5. 6.15.3.5 FIFO Control Registers
          1. 6.15.3.5.1 FIFO Status Register (0x1C)
          2. 6.15.3.5.2 TX Length Byte1 Register (0x1D), TX Length Byte2 Register (0x1E)
  7. 7Applications, Implementation, and Layout
    1. 7.1 TRF7970A Reader System Using SPI With SS Mode
      1. 7.1.1 General Application Considerations
      2. 7.1.2 Schematic
    2. 7.2 Layout Considerations
    3. 7.3 Impedance Matching TX_Out (Pin 5) to 50 Ω
    4. 7.4 Reader Antenna Design Guidelines
  8. 8器件和文档支持
    1. 8.1 入门和下一步
    2. 8.2 器件命名规则
    3. 8.3 工具与软件
    4. 8.4 文档支持
    5. 8.5 社区资源
    6. 8.6 商标
    7. 8.7 静电放电警告
    8. 8.8 Glossary
  9. 9机械、封装和可订购信息
  10. 重要声明
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DATA SHEET

TRF7970A 多协议全集成式 13.56MHz RFID 和近场通信 (NFC) 收发器 IC

本资源的原文使用英文撰写。 为方便起见，TI 提供了译文；由于翻译过程中可能使用了自动化工具，TI 不保证译文的准确性。 为确认准确性，请务必访问 ti.com 参考最新的英文版本（控制文档）。

1 器件概述

1.1 特性

  • 支持近场通信 (NFC) 标准 NFCIP-1 (ISO/IEC 18092) 和 NFCIP‑2 (ISO/IEC 21481)
  • 完全集成了以下标准的协议处理：ISO/IEC 15693、ISO/IEC 18000-3、ISO/IEC 14443 A 和 B 以及 FeliCa™
  • 集成式编码器、解码器和数据组帧功能，用于 NFC 发起方运行模式以及有源和无源目标方运行模式，适合所有三种比特率（106kbps、212kbps、424kbps）以及卡仿真
  • 借助带有可编程唤醒电平的射频场检测器，实现 NFC 无源应答器仿真
  • 通过射频场检测器避免 NFC 物理碰撞
  • 通过集成的状态机实现 ISO/IEC 14443 A 防撞（破坏的字节）（应答器仿真或 NFC 无源目标）
  • 输入电压范围：2.7VDC 至 5.5VDC
  • 可编程输出功率：+20dBm (100mW)，+23dBm (200mW)
  • 从 1.8VDC 至 5.5 VDC 的可编程 I/O 电压电平
  • 来自 13.56MHz 或者 27.12MHz 晶振或者振荡器的可编程系统时钟频率输出 (RF，RF/2，RF/4)
  • 针对其它系统组件（微控制器 (MCU)，外设，指示器）的集成电压稳压器输出，20mA（最大值）
  • 可编程调制深度
  • 具有针对“读取漏洞”消除和邻近读取器系统或者周围环境频带内噪声检测的具有接收信号强度指示器 (RSSI) 的双接收器架构
  • 针对超低功耗系统设计的可编程功率模式（断电时 < 1µA）
  • 并行或 SPI 接口（带有 127 字节 FIFO）
  • 温度范围：-40°C 至 110°C
  • 32 引脚 QFN 封装 (5mm × 5mm)

1.2 应用范围

  • 移动器件（平板电脑、手机）
  • 安全配对（Bluetooth®， Wi-Fi®，其他配对无线网络）
  • 公共运输或者赛事票务
  • 护照或者付费 (POS) 读取器系统
  • 近程无线通信任务（固件升级）
  • 产品识别或者认证
  • 医疗设备或者消耗品
  • 访问控制、数字门锁
  • 电子业务卡共享

1.3 说明

TRF7970A 器件是一款用于 13.56MHz NFC/RFID 系统的集成式模拟前端 (AFE) 和多协议数据组帧器件，支持所有的三种 NFC 工作模式：读/写器模式、对等模式和卡仿真模式，符合 ISO/IEC 14443 A 和 B、Sony FeliCa、ISO/IEC 15693、NFCIP-1 (ISO/IEC 18092) 和 NFCIP-2 (ISO/IEC 21481) 等标准。该器件具有内置的编程选项，因此适合于 NFC、接近和邻近识别系统的广泛 应用 。

通过在控制寄存器内选择所需的协议可对此器件进行配置。通过对所有控制寄存器进行直接存取，可根据需要对不同的读取器参数进行微调。

TRF7970A 器件针对所有符合板载 ISO 协议的组帧和同步任务，支持高达 848kbps 的数据速率。TRF7970A 器件还支持 NFC 论坛标签类型 1、2、3、4 和 5 的读写器模式。可通过使用该器件提供的直接模式之一来实现其他标准甚至自定义协议。这些直接模式可让用户完全控制 AFE，并且还可以访问原始子载波数据或者未组帧但已经是 ISO 格式的数据和相关（提取的）时钟信号。

接收器系统具有双输入接收器架构，可最大程度实现通信稳定。接收器还包括多种自动和手动增益控制选项。在 RSSI 寄存器中可获取从应答器、周围信号源或者内部电平接收到的信号强度。

可使用 SPI 或并行接口进行 MCU 和 TRF7970A 器件间的通信。当使用内置的硬件编码器和解码器时，发送和接收功能使用一个 127 字节的 FIFO 寄存器。对于直接发送或接收功能，由于编码器或解码器可被旁路绕开，所以 MCU 可实时地处理数据。

TRF7970A 器件支持 2.7V 至 5.5V 的宽电源电压范围以及 MCU I/O 接口的 1.8V 至 5.5V 数据通信电平。

当使用 5V 电源时，发送器对于 50Ω 负载具有 100mW (+20dBm) 或 200mW (+23dBm) 等效值的可选输出功率电平，并支持可选调制深度的 OOK 和 ASK 调制。

内置的可编程辅助稳压器为 MCU 和读取器系统内的其他外部电路提供高达 20mA 的电源。

通过具有可编程唤醒电平、八种可选电源模式以及超低功耗运行模式的集成射频场检测器，可以轻松开发可靠、经济高效且电池寿命长的设计。

要评估 TRF7970A 多协议收发器 IC，可使用TRF7970AEVM、TRF7970ATB 或 DLP-7970ABP。

器件信息

器件型号封装封装尺寸
TRF7970ARHB VQFN (32) 5mm x 5mm

1.4 功能方框图

Figure 1-1 显示了方框图。

TRF7970A system_block_dgm_slos743.gifFigure 1-1 方框图

2 修订历史记录

Changes from April 18, 2014 to March 27, 2017

  • 通篇更正了 ISO/IEC 标准代号；例如，将 ISO14443 更改为 ISO/IEC 14443Go
  • 更改了以下部分的内容：Section 1.3 - 说明Go
  • Added Section 3.1, Related ProductsGo
  • Moved TSTG from Section 5.2 to Section 5.1, Absolute Maximum RatingsGo
  • Added VOL and VOH to Section 5.4, Electrical CharacteristicsGo
  • Changed the TYP value of the fD_CLKmax parameter from 8 to 4 MHz in Section 5.4, Electrical CharacteristicsGo
  • Throughout document, removed support for application control of Automatic Gain Control (AGC) and Receiver Gain Adjust, because these features were designed for test functionality and not for production useGo
  • Added NFC Type 5 tags to supported list in Section 6.1.1, RFID and NFC Operation – Reader and WriterGo
  • Removed the paragraph that started "The desired system of operation (bit rate) is achieved by..." from Section 6.1.2, NFC Device Operation – InitiatorGo
  • Removed the paragraph that started "The desired system of operation (bit rate) is achieved by..." from Section 6.1.3, NFC Device Operation – TargetGo
  • Throughout document, changed "tag" emulation or emulator to "card" emulation or emulatorGo
  • Added the sentence that starts "For interoperability purposes, TI recommends..." in the first bulleted list item in Section 6.1.3, NFC Device Operation – TargetGo
  • Changed POLLING to SENSF_REQ in the bulleted list item that starts "If the first command is a SENSF_REQ..." and deleted the sentence that started "The POLLING response is sent in..." in Section 6.1.3, NFC Device Operation – TargetGo
  • Updated the bulleted list item that starts "If the first command is ATR_REQ..." in Section 6.1.3, NFC Device Operation – TargetGo
  • Changed "coded as ISO14443" to "SENSB_REQ" in the bulleted list item that starts "If the first command is a SENSB_REQ..." in Section 6.1.3, NFC Device Operation – TargetGo
  • Changed "FeliCa" to "peer-to-peer" in Section 6.1.3.1, Active Target, and Section 6.1.3.2, Passive TargetGo
  • Updated the paragraph that starts "The transmission of a response must occur after RF collision avoidance..." in Section 6.1.3.1, Active TargetGo
  • Updated the paragraph that starts "The transmit system in passive target mode..." in Section 6.1.3.2, Passive TargetGo
  • Added the sentence that starts "For applications in which the TRF7970A may be subjected..." in the second paragraph of Section 6.3, Power SuppliesGo
  • Changed VDD_A to VDD_X in the last sentence that reads "The VDD_X output current should not exceed 20 mA." in the NOTE in Analog Supply Regulator: VDD_AGo
  • Removed the paragraph that started "The RF power amplifier regulator..." from Digital Supply Regulator: VDD_XGo
  • Added the paragraph that starts "As VDD_RF is increased, the system..." in Section 6.3.2, Supply Regulator SettingsGo
  • Removed the paragraphs that started "The main receiver also has..." and "By default, the AGC window comparator..." from Section 6.4.2, Receiver Gain and Filter StagesGo
  • Changed Table 6-5 to match Table 6-37Go
  • Updated Section 6.5, Receiver – Digital Section, to clarify and remove duplicate contentGo
  • Updated the description in Section 6.5.1.2, External RSSIGo
  • Removed "Equivalent Series Resistance" from Table 6-9, Minimum Crystal RecommendationsGo
  • Removed mention of 3-wire SPI and replaced "IRQ" with "Slave Select" in the first paragraph of Section 6.10.1, General IntroductionGo
  • Updated the description of FIFO level interrupts in Section 6.10.1.4, FIFO OperationGo
  • Added "but recommended" to "It is optional but recommended to read the FIFO Status register..." in Section 6.10.3, Reception of Air Interface DataGo
  • Changed the title of Section 6.10.4, Data Transmission From MCU to TRF7970AGo
  • Removed the sentence that started "The choice of one of these modes over another..." from Section 6.10.5, Serial Interface Communication (SPI)Go
  • Updated the paragraph that starts "TI recommends resetting the FIFO after receiving data..." in Section 6.10.5.1, Serial Interface Mode With Slave Select (SS)Go
  • Added the NOTE that starts "An additional direct mode..." in Section 6.10.6, Direct ModeGo
  • Added Section 6.11, TRF7970A InitializationGo
  • Changed the application report that is referenced in Section 6.12, Special Direct Mode for Improved MIFARE™ CompatibilityGo
  • Changed POLLING to SENSF_REQ and updated description in the list item that starts "If the first command is a SENSF_REQ..."Go
  • Updated the description in the list item that starts "If the first command is ATR_REQ..."Go
  • Corrected description of B1 Irq_col in Table 6-18, IRQ Status Register (0x0C) for NFC and Card Emulation Operation: changed from "(as defined in register 0x01)" to "(as defined in register 0x10)" Go
  • Removed mention of collision avoidance commands from Section 6.13.2, InitiatorGo
  • Added and updated comments in Table 6-19, Address and Command Word Bit DistributionGo
  • Removed command code 0x15, Close Slot Sequence, from Table 6-19, Address and Command Word Bit DistributionGo
  • Changed the description in Section 6.14.1.3, Initial RF Collision Avoidance (0x04)Go
  • Changed the description in Section 6.14.1.4, Response RF Collision Avoidance (0x05)Go
  • Changed the description in Section 6.14.1.5, Response RF Collision Avoidance (0x06, n = 0)Go
  • Added "This is used by the ISO/IEC 15693 protocol" to Section 6.14.1.11, Transmit Next Time Slot (0x14)Go
  • Corrected description of B1 Irq_col in Table 6-43, IRQ Status Register (0x0C): changed from "(as defined in register 0x01)" to "(as defined in register 0x10)" Go
  • Changed the description of B5:B3 in Table 6-47 from "...Auxiliary RSSI represents the signal level at RX_IN2" to "...Auxiliary RSSI represents the signal level at RX_IN1"Go
  • Changed Figure 7-1, Application Schematic – SPI With SS Mode MCU InterfaceGo
  • Updated the description in Section 7.1.2, SchematicGo
  • 添加了Section 8.1“入门和后续步骤”Go
  • 添加了Section 8.2“器件命名规则”Go
  • 添加了Section 8.3“工具和软件”Go
  • 更新了Section 8.4“文档支持”Go

3 Device Characteristics

Table 3-1 lists the supported modes of operation for the TRF7970A device.

Table 3-1 Supported Modes of Operation

P2P INITIATOR OR READER/WRITERCARD EMULATIONP2P TARGET
TECHNOLOGYBIT RATE
(kbps)		TECHNOLOGYBIT RATE
(kbps)		TECHNOLOGYBIT RATE
(kbps)
NFC-A and NFC-B
(ISO/IEC 14443 A and B)		 106, 212, 424, 848(1) NFC-A, NFC-B 106 NFC-A 106
NFC-F (JIS: X6319-4) 212, 424 N/A N/A NFC-F 212, 424
NFC-V (ISO/IEC 15693) 6.7, 26.7 N/A N/A N/A N/A
(1) 848 kbps applies to reader/writer mode only.

3.1 Related Products

For information about other devices in this family of products or related products, see the following links.

    Products for TI Wireless ConnectivityConnect more with the industry’s broadest wireless connectivity portfolio.
    Products for NFC / RFIDTI provides one of the industry’s most differentiated NFC and RFID product portfolios and is your solution to meet a broad range of NFC connectivity and RFID identification needs.
    Companion Products for TRF7970AReview products that are frequently purchased or used with this product.
    Reference Designs for TRF7970AThe TI Designs Reference Design Library is a robust reference design library that spans analog, embedded processor, and connectivity. Created by TI experts to help you jump start your system design, all TI Designs include schematic or block diagrams, BOMs, and design files to speed your time to market. Search and download designs at ti.com/tidesigns.

4 Terminal Configuration and Functions

 
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