Manuali utente per Getac Technology Corporation RX10RFID

Sommario

• 1 Device Overview

  1
  • 1.1 Features

    1
  • 1.2 Applications

    1
  • 1.3 Description

    1
  • 1.4 Functional Block Diagram

    2
• Table of Contents

  3
• 2 Revision History

  4
• 3 Device Characteristics

  5
• 4 Terminal Configuration and Functions

  6
  • 4.1 Pin Assignments

    6
  • 4.2 Terminal Functions

    7
• 5 Specifications

  9
  • 5.1 Absolute Maximum Ratings

    9
  • 5.2 Recommended Operating Conditions

    9
  • 5.3 Electrical Characteristics

    10
  • 5.4 Handling Ratings

    11
  • 5.5 Thermal Characteristics

    11
  • 5.6 Switching Characteristics

    11
• 6 Detailed Description

  12
  • 6.1 Overview

    12
    • 6.1.1 RFID and NFC Operation – Reader and Writer

      12
    • 6.1.2 NFC Device Operation – Initiator

      13
    • 6.1.3 NFC Device Operation – Target

      13
      • 6.1.3.1 Active Target

        14
      • 6.1.3.2 Passive Target

        14
      • 6.1.3.3 Card Emulation

        15
  • 6.2 System Block Diagram

    15
  • 6.3 Power Supplies

    15
    • 6.3.1 Supply Arrangements

      16
    • 6.3.2 Supply Regulator Settings

      18
    • 6.3.3 Power Modes

      19
  • 6.4 Receiver – Analog Section

    21
    • 6.4.1 Main and Auxiliary Receivers

      21
    • 6.4.2 Receiver Gain and Filter Stages

      21
  • 6.5 Receiver – Digital Section

    22
    • 6.5.1 Received Signal Strength Indicator (RSSI)

      25
      • 6.5.1.1 Internal RSSI – Main and Auxiliary Receivers

        25
      • 6.5.1.2 External RSSI

        26
  • 6.6 Oscillator Section

    27
  • 6.7 Transmitter – Analog Section

    28
  • 6.8 Transmitter – Digital Section

    28
  • 6.9 Transmitter – External Power Amplifier and Subcarrier Detector

    29
  • 6.10 TRF7970A IC Communication Interface

    30
    • 6.10.1 General Introduction

      30
      • 6.10.1.1 Continuous Address Mode

        32
      • 6.10.1.2 Noncontinuous Address Mode (Single Address Mode)

        33
      • 6.10.1.3 Direct Command Mode

        34
      • 6.10.1.4 FIFO Operation

        34
    • 6.10.2 Parallel Interface Mode

      35
    • 6.10.3 Reception of Air Interface Data

      36
    • 6.10.4 Data Transmission to MCU

      37
    • 6.10.5 Serial Interface Communication (SPI)

      37
      • 6.10.5.1 Serial Interface Mode With Slave Select (SS)

        39
    • 6.10.6 Direct Mode

      43
  • 6.11 Special Direct Mode for Improved MIFARE Compatibility

    48
  • 6.12 NFC Modes

    48
    • 6.12.1 Target

      48
    • 6.12.2 Initiator

      51
  • 6.13 Direct Commands from MCU to Reader

    51
    • 6.13.1 Command Codes

      51
      • 6.13.1.1 Idle (0x00)

        52
      • 6.13.1.2 Software Initialization (0x03)

        52
      • 6.13.1.3 Initial RF Collision Avoidance (0x04)

        53
      • 6.13.1.4 Response RF Collision Avoidance (0x05)

        53
      • 6.13.1.5 Response RF Collision Avoidance (0x06, n = 0)

        53
      • 6.13.1.6 Reset (0x0F)

        53
      • 6.13.1.7 Transmission With CRC (0x11)

        53
      • 6.13.1.8 Transmission Without CRC (0x10)

        53
      • 6.13.1.9 Delayed Transmission With CRC (0x13)

        53
      • 6.13.1.10 Delayed Transmission Without CRC (0x12)

        53
      • 6.13.1.11 Transmit Next Time Slot (0x14)

        53
      • 6.13.1.12 Block Receiver (0x16)

        53
      • 6.13.1.13 Enable Receiver (0x17)

        54
      • 6.13.1.14 Test Internal RF (RSSI at RX Input With TX ON) (0x18)

        54
      • 6.13.1.15 Test External RF (RSSI at RX Input with TX OFF) (0x19)

        54
      • 6.13.1.16 Receiver Gain Adjust (0x1A)

        55
  • 6.14 Register Description

    55
    • 6.14.1 Register Preset

      55
    • 6.14.2 Register Overview

      55
    • 6.14.3 Detailed Register Description

      57
      • 6.14.3.1 Main Configuration Registers

        57
      • 6.14.3.2 Control Registers – Sub Level Configuration Registers

        59
      • 6.14.3.3 Status Registers

        66
      • 6.14.3.4 Test Registers

        72
      • 6.14.3.5 FIFO Control Registers

        73
• 7 Application Schematic and Layout Considerations

  75
  • 7.1 TRF7970A Reader System Using Parallel Microcontroller Interface

    75
    • 7.1.1 General Application Considerations

      75
    • 7.1.2 Schematic

      75
  • 7.2 TRF7970A Reader System Using SPI With SS Mode

    76
    • 7.2.1 General Application Considerations

      76
    • 7.2.2 Schematic

      76
  • 7.3 Layout Considerations

    77
  • 7.4 Impedance Matching TX_Out (Pin 5) to 50 Ω

    77
  • 7.5 Reader Antenna Design Guidelines

    79
• 8 Device and Documentation Support

  80
  • 8.1 Documentation Support

    80
  • 8.2 Community Resources

    80
  • 8.3 Trademarks

    80
  • 8.4 Electrostatic Discharge Caution

    80
  • 8.5 Glossary

    80
• 9 Mechanical Packaging and Orderable Information

  80
  • 9.1 Packaging Information

    80