ZHCSMM7 April   2022 TUSB1004

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
    1.     说明
  3. 3 Revision History
  4. 4 Pin Configuration and Functions
  5. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Power Supply Characteristics
    6. 5.6  Control I/O DC Electrical Characteristics
    7. 5.7  USB Electrical Characteristics
    8. 5.8  Timing Requirements
    9. 5.9  Switching Characteristics
    10. 5.10 Typical Characteristics
  6. 6 Parameter Measurement Information
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 4-Level Inputs
      2. 7.3.2 USB Receiver Linear Equalization
        1. 7.3.2.1 Linear EQ Configuration
        2. 7.3.2.2 Full Adaptive Equalization
        3. 7.3.2.3 Fast Adaptive Equalization
      3. 7.3.3 USB Transmitter
        1. 7.3.3.1 Linearity VOD
        2. 7.3.3.2 Limited VOD
        3. 7.3.3.3 Transmit Equalization (Limited Redriver Mode Only)
      4. 7.3.4 USB 3.1 x2 Description
      5. 7.3.5 USB Polarity Inversion
      6. 7.3.6 Receiver Detect Control
    4. 7.4 Device Functional Modes
      1. 7.4.1 MODE Pin
      2. 7.4.2 Rx EQ Configuration in Pin-Strap Mode
      3. 7.4.3 USB 3.2 Power States
      4. 7.4.4 Disabling U1 and U2
    5. 7.5 Programming
      1. 7.5.1 Pseudocode Examples
        1. 7.5.1.1 Fixed EQ with Linear Redriver Mode
        2. 7.5.1.2 Fixed EQ with Limited Redriver Mode
        3. 7.5.1.3 Fast AEQ with Linear Redriver Mode
        4. 7.5.1.4 Fast AEQ with Limited Redriver Mode
        5. 7.5.1.5 Full AEQ with Linear Redriver Mode
        6. 7.5.1.6 Full AEQ with Limited Redriver Mode
      2. 7.5.2 TUSB1004 I2C Address Options
      3. 7.5.3 TUSB1004 I2C Target Behavior
    6. 7.6 Register Map
      1. 7.6.1 TUSB1004 Registers
  8. 8 Application and Implementation
    1. 8.1 Application Information
  9. 9 Typical Application
  10. 10Design Requirements
  11. 11Detailed Design Procedure
    1. 11.1 USB SSTX1/2 Receiver Configuration
    2. 11.2 USB CRX1/2 Receiver Configuration
      1. 11.2.1 Fixed Equalization
      2. 11.2.2 Full Adaptive Equalization
      3. 11.2.3 Fast Adaptive Equalization
  12. 12Application Curves
  13. 13Power Supply Recommendations
  14. 14Layout
    1. 14.1 Layout Guidelines
    2. 14.2 Layout Example
  15. 15Device and Documentation Support
    1. 15.1 接收文档更新通知
    2. 15.2 支持资源
    3. 15.3 Trademarks
    4. 15.4 Electrostatic Discharge Caution
    5. 15.5 术语表
  16. 16Mechanical, Packaging, and Orderable Information

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11.2.1 Fixed Equalization

In Fixed EQ operation, a single EQ setting is used for all possible devices inserted into the USB receptacle (with or without an USB cable). It is recommended to set TUSB1004 CEQ[1:0] pins if pin-strap mode, or CEQ1_SEL and CEQ2_SEL if I2C mode to about 4 db to 5 dB greater than loss of the post channel (XCD). For example, if post channel is 0.5 inches, then assuming -1 dB per inch at 5 GHz, CEQ1_SEL and CEQ2_SEL should be programmed to 4.5 to 5.5 dB. It is recommended to perform USB 3.1 Rx JTOL long and short channel tests to optimize the setting. Depending of the USB 3.2 Host, a single EQ setting which satisfies both the long and short channel tests may not be possible. If this is the case, then it is recommended to use AEQ mode.