ZHCSE15F July   2015  – May 2018 SN65DP159 , SN75DP159

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      DP159 母板应用结构
      2.      DP159 软件狗应用结构
  4. 4 修订历史记录
  5. 5 说明 （续）
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Power Supply Electrical Characteristics
    6. 7.6  Differential Input Electrical Characteristics
    7. 7.7  HDMI and DVI TMDS Output Electrical Characteristics
    8. 7.8  AUX, DDC, and I2C Electrical Characteristics
    9. 7.9  HPD Electrical Characteristics
    10. 7.10 HDMI and DVI Main Link Switching Characteristics
    11. 7.11 AUX Switching Characteristics (Only for RGZ Package)
    12. 7.12 HPD Switching Characteristics
    13. 7.13 DDC and I2C Switching Characteristics
    14. 7.14 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Reset Implementation
      2. 9.3.2 Operation Timing
      3. 9.3.3 I2C-over-AUX to DDC Bridge (SNx5DP159 48-Pin Package Version Only)
      4. 9.3.4 Input Lane Swap and Polarity Working
      5. 9.3.5 Main Link Inputs
      6. 9.3.6 Main Link Inputs Debug Tools
      7. 9.3.7 Receiver Equalizer
      8. 9.3.8 Termination Impedance Control
      9. 9.3.9 TMDS Outputs
        1. 9.3.9.1 Pre-Emphasis/De-Emphasis
    4. 9.4 Device Functional Modes
      1. 9.4.1 Retimer Mode
      2. 9.4.2 Redriver Mode
      3. 9.4.3 DDC Training for HDMI2.0 Data Rate Monitor
      4. 9.4.4 DDC Functional Description
    5. 9.5 Register Maps
      1. 9.5.1 DP-HDMI Adaptor ID Buffer
      2. 9.5.2 Local I2C Interface Overview
      3. 9.5.3 I2C Control Behavior
      4. 9.5.4 I2C Control and Status Registers
        1. 9.5.4.1 Bit Access Tag Conventions
        2. 9.5.4.2 CSR Bit Field Definitions
          1. 9.5.4.2.1 ID Registers
          2. 9.5.4.2.2 Misc Control
          3. 9.5.4.2.3 HDMI Control
          4. 9.5.4.2.4 Equalization Control Register
          5. 9.5.4.2.5 EyeScan Control Register
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Use Case of SNx5DP159
      2. 10.1.2 DDC Pullup Resistors
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curve
    3. 10.3 System Example
      1. 10.3.1 Compliance Testing
  11. 11Power Supply Recommendations
    1. 11.1 Power Management
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Examples
    3. 12.3 Thermal Considerations
  13. 13器件和文档支持
    1. 13.1 相关链接
    2. 13.2 文档支持
      1. 13.2.1 相关文档
    3. 13.3 接收文档更新通知
    4. 13.4 社区资源
    5. 13.5 商标
    6. 13.6 静电放电警告
    7. 13.7 术语表
  14. 14机械、封装和可订购信息

9.3.9.1 Pre-Emphasis/De-Emphasis

The SNx5DP159 provides De-emphasis as a way to compensate for the ISI loss between the TMDS outputs and the receiver it is driving. There are two methods to implement this function. When in pin strapping mode the PRE_SEL pin controls this. The PRE_SEL pin provides –2-dB, or 0-dB de-emphasis, which allows output signal pre-conditioning to offset interconnect losses from the SNx5DP159 device outputs to a TMDS receiver. TI recommends setting PRE_SEL at 0 dB while connecting to a receiver through a short PCB route. When pulled to ground with a 65-kΩ resistor –2-dB can be realized, see Figure 9. When using I2C, Reg0Ch[1:0] is used to make these adjustments.

As there are times true pre-emphasis may be the best solution there are two ways to accomplish this. If pin strapping is being use the best method is to reduce the Vsadj resistor value increasing the VOD and then pulling the PRE_SEL pin to ground using the 65-kΩ resistor, see Figure 28. If using I2C this can be accomplished using two methods. First is similar to pin strapping by adjusting the Vsadj resistor value and then implementing –2-dB de-emphasis. Second method is to set Reg0Ch[7:5] = 011 and the set Reg0Ch[1:0] = 01 which accomplishes the same pre-emphasis setting. See Figure 29.

SN65DP159 SN75DP159 pre-emp_pin_strap_llsej2.gifFigure 28. Pre-Emphasis Using Pin Strapping Method
SN65DP159 SN75DP159 pre_emp_I2C_llsej2.gifFigure 29. Pre-Emphasis Using I2C Method