ZHCSLM6A december   2021  – june 2023 TDP0604

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
    9. 6.9 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  4-Level Inputs
      2. 8.3.2  I/O Voltage Level Selection
      3. 8.3.3  HPD_OUT
      4. 8.3.4  Lane Control
      5. 8.3.5  Swap
      6. 8.3.6  Linear and Limited Redriver
      7. 8.3.7  Main Link Inputs
      8. 8.3.8  Receiver Equalizer
      9. 8.3.9  CTLE Bypass
      10. 8.3.10 Input Signal Detect
      11. 8.3.11 Main Link Outputs
        1. 8.3.11.1 Transmitter Bias
        2. 8.3.11.2 Transmitter Impedance Control
        3. 8.3.11.3 TX Slew Rate Control
        4. 8.3.11.4 TX Pre-Emphasis and De-Emphasis Control
        5. 8.3.11.5 TX Swing Control
      12. 8.3.12 DDC Buffer
      13. 8.3.13 HDMI DDC Capacitance
      14. 8.3.14 DisplayPort
    4. 8.4 Device Functional Modes
      1. 8.4.1 MODE Control
        1. 8.4.1.1 I2C Mode (MODE = "F")
        2. 8.4.1.2 Pin Strap Modes
          1. 8.4.1.2.1 Pin-Strap: HDMI 1.4 and HDMI 2.0 Functional Description
      2. 8.4.2 DDC Snoop Feature
        1. 8.4.2.1 HDMI Type
      3. 8.4.3 Low Power Modes
    5. 8.5 Programming
      1. 8.5.1 Pseudocode Examples
        1. 8.5.1.1 HDMI 2.0 Source Example with DDC Snoop and DDC Buffer Enabled
      2. 8.5.2 TDP0604 I2C Address Options
      3. 8.5.3 I2C Target Behavior
    6. 8.6 Register Maps
      1. 8.6.1 TDP0604 Registers
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Source-Side Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Pre-Channel (LAB)
        2. 9.2.2.2 Post-Channel (LCD)
        3. 9.2.2.3 Common Mode Choke
        4. 9.2.2.4 ESD Protection
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
      1. 9.3.1 Supply Decoupling
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 接收文档更新通知
    3. 10.3 支持资源
    4. 10.4 Trademarks
    5. 10.5 静电放电警告
    6. 10.6 术语表
  12. 11Mechanical, Packaging, and Orderable Information

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8.4.2 DDC Snoop Feature

As part of discovery the source reads the sink E-EDID information to understand the sink’s capabilities. Part of this read is HDMI Forum Vendor Specific Data Block (HF-VSDB) located at target address 0xA8. From the LV_DDC_SDA and LV_DDC_SCL pins the TDP0604 DDC snoop function will monitor both reads and writes to TMDS Configuration at offset 20h of the Status and Control Data Channel Structure (SCDCS) located within the HF-VSDB. The DDC snoop function resides on the LV_DDC_SDA and LV_DDC_SCL pins.

The TDP0604 has similar SCDCS registers within its register space. Through TDP0604 local I2C interface, external microprocessor can control TDP0604 to perform all the necessary functions required for each HDMI type.