SLLSG10 November   2024 TDP142-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 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 DP Electrical Characteristics
    8. 5.8 Switching Characteristics
    9. 5.9 Typical Characteristics
  7.   Parameter Measurement Information
  8. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 DisplayPort
      2. 6.3.2 Configuration Jumper Levels
      3. 6.3.3 Receiver Linear Equalization
    4. 6.4 Device Functional Modes
      1. 6.4.1 Device Configuration in GPIO Mode
      2. 6.4.2 Device Configuration in I2C Mode
      3. 6.4.3 Linear EQ Configuration
      4. 6.4.4 Operation Timing – Power Up
    5. 6.5 Programming
  9. 7 Register Maps
    1. 7.1 TDP142-Q1 Registers
  10. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 ESD Protection
    2. 8.2 Typical Application
      1. 8.2.1 Source Application Implementation
        1. 8.2.1.1 Design Requirement
        2. 8.2.1.2 Detail Design Procedure
      2. 8.2.2 Sink Application Implementation
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  11. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  12. 10Revision History
  13. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Tape and Reel Information
    2. 11.2 Mechanical Data

6.3.1 DisplayPort

The TDP142-Q1 supports up to four DisplayPort lanes at data rates up to 8.1Gbps (HBR3). The TDP142-Q1 monitors the native AUX traffic as the device traverses between DisplayPort source and DisplayPort sink. For the purposes of reducing power, the TDP142-Q1 manages the number of active DisplayPort lanes based on the content of the AUX transactions. The TDP142-Q1 snoops native AUX writes to the DPCD registers 0x00101 (LANE_COUNT_SET) and 0x00600 (SET_POWER_STATE) of the DisplayPort sink. The TDP142-Q1 disables or enables lanes based on the value written to LANE_COUNT_SET. The TDP142-Q1 disables all lanes when SET_POWER_STATE is in the D3. Otherwise active lanes are based on value of LANE_COUNT_SET.

DisplayPort AUX snooping is enabled by default but can be disabled by changing the AUX_SNOOP_DISABLE register. When AUX snoop is disabled, the TDP142-Q1 DisplayPort lanes are controlled through various configuration registers. When TDP142-Q1 is enabled for GPIO mode (I2C_EN = "0"), the SNOOPENZ pin can be used to disable AUX snooping. When SNOOPENZ pin is high, the AUX snooping functionality is disabled and all four DisplayPort lanes are active.