SPMU380 July   2026 TPS25730A

 

  1.   1
  2. 1Read This First
    1. 1.1 About This Manual
    2. 1.2 Notational Conventions
    3. 1.3 Glossary
    4. 1.4 Related Documents
    5. 1.5 Support Resources
    6. 1.6 Trademarks
  3. 2Introduction
    1. 2.1 Purpose and Scope
    2. 2.2 PD Controller Host Interface Description
      1. 2.2.1 Overview
    3. 2.3 Unique Address Interface
      1. 2.3.1 Unique Address Interface Protocol
  4. 3PD Controller Policy Modes
    1. 3.1 Overview
    2. 3.2 Sink Policy Mode
  5. 4Register Overview
    1. 4.1 TPS25730A Registers
  6. 54CC Task Detailed Descriptions
    1. 5.1 Overview
    2. 5.2 PD Message Tasks
      1. 5.2.1 'GSrC' - PD Get Source Capabilities
      2. 5.2.2 'GPPI' - PD Get Port Partner Information
      3. 5.2.3 'MBRd' - Message Buffer Read
    3. 5.3 System Tasks
      1. 5.3.1 'ANeg' - Auto Negotiate Sink Update
      2. 5.3.2 'DBfg' - Clear Dead Battery Flag
  7. 6User Reference
    1. 6.1 AUTO_NEGOTIATE_SINK Register
      1. 6.1.1 AUTO_NEGOTIATE_SINK Usage Example 1
      2. 6.1.2 AUTO_NEGOTIATE_SINK Usage Example 2
      3. 6.1.3 AUTO_NEGOTIATE_SINK Usage Example 3
      4. 6.1.4 AUTO_NEGOTIATE_SINK Usage Example 4
  8. 7Revision History

3.2 Sink Policy Mode

The PD Controller will always prepare its own Request message based on the settings in the AUTO_NEGOTIATE_SINK register (0x37) and the TX_SINK_CAPS register (0x33). The PD Controller will send its prepared Request message as soon as it is ready. The host can change the AUTO_NEGOTIATE_SINK register and the TX_SINK_CAPS register, then issue the 'ANeg' 4CC Task and the PD controller will re-negotiate the PD contract based on the updated values.