SLVUCR7 September   2024 TPS26750

 

  1.   1
  2.   Read This First
    1.     About This Manual
    2.     National Conventions
    3.     Glossary
    4.     Related Documents
    5.     Support Resources
    6.     Trademarks
  3. 1Introduction
    1. 1.1 Introduction
      1. 1.1.1 Purpose and Scope
    2. 1.2 PD Controller Host Interface Description
      1. 1.2.1 Overview
      2. 1.2.2 Register and field notation
    3. 1.3 Unique Address Interface
      1. 1.3.1 Unique Address Interface Protocol
  4. 2PD Controller Policy Modes
    1. 2.1 Overview
    2. 2.2 Source Policy Mode
    3. 2.3 Sink Policy Mode
  5. 3Register Overview
  6. 4TPS26750 Registers
  7. 54CC Task Detailed Descriptions
    1. 5.1 Overview
    2. 5.2 CPU Control Tasks
      1. 5.2.1 'Gaid' - Return to normal operation
      2. 5.2.2 'GAID' - Cold reset request
    3. 5.3 PD Message Tasks
      1. 5.3.1  'SWSk' - PD PR_Swap to Sink
      2. 5.3.2  'SWSr' - PD PR_Swap to Source
      3. 5.3.3  'SWDF' - PD DR_Swap to DFP
      4. 5.3.4  'SWUF' - PD DR_Swap to UFP
      5. 5.3.5  'GSkC' - PD Get Sink Capabilities
      6. 5.3.6  'GSrC' - PD Get Source Capabilities
      7. 5.3.7  'ESkC' - PD EPR Get Sink Capabilities
      8. 5.3.8  'ESrC' - PD EPR Get Source Capabilities
      9. 5.3.9  'GPPI' - PD Get Port Partner Information
      10. 5.3.10 'SSrC' - PD Send Source Capabilities
      11. 5.3.11 'MBRd' - Message Buffer Read
    4. 5.4 Patch Bundle Update Tasks
      1. 5.4.1 'PBMs' - Start Patch Burst Mode Download Sequence
      2. 5.4.2 'PBMc' - Patch Burst Mode Download Complete
      3. 5.4.3 'PBMe' - End Patch Burst Mode Download Sequence
      4. 5.4.4 'GO2P' - Go to Patch Mode
      5. 5.4.5 'FLrd' - Flash Memory Read
      6. 5.4.6 'FLad' - Flash Memory Write Start Address
      7. 5.4.7 'FLwd' - Flash Memory Write
      8. 5.4.8 'FLvy' - Flash Memory Verify
    5. 5.5 System Tasks
      1. 5.5.1 'DBfg' - Clear Dead Battery Flag
      2. 5.5.2 'I2Cr' - I2C read transaction
      3. 5.5.3 'I2Cw' - I2C write transaction
      4. 5.5.4 'GPsh' - set GPIO high
      5. 5.5.5 'GPsl' - set GPIO low
  8. 6User Reference
    1. 6.1 PD Controller Application Customization
    2. 6.2 Loading a Patch Bundle
    3. 6.3 AUTO_NEGOTIATE_SINK Register
      1. 6.3.1 AUTO_NEGOTIATE_SINK usage example #1
      2. 6.3.2 AUTO_NEGOTIATE_SINK usage example #2
      3. 6.3.3 AUTO_NEGOTIATE_SINK usage example #3
      4. 6.3.4 AUTO_NEGOTIATE_SINK usage example #4
    4. 6.4 IO_CONFIG Register
      1. 6.4.1 GPIO Events
  9. 7Revision History

5.3.1 'SWSk' - PD PR_Swap to Sink

Table 5-4 'SWSk' - PD PR_Swap to Sink
DescriptionThe 'SWSk' Task instructs PD Controller to attempt to become a Sink through PR_Swap at the first opportunity while maintaining policy engine compliance.
INPUT DATAXNone
OUTPUT DATAXByte 1: Standard Task Return Code. See also Table 5-1.
Task CompletionThe 'SWSk' Task completes either when the PR_Swap is finished or it is otherwise determined to not be possible or fails. The Task can continue to run because of Wait messages being sent by the Source. The 'SWSk' Task shall be considered rejected if:
  • The Source indicated through Source Capabilities that it does not support Dual-Role Power.
  • The PR_Swap is Rejected.
The 'SWSk' Task shall be considered timed-out if:
  • The PR_Swap is Accepted but failed to complete per the PD spec.
The 'SWSk' Task shall be considered successful if:
  • PD Controller is already in the Sink power role.
  • The PR_Swap is Accepted and completes normally.
Side EffectsWhen the 'SWSk' Task completes successfully PD Controller will have transitioned to the Sink power role, which impacts other registers. If the PR_Swap fails after the Accept is sent then Soft and/or Hard Resets are likely to occur per PD spec requirements.
Additional InformationNone
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