SLVUC05A November   2020  – July 2022 TPS25750

 

  1.   Read This First
    1.     About This Manual
    2.     Notational Conventions
    3.     Glossary
    4.     Related Documents
    5.     Support Resources
    6.     Trademarks
  2. 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
      2. 1.3.2 Unique Address Interface Registers
  3. 2Unique Address Interface Register Detailed Descriptions
    1. 2.1  0x03 MODE Register
    2. 2.2  0x0D DEVICE_CAPABILITIES Register
    3. 2.3  0x14 - 0x19 INT_EVENT, INT_MASK, INT_CLEAR Registers
    4. 2.4  0x1A STATUS Register
    5. 2.5  0x26 POWER_PATH_STATUS Register
    6. 2.6  0x29 PORT_CONTROL Register
    7. 2.7  0x2D BOOT_STATUS Register
    8. 2.8  0x30 RX_SOURCE_CAPS Register
    9. 2.9  0x31 RX_SINK_CAPS Register
    10. 2.10 0x32 TX_SOURCE_CAPS Register
    11. 2.11 0x33 TX_SINK_CAPS Register
    12. 2.12 0x34 ACTIVE_CONTRACT_PDO Register
    13. 2.13 0x35 ACTIVE_CONTRACT_RDO Register
    14. 2.14 0x3F POWER_STATUS Register
    15. 2.15 0x40 PD_STATUS Register
    16. 2.16 GPIO Events
    17. 2.17 0x69 TYPEC_STATE Register
    18. 2.18 0x70 SLEEP_CONFIG Register
    19. 2.19 0x72 GPIO_STATUS Register
  4. 34CC Task Detailed Descriptions
    1. 3.1 Overview
    2. 3.2 PD Message Tasks
      1. 3.2.1 'SWSk' - PD PR_Swap to Sink
      2. 3.2.2 'SWSr' - PD PR_Swap to Source
      3. 3.2.3 'SWDF' - PD DR_Swap to DFP
      4. 3.2.4 'SWUF' - PD DR_Swap to UFP
      5. 3.2.5 'GSkC' - PD Get Sink Capabilities
      6. 3.2.6 'GSrC' - PD Get Source Capabilities
      7. 3.2.7 'SSrC' - PD Send Source Capabilities
    3. 3.3 Patch Bundle Update Tasks
      1. 3.3.1 'PBMs' - Start Patch Burst Mode Download Sequence
      2. 3.3.2 'PBMc' - Patch Burst Mode Download Complete
      3. 3.3.3 'PBMe' - End Patch Burst Mode Download Sequence
      4. 3.3.4 Patch Burst Mode Example
      5. 3.3.5 'GO2P' - Go to Patch Mode
    4. 3.4 System Tasks
      1. 3.4.1 'DBfg' - Clear Dead Battery Flag
      2. 3.4.2 'I2Cr' - I2C Read Transaction
      3. 3.4.3 'I2Cw' - I2C Write Transaction
  5. 4User Reference
    1. 4.1 PD Controller Application Customization
    2. 4.2 Loading a Patch Bundle
  6. 5Revision History

3.4.2 'I2Cr' - I2C Read Transaction

Table 3-14 'I2Cr' - Executes I2C Read Transaction on I2Cm
DescriptionThe 'I2Cr' task may be used to cause the PD controller to read from a specified slave address and register offset using a I2C read transaction via the I2Cm_SDA and I2Cm_SCL pins.
INPUT DATABitNameDescription
Byte 3: Number of bytes to read from the slave.
7:0NumBytes.
Byte 2: Register offset to use in the I2C read transaction.
7:0RegisterOffset.
Byte 1: Slave Address.
7Reserved.
6:0Slave to use for the transaction.
OUTPUT DATABitNameDescription
Bytes 2-65: Data Bytes read from the slave (in order received).
511:0Data.
Byte 1: Standard Task Return Code. See also Table 3-1.
Task CompletionThe PD controller completes after it has succesfully read the specified number of bytes, or the I2C transaction terminated for some other reason.
Side EffectsThis task will cause the PD controller to issue a command on the I2Cm port. It can result in INT_EVENT. I2CMasterNACKed being asserted.
Additional InformationNone.