SLVUCJ7 October   2023 TPS25730

 

  1.   1
  2.   Read This First
    1.     About This Manual
    2.     Notational 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
    3. 1.3 Unique Address Interface
      1. 1.3.1 Unique Address Interface Protocol
  4. 2Unique Address Interface Register Detailed Descriptions
    1. 2.1 0x31 RX_SINK_CAPS Register
    2. 2.2 0x33 TX_SINK_CAPS Register
    3. 2.3 0x34 ACTIVE_CONTRACT_PDO Register
    4. 2.4 0x35 ACTIVE_CONTRACT_RDO Register
  5. 34CC Task Detailed Descriptions
    1. 3.1 Overview
    2. 3.2 PD Message Tasks
      1. 3.2.1 'GSrC' - PD Get Source Capabilities
  6.   Revision History

1.2.1 Overview

The PD Controller provides one I2C target. The I2Ct target is meant to be connected to an Embedded Controller (EC).

The Host Interface defines how the registers are accessed from I2C target port ands and all target addresses. target Address #1 is selected by the customer using the ADCIN1 and ADCIN2 pins on the PD controller.

The Host Interface provides general status information to the controller of these I2C interfaces about the PD Controller, ability to control the PD Controller, status of USB Type-C Port and communications to/from a connected device (Port Partner) and/or cable plug via USB PD messages. All Host Interface communication that uses the Unique I2C address is referred to as Unique Address Interface.

The PD Controller supports a register-based Unique Address Interface. Chapter 2 provides detailed Unique Address Interface register descriptions.

The key to the protocol diagrams is in the SMBus Specification, version 2.0 and is repeated here in part in Figure 1-1.

GUID-20230821-SS0I-BJLZ-T0RX-M7TWFCMB858W-low.svg Figure 1-1 I2C Read/Write Protocol Key