SLLSEN9F May   2015  – March 2022 TUSB320

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
      1. 7.2.1 Cables, Adapters, and Direct Connect Devices
        1. 7.2.1.1 USB Type-C Receptacles and Plugs
        2. 7.2.1.2 USB Type-C Cables
        3. 7.2.1.3 Legacy Cables and Adapters
        4. 7.2.1.4 Direct Connect Devices
        5. 7.2.1.5 Audio Adapters
    3. 7.3 Feature Description
      1. 7.3.1 Port Role Configuration
        1. 7.3.1.1 Downstream Facing Port (DFP) – Source
        2. 7.3.1.2 Upstream Facing Port (UFP) – Sink
        3. 7.3.1.3 Dual Role Port (DRP)
      2. 7.3.2 Type-C Current Mode
      3. 7.3.3 Accessory Support
        1. 7.3.3.1 Audio Accessory
        2. 7.3.3.2 Debug Accessory
      4. 7.3.4 I2C and GPIO Control
      5. 7.3.5 VBUS Detection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Unattached Mode
      2. 7.4.2 Active Mode
      3. 7.4.3 Dead Battery Mode
      4. 7.4.4 Shutdown Mode
    5. 7.5 Programming
    6. 7.6 Register Maps
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 DRP in I2C Mode
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 DFP in I2C Mode
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curves
      3. 8.2.3 UFP in I2C Mode
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
        3. 8.2.3.3 Application Curves
    3. 8.3 Initialization Set Up
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.4.3 Dead Battery Mode

During dead battery mode, VDD is not available. CC pins always default to pulldown resistors in dead battery mode. Dead battery mode means:

  • TUSB320 in UFP with 5.1-kΩ ± 20% Rd; cable connected and providing charge
  • TUSB320 in UFP with 5.1-kΩ ± 20% Rd; nothing connected (application could be off or have a discharged battery)

Upon exiting dead battery mode (VDD is active), the software must perform the following sequence in order for Rp to be presented on both CC pins:

  1. Write a 0x04 to I2C address 0x45.
  2. Wait 30ms.
  3. Write a 0x00 to I2C address 0x45.

Between steps 1 and 3, the status flags will be set. The software must ignore these flags when performing the three steps.

Note:

When VDD is off, the TUSB320 non-failsafe pins ( VBUS_DET, ADDR, PORT, ID, OUT[3:1] pins) could back-drive the TUSB320 device if not handled properly. When necessary to pull these pins up, it is recommended to pullup PORT, ADDR, INT_N/OUT3, and ID to the device’s VDD supply. The VBUS_DET must be pulled up to VBUS through a 900-kΩ resistor.