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

7.3.4 I2C and GPIO Control

The TUSB320 device can be configured for I2C communication or GPIO outputs using the ADDR pin. The ADDR pin is a tri-level control pin. When the ADDR pin is left floating (NC), the TUSB320 device is in GPIO output mode. When the ADDR pin is pulled high or pulled low, the TUSB320 device is in I2C mode.

All outputs for the TUSB320 device are open drain configuration.

The OUT1 and OUT2 pins are used to output the Type-C current mode when in GPIO mode. Additionally, the OUT3 pin is used to communicate the audio accessory mode in GPIO mode. Table 7-3 lists the output pin settings. See the Pin Functions table for more information.

Table 7-3 Simplified Operation for OUT1 and OUT2
OUT1OUT2ADVERTISEMENT
HHDefault Current in Unattached State
HLDefault Current in Attached State
LHMedium Current (1.5 A) in Attached State
LLHigh Current (3.0 A) in Attached State

When operating in I2C mode, the TUSB320 device uses the SCL and SDA lines for clock and data and the INT_N pin to communicate a change in I2C registers, or an interrupt, to the system. The INT_N pin is pulled low when the TUSB320 device updates the registers with new information. The INT_N pin is open drain. The INTERRUPT_STATUS register should be set when the INT_N pin is pulled low. To clear the INTERRUPT_STATUS register, the end user writes to I2C.

When operating in GPIO mode, the OUT3 pin is used in place of the INT_N pin to determine if an audio accessory is detected and attached. The OUT3 pin is pulled low when an audio accessory is detected.

Note:

When using the 3.3 V supply for I2C, the end user must ensure that the VDD is 3 V and above. Otherwise the I2C may back power the device.