SBAA818 May   2026 TUSB2E221

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Different ways to configure the TUSB2E221
    1. 2.1 I2C Configuration
    2. 2.2 Pin-strap Configuration
      1. 2.2.1 USB2 PHY Configuration
      2. 2.2.2 eUSB2 PHY Configuration
  6. 3Layout Guidelines
    1. 3.1 Layout Guidelines for Pin-strap mode
    2. 3.2 Layout Guidelines for I2C configuration
  7. 4Miscellaneous Pin Configuration
    1. 4.1 Power Pins
    2. 4.2 Control Pins
  8. 5Summary
  9. 6References

3.2 Layout Guidelines for I2C configuration

For I2C mode, the trace length of both the eUSB2 trace and the USB2 trace can change depending on how their respective PHYs are configured. By following table 5-3 through table 5-6 of the TUSB2E221 datasheet, the recommended trace length of the USB2 and eUSB2 data lanes can be approximated based on the set register values.