SNLA431 January   2024 DP83TC812R-Q1 , DP83TC812S-Q1

 

  1.   1
  2.   Trademarks
  3. 1Preface
  4.   Notational Conventions
  5. 2Related Documentation
  6. 3Support Resources
  7. 4Troubleshooting the PHY Application
    1. 4.1  Schematic and Layout Checklist
    2. 4.2  Verify Successful Power-up of PHY
    3. 4.3  Peripheral Pin Checks
      1. 4.3.1 Probe the RESET_N pin
      2. 4.3.2 Probe the INH pin
      3. 4.3.3 Probe the CLKOUT pin
      4. 4.3.4 Probe the Serial Management Interface (MDC, MDIO) Pins
    4. 4.4  Register Dump Comparison
    5. 4.5  Verifying Strap Configurations
    6. 4.6  Check the MDI Signal
    7. 4.7  Link Up Failed Common Issues
    8. 4.8  Signal Quality Check
    9. 4.9  Power Up Timing
    10. 4.10 Loopback Testing
    11. 4.11 Debugging the MAC Interface
    12. 4.12 Verify Open Alliance PMA Compliance
    13. 4.13 Tools and References
      1. 4.13.1 DP83TC812 Register Access
      2. 4.13.2 DP83TC812 USB2MDIO Scripts
      3. 4.13.3 Extended Register Access
      4. 4.13.4 Software and Driver Debug on Linux
        1. 4.13.4.1 Commonly Seen Linux Terminal Outputs
  8. 5Conclusion

Notational Conventions

This document uses the following conventions.

  • Hexadecimal numbers can be shown with the suffix h or the prefix 0x. For example, the following number is 40 hexadecimal (decimal 64): 40h or 0x40.
  • Registers in this document are shown in figures and described in tables.
    • Each register figure shows a rectangle divided into fields that represent the fields of the register. Each field is labeled with its bit name, its beginning and ending bit numbers above, and its read/write properties with default reset value below. A legend explains the notation used for the properties.
    • Reserved bits in a register figure can have one of multiple meanings:
      • Not implemented on the device
      • Reserved for future device expansion
      • Reserved for TI testing
      • Reserved configurations of the device that are not supported
    • Writing nondefault values to the Reserved bits could cause unexpected behavior and should be avoided.