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

DP83TC812 Troubleshooting Guide