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DP83TC812 Troubleshooting Guide
SNLA431
January 2024
DP83TC812R-Q1
,
DP83TC812S-Q1
CONTENTS
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DP83TC812 Troubleshooting Guide
1
Trademarks
1
Preface
Notational Conventions
2
Related Documentation
3
Support Resources
4
Troubleshooting the PHY Application
4.1
Schematic and Layout Checklist
4.2
Verify Successful Power-up of PHY
4.3
Peripheral Pin Checks
4.3.1
Probe the RESET_N pin
4.3.2
Probe the INH pin
4.3.3
Probe the CLKOUT pin
4.3.4
Probe the Serial Management Interface (MDC, MDIO) Pins
4.4
Register Dump Comparison
4.5
Verifying Strap Configurations
4.6
Check the MDI Signal
4.7
Link Up Failed Common Issues
4.8
Signal Quality Check
4.9
Power Up Timing
4.10
Loopback Testing
4.11
Debugging the MAC Interface
4.12
Verify Open Alliance PMA Compliance
4.13
Tools and References
4.13.1
DP83TC812 Register Access
4.13.2
DP83TC812 USB2MDIO Scripts
4.13.3
Extended Register Access
4.13.4
Software and Driver Debug on Linux
4.13.4.1
Commonly Seen Linux Terminal Outputs
5
Conclusion
IMPORTANT NOTICE
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