SNLA473 November   2024 DP83867CS , DP83867E , DP83867IS , DP83869HM , DP83TC811S-Q1 , DP83TC812S-Q1 , DP83TC813S-Q1 , DP83TC814S-Q1 , DP83TC817S-Q1 , DP83TC818S-Q1 , DP83TG720S-Q1 , DP83TG721S-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Troubleshooting the MAC Interface - SGMII
    1. 1.1 Verify Bootstrap Configurations
      1. 1.1.1 SGMII Bootstrap Configuration for DP83TG720S-Q1
    2. 1.2 Read and Check Register Values
    3. 1.3 Auto-Negotiation
    4. 1.4 Throughput and Loopback Testing
      1. 1.4.1 Bidirectional Throughput Testing
      2. 1.4.2 RX and TX Throughput Testing
      3. 1.4.3 RX and TX Throughput Testing with Fixed Number of Packets
      4. 1.4.4 Loopback Testing
        1. 1.4.4.1 MII Loopback
        2. 1.4.4.2 Reverse Loopback
    5. 1.5 Check the Clock Signal
    6. 1.6 Measure the SGMII Eye
      1. 1.6.1 SGMII Eye Mask Requirements
    7. 1.7 SGMII Layout
  5. 2Summary
  6. 3References

2 Summary

This application note provides a suggested flow for troubleshooting common SGMII issues. If issues with SGMII persist after following the pointers listed previously, please reach out to a TI representative for further guidance on TI E2E Designs Support Forums.