SNLA246D October   2015  – May 2026 DP83867CR , DP83867CS , DP83867E , DP83867IR , DP83867IS

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1DP83867 Application Overview
  5. 2Troubleshooting the Application
    1. 2.1 Schematic and Layout Checklist
    2. 2.2 Device Health Checks
      1. 2.2.1 Voltage Checks
      2. 2.2.2 Probe the RESET_N Signal
      3. 2.2.3 Probe RBIAS
      4. 2.2.4 Probe the XI Clock
      5. 2.2.5 Probe the Strap Pins During Initialization
      6. 2.2.6 Probe the Serial Management Interface (MDC, MDIO)
        1. 2.2.6.1 Read and Check Register Values
    3. 2.3 MDI Health Checks
      1. 2.3.1 Magnetics
      2. 2.3.2 Probe the MDI Signals
      3. 2.3.3 Check the Link Quality
        1. 2.3.3.1 Improving Short Cable Link Margin
        2. 2.3.3.2 Improving Inter-channel Link Margin
      4. 2.3.4 PMA Compliance
    4. 2.4 MII Health Checks
      1. 2.4.1 MII Check
      2. 2.4.2 GMII Check
      3. 2.4.3 RGMII Check
      4. 2.4.4 SGMII Check
    5. 2.5 Loopback and PRBS
      1. 2.5.1 Loopback Modes
      2. 2.5.2 Transmitting and Receiving Packets with the MAC
      3. 2.5.3 Transmitting and Receiving Packets with BIST
  6. 3Application Specific Debugs
    1. 3.1 Link up in 100Mbps Full Duplex Force Mode
    2. 3.2 Unstable Link Up Debug in 1Gbps communication
    3. 3.3 DP83867PHY and DP83867PHY Cannot Link Up in 1Gbps
    4. 3.4 EMC Debug
    5. 3.5 Packet Errors in Links with Low IPG
    6. 3.6 10Base-Te TP_IDL Failure
    7. 3.7 Slow RGMII Rise/Fall Times
  7. 4Tools and References
    1. 4.1 Extended Register Access
  8. 5Conclusion
  9. 6References
  10. 7Revision History

2.1 Schematic and Layout Checklist

The DP83867 Schematic Checklist and DP8386X Layout Checklist compile the best practices for designing with DP83867 into an easy-to-use document. The recommendation is to go through these documents for a detailed description what connections and components are needed for the PHY to work.

The following sections can present expected behaviors if the PHY is powered and initialized correctly. Any deviations from expected behaviors can point to errors due to incorrect peripheral circuity.