SNLS614C September   2018  – April 2024 DP83869HM

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Timing Diagrams
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  WoL (Wake-on-LAN) Packet Detection
        1. 7.3.1.1 Magic Packet Structure
        2. 7.3.1.2 Wake-on-LAN Configuration and Status
      2. 7.3.2  Start of Frame Detect for IEEE 1588 Time Stamp
        1. 7.3.2.1 SFD Latency Variation and Determinism
          1. 7.3.2.1.1 1000Mb SFD Variation in Master Mode
          2. 7.3.2.1.2 1000Mb SFD Variation in Slave Mode
          3. 7.3.2.1.3 100-Mb SFD Variation
      3. 7.3.3  Clock Output
      4. 7.3.4  Loopback Mode
        1. 7.3.4.1 Near-End Loopback
          1. 7.3.4.1.1 MII Loopback
          2. 7.3.4.1.2 PCS Loopback
          3. 7.3.4.1.3 Digital Loopback
          4. 7.3.4.1.4 Analog Loopback
          5. 7.3.4.1.5 External Loopback
          6. 7.3.4.1.6 Far-End (Reverse) Loopback
        2.       37
      5. 7.3.5  BIST Configuration
      6. 7.3.6  Interrupt
      7. 7.3.7  Power-Saving Modes
        1. 7.3.7.1 IEEE Power Down
        2. 7.3.7.2 Active Sleep
        3. 7.3.7.3 Passive Sleep
      8. 7.3.8  Mirror Mode
      9. 7.3.9  Speed Optimization
      10. 7.3.10 Cable Diagnostics
        1. 7.3.10.1 TDR
      11. 7.3.11 Fast Link Drop
      12. 7.3.12 Jumbo Frames
    4. 7.4 Device Functional Modes
      1. 7.4.1  Copper Ethernet
        1. 7.4.1.1 1000BASE-T
        2. 7.4.1.2 100BASE-TX
        3. 7.4.1.3 10BASE-Te
      2. 7.4.2  Fiber Ethernet
        1. 7.4.2.1 1000BASE-X
        2. 7.4.2.2 100BASE-FX
      3. 7.4.3  Serial GMII (SGMII)
      4. 7.4.4  Reduced GMII (RGMII)
        1. 7.4.4.1 1000Mbps Mode Operation
        2. 7.4.4.2 1000Mbps Mode Timing
        3. 7.4.4.3 10 and 100Mbps Mode
      5. 7.4.5  Media Independent Interface (MII)
      6. 7.4.6  Bridge Modes
        1. 7.4.6.1 RGMII-to-SGMII Mode
        2. 7.4.6.2 SGMII-to-RGMII Mode
        3.       67
      7. 7.4.7  Media Convertor Mode
      8. 7.4.8  Register Configuration for Operational Modes
        1. 7.4.8.1 RGMII-to-Copper Ethernet Mode
        2. 7.4.8.2 RGMII-to-1000Base-X Mode
        3. 7.4.8.3 RGMII-to-100Base-FX Mode
        4. 7.4.8.4 RGMII-to-SGMII Bridge Mode
        5. 7.4.8.5 1000M Media Convertor Mode
        6. 7.4.8.6 100M Media Convertor Mode
        7. 7.4.8.7 SGMII-to-Copper Ethernet Mode
      9. 7.4.9  Serial Management Interface
        1. 7.4.9.1 Extended Register Space Access
          1. 7.4.9.1.1 Read (No Post Increment) Operation
          2. 7.4.9.1.2 Write (No Post Increment) Operation
      10. 7.4.10 Auto-Negotiation
        1. 7.4.10.1 Speed and Duplex Selection - Priority Resolution
        2. 7.4.10.2 Master and Slave Resolution
        3. 7.4.10.3 Pause and Asymmetrical Pause Resolution
        4. 7.4.10.4 Next Page Support
        5. 7.4.10.5 Parallel Detection
        6. 7.4.10.6 Restart Auto-Negotiation
        7. 7.4.10.7 Enabling Auto-Negotiation Through Software
        8. 7.4.10.8 Auto-Negotiation Complete Time
        9. 7.4.10.9 Auto-MDIX Resolution
    5. 7.5 Programming
      1. 7.5.1 Strap Configuration
        1. 7.5.1.1 Straps for PHY Address
        2. 7.5.1.2 Strap for DP83869HM Functional Mode Selection
        3. 7.5.1.3 LED Default Configuration Based on Device Mode
        4. 7.5.1.4 Straps for RGMII/SGMII to Copper
        5. 7.5.1.5 Straps for RGMII to 1000Base-X
        6. 7.5.1.6 Straps for RGMII to 100Base-FX
        7. 7.5.1.7 Straps for Bridge Mode (SGMII-RGMII)
        8. 7.5.1.8 Straps for 100M Media Convertor
        9. 7.5.1.9 Straps for 1000M Media Convertor
      2. 7.5.2 LED Configuration
      3. 7.5.3 Reset Operation
        1. 7.5.3.1 Hardware Reset
        2. 7.5.3.2 IEEE Software Reset
        3. 7.5.3.3 Global Software Reset
        4. 7.5.3.4 Global Software Restart
    6. 7.6 Register Maps
      1. 7.6.1 DP83869 Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Copper Ethernet Typical Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Clock Input
            1. 8.2.1.2.1.1 Crystal Recommendations
            2. 8.2.1.2.1.2 External Clock Source Recommendation
          2. 8.2.1.2.2 Magnetics Requirements
            1. 8.2.1.2.2.1 Magnetics Connection
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Fiber Ethernet Typical Ethernet
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Transceiver Connections
        3. 8.2.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Two-Supply Configuration
      2. 8.3.2 Three-Supply Configuration
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
        1. 8.4.1.1 Signal Traces
          1. 8.4.1.1.1 MAC Interface Layout Guidelines
            1. 8.4.1.1.1.1 SGMII Layout Guidelines
            2. 8.4.1.1.1.2 RGMII Layout Guidelines
          2. 8.4.1.1.2 MDI Layout Guidelines
        2. 8.4.1.2 Return Path
        3. 8.4.1.3 Transformer Layout
        4. 8.4.1.4 Metal Pour
        5. 8.4.1.5 PCB Layer Stacking
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.4.10.6 Restart Auto-Negotiation

If a link is established by successful Auto-Negotiation and then lost, the Auto-Negotiation process resumes to determine the configuration for the link. This function ensures that a link can be re-established if the cable becomes disconnected and reconnected. After Auto-Negotiation is completed, it may be restarted at any time by writing 1 to bit 9 of the BMCR (register address 0h). A restart Auto-Negotiation request from any entity, such as a management agent, causes DP83869HM to halt data transmission or link pulse activity until the break_link_timer expires. Consequently, the Link Partner goes into link fail mode and the resume Auto-Negotiation. The DP83869HM resumes Auto-Negotiation after the break_link_timer has expired by transmitting FLP (Fast Link Pulse) bursts.