SNLA364C March   2021  – June 2022 DP83TD510E

 

  1.   Abstract
  2.   Trademarks
  3. 1 Introduction
  4. 2 1-V and 2.4-V p2p Mode Scripts
  5. 3 Time-Domain Reflectometry
    1. 3.1 TDR Application Startup
      1. 3.1.1 TDR_CFG (Address = 0x001E) [Reset = 0x0000]
      2. 3.1.2 TDR_Fault_Status (Address = 0x030C) [Reset = 0x0000]
    2. 3.2 TDR Test Procedure
  6. 4 Active Link Cable Diagnostics
    1. 4.1 ALCD Application Startup
    2. 4.2 ALCD Test Procedure
      1. 4.2.1 Cable Calibration
      2. 4.2.2 Cable Quality Measurement
  7. 5 Signal Quality Indicator
    1. 5.1 SQI Application Startup
      1. 5.1.1 MSE Detection (Address = 0x0A85 ) [Reset = 0x0000]
    2. 5.2 SQI Test Procedure
  8. 6 Cable Diagnostics Summary
  9. 7 Loopback Modes
    1. 7.1 BISCR (Address = 0x0016) [Reset = 0x0100]
  10. 8 Pseudo-Random Bit Sequence Functions
    1. 8.1 PRBS_CFG_1 (Address = 0x0119) [Reset = 0x0574]
    2. 8.2 PRBS_STATUS_4 (Address = 0x011F) [Reset = 0x0000]
  11. 9 USB to MDIO Procedure
  12. 10IEEE 802.3cg PMA Compliance
  13. 11Revision History

1 Introduction

The DP83TD510E offers cable diagnostic tools to assist in system design and insitu monitoring. Cable diagnostic tools allows designers to quickly bring-up their systems, evaluate the quality of link between PHYs, and effectively identify cable faults. By enabling the PHY to provide valuable information about the cable and link, designers can have confidence that their systems are robust before deployment. The diagnostic data enables engineers to evaluate the health of their system over time and take action to avoid failures and down-time.

Cable diagnostic tools included in the DP83TD510E:

  • Time-Domain Reflectometry (TDR)
  • Active Link Cable Diagnostic (ALCD)
  • Signal Quality Indictor (SQI)
  • Loopback modes
  • Pseudo-random binary sequence (PRBS) generator and checker
  • IEEE 802.3cg PMA compliance test modes

The following sections will discuss each of these features or tools. Each section will provide background into the functionality of the PHY, instructions on how to configure each item, and procedure for how to analyze the data retrieved. Example scripts are included for each item, and can be used with the USB-2-MDIO software tool for easy evaluation.