SNLU357 April   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Power Requirements
    2. 2.2 Setup
    3. 2.3 Interfaces
  9. 3Software
    1. 3.1 Software Description
    2. 3.2 Software Installation
    3. 3.3 Programming Options
  10. 4Implementation Results
    1. 4.1 Performance Data and Results
  11. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  12. 6Additional Information
    1. 6.1 Known Hardware or Software Issues
    2. 6.2 Trademarks
    3. 6.3 Terminology
  13. 7Related Documentation
    1. 7.1 Supplemental Content
  14. 8References

6.1 Known Hardware or Software Issues

In Rev A of the DP83826A EVM (HSDC203A) there is a known issue with USB-2-MDIO register access when powering the board over USB only. If powering this EVM with USB only, the MDIO interface can become unstable. This is because the USB VBUS is unable to power the on board MDIO/MDC MUXes U7 and U9. TI recommends powering the board with an external supply if register access is needed.