SNLU262A december   2019  – june 2023 DP83826I

 

  1.   1
  2.   DP83826EVM User’s Guide
  3.   Trademarks
  4. 1Definitions
  5. 2Introduction
    1. 2.1 Key Features
    2. 2.2 Operation – Quick Setup
      1. 2.2.1 Power Supply
      2. 2.2.2 Power Inputs
      3. 2.2.3 Software
        1. 2.2.3.1 MSP430 Driver
        2. 2.2.3.2 USB-2-MDIO Software
  6. 3Board Setup Details
    1. 3.1 Block Diagram
    2. 3.2 EVM High Level Summary
  7. 4Configurations Options
    1. 4.1 MDIO Register Access
  8. 5EMI Results
    1. 5.1 Setup
    2. 5.2 Results
  9. 6DP83826EVM Schematics
  10. 7DP83826EVM BOM
  11. 8Revision History

2.2.2 Power Inputs

GUID-4D5BA4BD-C13C-47F7-A75B-2E9E6B23AC0A-low.pngFigure 2-4 DP83826EVM Power Inputs

In the case the user would like to power the EVM from external sources, J7, J8, and J9, VDDA, VDDIO and the fiber optic transceivers respectively, can be removed and supplied power at pin 2 for all three jumpers. J23 (5V jumper) is used to supply LDO and PHY using an external 5V power supply. MSP is powered through USB.

DP83826EVM USB Power Input

GUID-2E4B6CC5-1D67-4226-97F3-1F26D6F617FE-low.png

Remove the J23 jumper (5V jumper) and connect the right hand side pin to USB_VBUS using two female connector. After connection, PHY and MSP can be power up through USB without any external power supply required.