SNLU239A December   2018  – December 2023 DP83825I

 

  1.   1
  2.   DP83825EVM 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 LDO Supply
      3. 2.2.3 External Supply
      4. 2.2.4 EVM High Level Summary
  6. 3Configurations Options
    1. 3.1 Strap Options
  7. 4Software
    1. 4.1 MSP430 Driver
    2. 4.2 USB2MDIO Software
  8. 5Board Setup Details
    1. 5.1 Block Diagram
    2. 5.2 Schematics
  9. 6Bill of Materials
  10. 7Revision History

2.2.3 External Supply

DP83825EVM provides the option to power individual voltage rails from external power source giving customers more flexibility with EVM testing. ‘VDD3V3’, ‘VDDIO’, and ‘MSP-IO’ connectors shown above are used to switch individual rails from LDO source to External source. Connect jumper between pin 2-3 to switch from LDO supply to External power source. Then supply power through corresponding pin on J8.

Note: Jumpers in Figure 2-5 are in position 1-2. For external use, switch to position 2-3.
GUID-20231207-SS0I-B4G0-QG87-FNBG5ZJ62JBF-low.svg Figure 2-5 Supply Selection - LDO

For example: If VDD3V3 needs to be supplied externally, then switch the jumper on VDD3V3 connector from position 1-2 to 2-3. Then supply 3.3V external power through pin 5 on J8.