SNLU353 October   2024 DP83867CR , DP83867CS , DP83867E , DP83867IR , DP83867IS , DP83869HM

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Specification
    3. 1.3 Device Information
  7. 2Evaluation Tutorial
    1. 2.1 How to Set Up the EVM
    2. 2.2 EVM Evaluation
  8. 3Hardware
    1. 3.1 Separate Power Rail
    2. 3.2 Status LEDs
    3. 3.3 MDC/MDIO Headers
    4. 3.4 MDC/MDIO Level Shifters
    5. 3.5 Manual Reset
  9. 4Software
    1. 4.1 GUI Installation
  10. 5Hardware Design Files
    1. 5.1 Schematics
  11. 6Additional Information
    1. 6.1 Trademarks

3.2 Status LEDs

The ASPEED Ethernet PHY EVM contains many supply voltages levels (1.0V, 1.1V, 1.8V, 2.5V) for each PHY. Make sure that the on-board LDOs are functioning properly and outputting the necessary supply voltages, the user can refer to the circled LEDs below on the bottom right of the EVM. D703 will illuminate for an active 1.1V, D704 for an active 1.0V and D705 for an active 1.8V.

DP83867 DP83869 Power Status LEDs Figure 3-2 Power Status LEDs

Each PHY also contains link status and link activity LEDs. The link status LEDs are active when a link is established and the link activity LEDs are active when there is any receive or transmit activity. The link status and link activity LEDs for the DP83867 with VDDIO = 1.8V is shown below (the silkscreen designators are D302 and D303).

DP83867 DP83869 Link Status LEDs for DP83867 with VDDIO = 1.8V Figure 3-3 Link Status LEDs for DP83867 with VDDIO = 1.8V