SPRUJG5 January   2025

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1.     Preface: Read This First
      1. 1.1.1 If You Need Assistance
    2. 1.1 Introduction
    3. 1.2 Kit Contents
    4. 1.3 Device Information
  6. 2Hardware
    1. 2.1 Component Identification
    2. 2.2 Power Requirements
      1. 2.2.1 Power Tree
    3. 2.3 Functional Block Diagram
    4. 2.4 Header Information
    5. 2.5 Test Points
    6. 2.6 Interfaces
      1. 2.6.1 Ethernet Interface
        1. 2.6.1.1 Industrial Ethernet PHY
        2. 2.6.1.2 Industrial Ethernet PHY Strapping Resistors
        3. 2.6.1.3 LED Indication in RJ45 Connector
        4. 2.6.1.4 Multi-Connector Addressing
    7. 2.7 Integration Guide
      1. 2.7.1 Board Dimensions
      2. 2.7.2 Installation
  7. 3Hardware Design Files
  8. 4Additional Information
    1. 4.1 Trademarks
  9. 5References
    1. 5.1 Reference Documents
  10. 6Revision History

2.6.1.2 Industrial Ethernet PHY Strapping Resistors

The Ethernet PHY uses many functional pins as strap option to place the device into specific modes of operation.

Note: The DP83867-EVM-AM is designed for a VDDIO voltage of 3.3V. If these board is connected to a 1.8V VDDIO system then the strapping resistors will need to be updated. For complete details on the strapping resistor modes, refer to the 4-Level Strap Resistor Ratios table within the DP83867IR Data Sheet.
AUDIO-AM275-EVM AUDIO-AM62D-EVM Industrial Ethernet PHY Strapping Resistors Figure 2-6 Industrial Ethernet PHY Strapping Resistors
Table 2-3 Industrial 10/100/1000 Mbit Ethernet PHY Strapping Resistors
Functional Pin Mode on DP83867-EVM-AM Function
RX_D0 EEPROM_A0 PHY address: 0[EEPROM_A2][EEPROM_A0]. See Section 2.6.1.4 for more information on PHY addressing.
RX_D2 EEPROM_A2
RX_DV/RX_CTRL 3 Auto negotiation enabled
LED_1 1 Clock Skew TX[2] = 2 ns
Advertise ability of 10/100/1000 Mbps
LED_2 1 Clock Skew TX[1] = 2 ns
Clock Skew TX[0] = 2 ns
GPIO0 1 Clock Skew RX[0] = 2 ns
GPIO1 1 Clock Skew RX[2] = 2 ns
Clock Skew RX[1] = 2 ns