SNLA438 September   2023 DP83822H , DP83822HF , DP83822I , DP83822IF , DP83826E , DP83826I , DP83867CS , DP83867E , DP83867IS , DP83869HM

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2PROFINET Specification Requirements
  6. 3Ethernet PHY Setup
    1. 3.1 DP83822
      1. 3.1.1 DP83822 Hardware Bootstrap Configurations
      2. 3.1.2 DP83822 Register Configuration
    2. 3.2 DP83826
      1. 3.2.1 DP83826 Hardware Bootstrap Configuration
      2. 3.2.2 DP83826 Register Configuration
    3. 3.3 DP83867
      1. 3.3.1 DP83867 Hardware Bootstrap Configurations
      2. 3.3.2 DP83867 Register Configuration
    4. 3.4 DP83869
      1. 3.4.1 DP83869 Hardware Bootstrap Configurations
      2. 3.4.2 DP83869 Register Configuration
  7. 4Summary
  8. 5References

3.3.2 DP83867 Register Configuration

If hardware bootstraps are not sufficient, our Ethernet PHYs can be configured via Register Writes, which can change the PHYs mode, regardless of how the Bootstraps are configured.

Table 3-7 DP83867 Software Configuration
Register Address Write Value Remarks
0000 1140

Auto-negotiation enabled,

Full Duplex Mode,

For Forced 100Mbps write 2100

For Forced 1000Mbps write 2140, Note: Not recommended
0004 0181 De-advertise 10Base-Te
0009 0200 De-advertise Half-Duplex for 1000Base-T
0010 5048

SGMII disabled

Auto MDI-X enable

002D 401F

FLD Enable

Last nibble F sets Fast Link Drop Functionality

Details can be found in Data Sheet, search for 0x002D
0032 00D3

RGMII Enable
001F 4000 Soft Reset PHY