SNLA438 September 2023 DP83822H , DP83822HF , DP83822I , DP83822IF , DP83826E , DP83826I , DP83867CS , DP83867E , DP83867IS , DP83869HM
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.
Register Address | Write Value | Remarks |
---|---|---|
0000 | 3100 | Auto-negotiation enabled, Full Duplex Mode. For Forced 100Mbps write 2100 |
0004 | 0101 | De-advertise 10Base-T and Half Duplex modes |
000B | 000F |
FLD Enabled Last nibble F sets Fast Link Drop Functionality Details can be found in Data Sheet, search for "Offset = Bh" |
0017 | 0041 | This is the default state, Enable MII mode of Operation. For RMII, write 0061 |
0019 | 8000 | This is the default state, Auto MDI/X enable. For forced MDI or MDIX, write 0000 or 4000 respectively |
001F | 4000 | Soft Reset PHY |