This document summarizes the hardware pin and software register differences for migrating from an existing board design using the KSZ9021RN PHY to a new board design using the KSZ9031RNX PHY.
This document summarizes the hardware pin and software register differences for migrating from an existing board design using the KSZ9021RN PHY to a new board design using the KSZ9031RNX PHY. It highlights key attribute differences such as RGMII versions, voltage options, and support for Energy Efficient Ethernet and Wake-on-LAN features.
| RGMII Version 1.3 | power-up default using off-chip data-to-clock delays |
|---|---|
| RGMII Version 2.0 | power-up default using on-chip data-to-clock delays |
| AVDDH Voltage (KSZ9021RN) | 3.3V only |
| AVDDH Voltage (KSZ9031RNX) | 3.3V or 2.5V (commercial temperature only) |
| DVDDH Voltage (KSZ9031RNX) | 3.3V, 2.5V or 1.8V |
| Energy-Detect Power-Down Mode | Supported for KSZ9031RNX |
KSZ9021RN defaults to RGMII Version 1.3 with off-chip delays, while KSZ9031RNX defaults to RGMII Version 2.0 with on-chip delays.
No, Wake-on-LAN is not supported on the KSZ9021RN but is supported on the KSZ9031RNX.
No, there is no strapping pin difference between the KSZ9021RN and KSZ9031RNX.