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# 1.2.5.8.2 Using the Library

The user of this driver is the MPLAB Harmony TCP/IP Stack through its Ethernet MAC driver. This Ethernet PHY driver is not intended as a system wide driver that the application or other system modules may use. It is intended for the sole use of the MPLAB Harmony TCP/IP stack and implements the PHY driver required by the Ethernet MAC.

However, the user can have access to the PHY registers by using the MIIM Driver.

This topic describes the basic architecture and functionality of the Ethernet PHY driver and is meant for advanced users or TCP/IP Stack driver developers.