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12 years agoDP83848C is the phy which makes the interface between the MAC and the Ethernet wire.
The phy configuration can be done with pin strapping (i.e. the level of a few pins at reset time defines how the devices will operate) or through the 2-wire mdio interface. Since the TSE MAC (like most MACs) does have a mdio port available for these purpose, this is the usual choice. In the HAL driver you also find the functions to directly access PHY configuration registers, without bothering with the mdio protocol. If you don't have a reference design and sample code for the DP83848, you must refer to the device datasheet in order to know which registers you need to program to enable ethernet communication.