Datasheet

DescriptionResetTypeNameBit/Field
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0x0ROreserved23:16
MAC Address2 [47:32]
This field contains the upper 16 bits [47:32] of the third 6-byte MAC
address.
0xFFFFRWADDRHI15:0
December 13, 20131698
Texas Instruments-Advance Information
Ethernet Controller