RTL8881AMdatasheet5.1.PACKAGEIDENTIFICATION...........................................................................................................................................66.PINDESCRIPTIONS.........................................................................................................................................................66.1.CONFIGURATIONUPONPOWERONSTRAPPING...........................................................................................................96.2.SHAREDI/OPINMAPPING(DRQFN-164).................................................................................................................116.3.GMACPINMODEDESCRIPTION...............................................................................................................................136.3.1.MACInterfaceMII/GMII/RGMIIModePinSharingMappings..........................................................................136.3.2.GMII/RGMIIInterfacePinDescriptions..............................................................................................................136.3.3.MIIMACModeInterfacePinDescriptions.........................................................................................................146.3.4.MIIPHYModeInterfacePinDescriptions..........................................................................................................147.MEMORYCONTROLLER............................................................................................................................................157.1.SDRDRAMCONTROLINTERFACE...........................................................................................................................157.1.1.Features................................................................................................................................................................157.1.2.Bank2andBank3.........................................