The RTL8324E is Layer 2 24-port 10/100M switch controllers that integrate 24
MACs and 16 physical layer transceivers for 100Base-TX and 10Base-T operation.
The RTL8324E supports one XSMII (Eight Serial Media Independent Interface), which can be connected to an Octal PHY RTL8208D to provide a convenient solution for a 24-port Fast Ethernet switch
Half duplex: Back pressure flow control
Full duplex: IEEE 802.3x flow control