The RTL8309M-CG is a 9-port 10/100M Ethernet switch controller that integrates memory, nine MACs,
and eight physical layer transceivers for 10Base-T and 100Base-TX operation into a single chip. It
supports a (T)MII/RMII interface for external devices to connect to the 9th MAC. The external device
could be a routing engine, HomePNA, HomePlug, or VDSL transceiver depending on the application. In
order to accomplish diagnostics in complex network systems, the RTL8309M provides a loopback feature
in each port.
