KS8993

KS8993 Micrel KS8993 3-Port 10/100 Integrated Switch with PHY and Frame Buffer Rev. 2.06 General Description The KS8993 contains three 10/100 physical layer transceivers, three MAC (Media Access Control) units with an integrated layer 2 switch. The device runs in two modes. The first mode is a three port integrated switch and the second is as a three port switch with the third port decoupled from the physical port. In this mode access to the third MAC is provided using a reverse or forward MII (Media Independent Interface) such that an external MAC can be directly connected to the KS8993. This interface also supports the 7-wire (serial network interface) as used by some routing devices. Useful configurations include a stand alone three port switch as well as a two port switch with a routing element connected to the extra MII port. The additional port is also useful for public network interfacing. The KS8993 has rich features such as VLAN and priority queuing and is designed to resid...