KS8995E

The KS8995E contains five 10/100 physical layer transceivers, five MAC (Media Access Control) units with an integrated layer 2 switch. The device runs in two modes. The first mode is a five port integrated switch and the second is as a five port switch with the fifth port decoupled from the physical port. In this mode access to the fifth MAC is provided using a MII (Media Independent Interface).

Useful configurations include a stand alone five port switch as well as a four port switch with a routing element connected to the extra MII port. The additional port is also useful for public network interfacing.

The KS8995E is designed to reside in an unmanaged design not requiring processor intervention. This is achieved through I/O strapping or EEPROM programming at system reset time. Block Diagram On the media side, the KS8995E supports 10BaseT, 100BaseTX and 100BaseFX as specified by the IEEE 802.3 committee.

Physical signal transmission and reception are enhanced through use of analog circuitry that makes the design more efficient and allows for lower power consumption and smaller chip die size.

The major enhancements from the KS8995 to the KS8995E are support for VLAN, traffic priority queuing, EEPROM programming for expanded control and MDI/ MDI-X auto crossover.