The KSZ8999 is an integrated 9-port 10/100 Switch with PHY and frame buffer. It contains eight 10/100 physical layer transceivers, nine MAC (Media Access Control) units with an integrated layer 2 switch. The device runs in two modes. The first mode is an eight port integrated switch and the second is as a nine port switch with the ninth port available through an MII (media independent interface). Useful configurations include a stand-alone eight port switch as well as an eight port switch with a routing element connected to the extra MII port. The additional port is also useful for a public network interfacing. The KS8999 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. On the media side, the KS8999 supports 10BaseT, 100BaseTX and 100BaseFX as specified by the IEEE 802.3 committee.
128kB of SRAM on chip for frame buffering
2.0Gbps High performance memory bandwidth
Wire speed reception and transmission
Integrated address look-up engine, supports 1K absolute MAC addresses
Automatic address learning, address aging and address migration
Supports port based VLAN
Proven transceiver technology for UTP and fibre operation
Supports for UTP or fibre on all 8-ports
Indicators for link, activity, full/half-duplex and speed
Individual port forced modes
Half-duplex back pressure flow control
Unmanaged operation via strapping or EEPROM at system reset time
