Part Number: KS8993
Description: 3-Port 10/100 Integrated Switch with PHY and Frame Buffer
Package: 128-Pin PQFP type
Manufacturer: Micrel Semiconductor
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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.
Pinout
Features
1. 3-port 10/100 integrated switch with physical layer transceivers
2. 64k Byte of SRAM on chip for frame buffering
3. 1.0Gbps high performance memory bandwidth
4. 10BaseT, 100BaseTX and 100BaseFX modes of operation
5. Support for UTP or fiber installations
6. Superior analog technology for reduced power and die size
7. Supports port based VLAN
8. QoS feature!! Supports 802.1p based priority or portbased priority
9. Indicators for link, activity, full/half-duplex and speed
10. Unmanaged operation via strapping at system reset time
