KS8999 Integrated 9-Port 10/100 Switch with PHY and Frame Buffer Rev 1.14 This is achieved through I/O strapping or EEPROM General Description programming at system reset time. On the media side, The KS8999 contains eight 10/100 physical layer the KS8999 supports 10BaseT, 100BaseTX and transceivers, nine MAC (Media Access Control) units 100BaseFX as specified by the IEEE 802.3 committee. with an integrated layer 2 switch. The device runs in two Physical signal transmission and reception are modes. The first mode is an eight port integrated switch enhanced through use of analog circuitry that makes the and the second is as a nine port switch with the ninth design more efficient and allows for lower power port available through an MII (Media Independent consumption and smaller chip die size. Interface). Useful configurations include a stand alone eight port switch as well as a eight port switch with a Data sheets and support documentation can be found routing element connected to the extra MII port. The on Micrels web site at www.micrel.com. additional port is also useful for a public network interfacing. The KS8999 is designed to reside in an unmanaged design not requiring processor intervention. Functional Diagram Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. KS8999 Supports both commercial and industry Features temperature 9 port (8+1) 10/100 integrated switch with eight Commercial temperature range: 0C to +70C physical layer transceivers and one MII/SNI (KS8999) interface Industrial temperature range: 40C to +85C Advanced Ethernet Switch with internal frame (KS8999I) buffer Supports lead free products: 128K Byte of SRAM on chip for frame Commercial temperature range: 0C to +70C buffering (KSZ8999) 2.0Gbps high performance memory Industrial temperature range: 40C to +85C bandwidth (KSZ8999I) Wire speed reception and transmission Available in 208-pin PQFP package Integrated address look-up engine, supports 1K absolute MAC addresses Automatic address learning, address aging Ordering Information and address migration Part Number Temp Range Package Advanced Switch Features KS8999 0C to +70C 208-Pin PQFP Supports 802.1p priority and port based priority KS8999I 40C to +85C 208-Pin PQFP Supports port based VLAN KSZ8999 0C to +70C 208-Pin PQFP Supports 1536 byte frame for VLAN tag Supports DiffServ priority, 802.1p based KSZ8999I 40C to +85C 208-Pin PQFP priority or port based priority o broadcast storm protection Proven transceiver technology for UTP and fiber operation 10BaseT, 100BaseTX and 100BaseFX modes of operation Supports for UTP or fiber on all 8-ports Indicators for link, activity, full/half-duplex and speed Hardware based 10/100, full/half, flow control and auto-negotiation Individual port forced modes (full duplex, 100BaseTX) when auto-negotiation is disabled Full-duplex IEEE 802.3x flow control Half-duplex back pressure flow control Supports MDI/MDI-X auto crossover External MAC interface (MII or 7-wire) for router applications Unmanaged operation via strapping or EEPROM at system reset time (see Reset Reference Circuit section) Comprehensive LED support Single 2.0V power supply with options for 2.5V and 3.3V I/O 900 mA (1.80W) including physical transmit drivers January 2005 2 KS8999