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KS8995M Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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KS8995M Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
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1 / 2 page  486 Mercury Drive, Sunnyvale, California 94086 Tel: (408) 735-1118 Fax: (408) 735-1119 www.kendin.com KS8995 – 5 Port 10/100 Switch with PHY Introduction The KS8995 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 KS8995 is designed to reside in an unmanaged design not requiring processor intervention. This is achieved through I/O strapping at system reset time On the media side, the KS8995 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. Highlights • 5 port 10/100 Integrated Switch with Physical Layer Transceivers • SRAM on chip for frame buffering • 1.4Gbps high performance memory bandwidth • 10BaseT, 100BaseTX and 100BaseFX modes of operation • Superior analog technology for reduced power and die size • Single 2.5 V power supply • 500 mA (1.25 W) including physical transmit drivers • 128 pin PQFP package • Support for UTP or fiber installations • Indicators for link, activity, full / half duplex and speed • Unmanaged operation via strapping at system reset time • Hardware based 10/100, full/half, flow control and auto negotiation • Individual port forced modes (full duplex, 100BaseTX) when auto negotiation is disabled • Wire speed reception and transmission • Integrated address Look-Up Engine, supports 1K absolute MAC addresses • Automatic address learning, address aging and address migration • Broadcast storm protection • Full duplex IEEE 802.3x flow control • Half duplex back pressure flow control • Comprehensive LED support • External MAC interface (MII or SNI) for router applications Physical Transceiver 1 MAC 1 Look Up Engine (1K Entries) SRAM Buffers MII / SNI (exclusive) External Interface Physical Transceiver 2 MAC 2 Physical Transceiver 3 MAC 3 Physical Transceiver 4 MAC 4 Physical Transceiver 5 MAC 5 FIFO and Flow Control Queue Management Buffer Management LED and Programming Interface MRXD[3:0] MRXDV MCOL MTXD[3:0] MTXEN MTXER MII_CLK LED[1][3:0] LED[2][3:0] LED[3][3:0] LED[4][3:0] LED[5][3:0] MRXD[0] MRXDV MCOL MTXD[0] MTXEN MII_CLK S N I M I I |
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