KSZ8999

MICROCHIP  KSZ8999  以太网控制器, 100 Mbps, IEEE 802.3, 2 V, 2.3 V, QFP, 208 引脚

The 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.

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128kB of SRAM on chip for frame buffering

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2.0Gbps High performance memory bandwidth

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Wire speed reception and transmission

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Integrated address look-up engine, supports 1K absolute MAC addresses

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Automatic address learning, address aging and address migration

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Supports port based VLAN

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Proven transceiver technology for UTP and fibre operation

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Supports for UTP or fibre on all 8-ports

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Indicators for link, activity, full/half-duplex and speed

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Individual port forced modes

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Half-duplex back pressure flow control

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Unmanaged operation via strapping or EEPROM at system reset time

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Comprehensive LED support