General Description

The KS8995X is a highly integrated Layer-2 QoS (Quality of Service) switch with optimized BOM (Bill of Materials) cost for low port count, cost-sensitive 10/100Mbps switch systems. It also provides an extensive feature set including three different QoS priority schemes, a dual MII interface for BOM cost reduction, rate limiting to offload CPU tasks, software and hardware power-down, a MDC/MDIO control interface and port mirroring/monitoring to effectively address both current and emerging Fast Ethernet applications.

Features

• Integrated switch with five MACs and five Fast Ethernet transceivers fully compliant to IEEE 802.3u standard

• Shared memory based switch fabric with fully nonblocking configuration

• 10BaseT, 100BaseTX and 100BaseFX modes (FX in Ports 4 and 5)

• Dual MII configuration: MII-Switch (MAC or PHY mode MII) and MII-P5 (PHY mode MII)

• VLAN ID tag/untag options, per-port basis

• Enable/disable option for huge frame size up to 1916 bytes per frame

• Broadcast storm protection with percent control – global and per-port basis

• Optimization for fiber-to-copper media conversion

• Full-chip hardware power-down support (register configuration not saved)

• Per-port-based software power-save on PHY (idle link detection, register configuration preserved)

• QoS/CoS packets prioritization supports: per port, 802.1p and DiffServ based

• 802.1p/q tag insertion or removal on a per-port basis (egress)

• Port-based VLAN support

• MDC and MDI/O interface support to access the MII PHY control registers (not all control registers)

• MII local loopback support

• On-chip 64Kbyte memory for frame buffering (not shared with 1K unicast address table)

• 1.4Gbps high-performance memory bandwidth

• Wire-speed reception and transmission

• Integrated look-up engine with dedicated 1K unicast MAC addresses

• Automatic address learning, address aging and address migration

• Full-duplex IEEE 802.3x and half-duplex back pressure flow control

• Comprehensive LED support

• 7-wire SNI support for legacy MAC interface

• Automatic MDI/MDI-X crossover for plug-and-play

• Disable automatic MDI/MDIX option

• Low power Core: 1.8V I/O: 2.5 or 3.3V

• 0.18µm CMOS technology

• Commercial temperature range: 0°C to +70°C

• Available in 128-pin PQFP package

Applications

• Broadband gateway/firewall/VPN

• Integrated DSL or cable modem multi-port router

• Wireless LAN access point plus gateway

• Home networking expansion

• Standalone 10/100 switch

• Hotel/campus/MxU gateway

• Enterprise VoIP gateway/phone

• FTTx customer premise equipment

• Media converter