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