General Description
The CENTAUR KS8695X, Multi-Port Gateway-on-a-Chip, delivers a new level of networking integration and performance for accelerating broadband gateway development. Key components integrated in the KS8695X include:
• Integrated Layer 2 managed switch with five Fast Ethernet transceivers and patented mixed-signal low power technology, five media access control (MAC) units, a high-speed non-blocking switch fabric, a dedicated address look-up engine, an on-chip frame buffer memory, and LED controls. One port is partitioned for WAN interface with the other four ports for LAN access.
• A 166MHz ARM™ (ARM992T) processor with memory management unit (MMU) and 8KB I-cache and 8KB D cache.
• XceleRouter™ technology for the WAN and LAN interfaces.
• Shared programmable 8/16/32-bit data bus and 22-bit address bus with up to 64MB total memory space for SDRAM, ROM, Flash, SRAM, and all peripheral devices.
• Other peripheral support logic including GPIO, a watchdog timer, an interrupt controller, and a JTAG debugging interface. Complete hardware and software reference designs are available.
The KS8695X represents a new level of total solution optimized for broadband gateway system development and renders speedy routing performance and connectivity interfaces for value-added networking expansions.
Features
•The CENTAUR KS8695X featuring XceleRouter tech nology is a single-chip multi-port gateway-on-a-chip with all the key components integrated for a high-perfor mance and low-cost broadband gateway.
• ARM922T High-Performance CPU Core
– ARM922T core at 166MHz
– 8KB I-cache and 8KB D-cache
– Memory management unit (MMU) for Linux and WinCE®
– 32-bit ARM and 16-bit thumb instruction sets for smaller memory footprints
• XceleRouter Technology
– TCP/UDP/IP packet header checksum generation to offload CPU tasks
– IPv4 packet filtering on checksum errors
– Automatic error packet discard
• Integrated Ethernet Transceivers and Switch Engine
– Five 10/100 transceivers and five MACs (1P for WAN interface, 4P for LAN switching)
– 10BASE-T, 100BASE-TX, and 100BASE-FX modes (FX on the WAN port)
– On-chip SRAM as frame buffer memory
– Wire-speed switching
– VLAN ID and 802.1p tag/untag options
– Extensive MIB counter management support
– IGMP snooping for multicast packet filtering
– Port-based VLAN
– QoS/CoS packet prioritization support: per port, 802.1p and DiffServ-based
– 802.1D Spanning Tree Protocol support
– Dedicated 1K entry look-up engine
– Automatic MDI/MDI-X crossover on all ports
– Port mirroring/monitoring/sniffing
– Broadcast storm protection with % control
– Full- and half-duplex flow control
• Memory and External I/O Interfaces
– 8/16/32-bit wide shared data path for SDRAM, ROM/SRAM/Flash and external I/O
– Total memory space up to 64MB
– Intel®/AMD®
-type Flash support
• WAN and LAN DMA Engines and FIFO
– DMA engine with burst mode support for efficient WAN and LAN data transfers
– FIFOs for back-to-back packet transfers
• Peripheral Support
– 8/16/32-bit external I/O interface supporting PCMCIA or generic CPU/DSP host I/F
– Eight general-purpose input/output (GPIO)
– Two 32-bit timer counters (one watchdog)
– Interrupt controller
– ARM922T JTAG debug interface
• Power Management
– Reduced CPU and system clock speeds
• System Design
– Up to 166MHz CPU and 125MHz bus speed
• Reference HW/SW Evaluation Kit
– Hardware evaluation board (passes class B EMI)
– Board support package including firmware source codes, linux kernel, and software stacks
– Documentation for design and programming
• Commercial Temperature Range: 0°C to +70°C
• Available in 208-Pin PQFP
Applications
• Multi-port broadband gateway
• Multi-port firewall and VPN appliances
• Combination wireless and wireline gateway
• Multi-port VoIP gateway
• Fiber-to-the-home managed CPE
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