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