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Technical content

Revision 1.07 CENTAUR Integrated Multi-Port Gateway Solutions The KS8695 “Multi-Port Gateway-on-a-Chip” delivers a new level of networking integration and performance for speeding broadband gateway development. The key components integrated in the KS8695 include:

  • Integrated layer-2 managed switch with five Fast Ethernet transceivers and patented mixed-signal low-power technology; five 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 4 ports for LAN access.
  • A 185-MIPS ARM 922T processor with memory management unit (MMU) and 8kB I-cache and 8kB D-cache.
  • An independent MAC unit supporting MAC or PHY mode MII interface for networking expansion. Block Diagram
  • On checksum errors and TCP/UDP/IP packet header checksum generation. The protocol engine applies to the WAN, LAN and EMAC interfaces.
  • DMA engines with burst mode support; Tx and Rx FIFOs to streamline the data transfers between WAN and CPU, CPU and LAN, CPU and EMAC.
  • 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 & software reference designs are available. The KS8695 represents a new level of total solution optimized for broadband gateway system development and renders speedy routing performance & connectivity interfaces for value-added networking expansions. XceleRouter is a trademark of Micrel, Inc. ARM is a registered trademark of ARM Limited.

Features

  • The CENTAUR KS8695 featuring XceleRouter™ Technology, is a single-chip Multi-Port Gateway-on-a- Chip with all the key components integrated for a high- performance and low-cost broadband gateway
  • ARM922T high-performance CPU core - 185 MIPS ARM922T core at 166MHz - 8kB I-cache and 8kB D-cache - Memory Management Unit (MMU) for Linux - 32-bit ARM and 16-bit Thumb instruction sets
  • XceleRouter™ Technology - TCP/UDP/IP packet header checksum generation to offload CPU tasks - IPv4 packet filtering on checksum errors - Automatic error packet discard
  • Integrated switch engine & transceivers: - Five 10/100 transceivers and MACs (1P for WAN interface, 4P for LAN switching) - 100Base-Tx, 10Base-T and 100Base-Fx modes (Fx in 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 - Dedicated 1K-entry look-up engine - Automatic MDI/MDIX 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 & external I/O - Total memory space up to 64MB - Intel/AMD-type flash support
  • WAN/LAN/EMAC DMA Engines & FIFO - DMA engine with burst mode support for efficient WAN, LAN and EMAC data transfers - FIFOs for back-to-back packet transfers
  • Peripheral Support - One MII interface (MAC or PHY mode) - 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 - 208-pin PQFP package - 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, software stacks - Documentation for design & programming

Applications

  • Multi-port broadband gateway
  • Multi-port firewall & VPN appliances
  • Combo wireless and wireline gateway
  • Multi-port V oIP gateway
  • Fiber-to-the-Home managed CPE

Peripheral Options and Examples

STOCK NO. M1000-090303 Contact Micrel Semiconductor Location Address Telephone Fax Corporate HQ 1849 Fortune Drive San Jose, CA 95131 USA +1 (408) 944-0800 +1-408-944-0970 Eastern USA 93 Branch Street Medford, NJ 08055 USA +1 (609) 654-0078 +1 (609) 546-0989 Southeast USA 8105 Bluffridge Drive Raleigh, NC 27615 USA +1 (919) 870-7650 +1 (919) 870-7651 Central USA 722 S. Denton Tap Suite 130 Coppell, TX 75019 USA +1 (972) 393-2533 +1 (972) 393-2540 Western USA 2180 Fortune Drive San Jose, CA 95131 USA +1 (408) 944-0800 +1-408-944-0970 Northwest USA 401 NE Ravenna Blvd. Box 152 Seattle, W A 98115 USA +1 (206) 526-7299 +1 (206) 526-8829 Southwest USA 7545 Irvine Center Dr. Suite 200 Irvine, CA 92618 USA +1 (949) 623-8343 +1 (949) 623-8305 Korea 4F, KTB Building, 826-14, Yeoksam-dong, Kangnam-ku Seoul 135-080 Korea +82 (2) 3466-3000 +82 (2) 3466-2999 China 12A, XingHao City Garden Shenzhen, P.R. China +86 (755) 2693-4601 Japan 1-16-15 Dogenzaka, Shibuyaku Tokyo 150-0043 Japan +81 (3) 5428-0871 +81 (3) 5428-0872 Europe 1st Floor, 3 Lockside Place, Mill Lane Newbury, Berks RG14 5QS UK +44 1635 524455 +44 1635 524466 Western Europe 10, avenue du Quebec, Villebon BP116 Courtaboeuf Cedex 91944 France +33 (0) 1 6092 4189 +33 (0) 6 0868 4489