ATM ChipWeb logo



New Chip



ATM Chip Database

  • Previous: PD98411 (NEASCOT-P40)
  • Up: List all categories

    Fujitsu (Fujitsu Microelectronics Europe ) : MB86676

    KeyStream - Access Controller

    The KeyStream? is a combined RISC and ATM SAR device with dedicated MPEG Transport Stream extraction and USB Interface. It is based around a high performance ARC microprocessor core running at 108MHz providing significant processing capability.

    The KeyStream? includes hardware support for ATM Adaptation Layer 5 (AAL5) with software based traffic management of CBR and UBR traffic classes. Transparent modes are also available for the support of other AALs in software (eg. AAL2). A Coprocessor Interface is provided to allow external data processing devices access to all KeyStream TM functions.

    The KeyStream? is ideally suited to a wide variety of applications, such as Home Gateway and Set Top Box, with tightly coupled integration to Fujitsu?s MB86670 KeyWave? ADSL Modem and MPEG2 Decoder devices.


    • ATM Adaptation Layer standard type 5 (AAL5)
    • Simultaneous segmentation and reassembly on up to 32 VCs
    • CBR and UBR traffic classes with software based traffic management compliant to TM4.1
    • Configurable 8 bit Utopia interface provides ATM connectivity (Utopia Level 1/2 master/slave)
    • High performance 32-bit embedded ARC microprocessor providing over 100 MIPs
    • 4k-byte dedicated load/store RAM and 8k-byte dedicated instruction cache
    • 4k-byte SRAM for general purpose data storage (eg. temporary packet buffer)
    • MPEG2 Transport Stream extraction from ATM connection including content based filtering and de-encapsulation
    • Delivery via an 8-bit MPEG Transport Stream interface to MPEG2 Decoder
    • Full speed USB Function interface for network connectivity requiring no external transceiver
    • Software based data transfer management with API for user program support
    • 32/16-bit SDRAM/Flash interface supports KeyWave? host control
    • 8/16-bit Coprocessor Interface to external master (eg. MPEG2 Decoder)
    • Up to 36 GPIO pins available (dependent on configuration)
    • Lightweight software operation for reduced component systems
    • JTAG compliant to IEEE1149.1
    • Fabricated in CMOS technology with 3.3 I/O, 2.5V core in a QFP208 package
    • -40C to +85C Industrial temperature range

    Information used to be available at: and

    Technology: CMOS
    Package: PQFP 208 Pin

    external WWW: Fujitsu Microelectronics Europe : web page used to be available at:

    external PDF: Fujitsu Microelectronics Europe : PDF documentation used to be available at:
    If you are the producer of this chip and want to correct/update the presented information, please feel free to register for direct database access.
ChipWeb Home

Last update: 14.11. 2009
Last link check: 01.03. 2006
All registered names and trademarks are the property of their respective owners.
No guarantee is given and no responsibility is taken for the information provided.
© 2024     Thomas Martin Knoll   Impressum   Datenschutz
back Kirche Reichenbach Vogtland