A simple clockless Network-on-Chip for a commercial audio DSP chip

Mikkel Bystrup Stensgaard, Tobias Bjerregaard, Jens Sparsø, Johnny Halkjær Pedersen

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    Abstract

    We design a very small, packet-switched, clockless Network-on-Chip (NoC) as a replacement for the existing crossbar-based communication infrastructure in a commercial audio DSP chip. Both solutions are laid out in a 0.18 um process, and compared in terms of area, power consumption and routing complexity. Even though the NoC turns out to be larger and more power consuming than the existing crossbar implementation, it still accounts for less than 1% of the total chip area and power consumption, and is justified by a long list of advantages: The NoC is modular, scalable, and in contrast to the existing crossbar, it allows all blocks to communicate. The total wire length is decreased by 22% which eases the layout process and makes the design less prone to routing congestion. Not least, the communicating blocks are decoupled by means of the NoC, providing a Globally-Asynchronous, Locally-Synchronous (GALS) system where independent clocking of the individual blocks is enabled. This study shows that NoCs are feasible even for small systems.
    Original languageEnglish
    Title of host publicationEuromicro Conference on Digital System Design: Architectures, Methods and Tools
    PublisherIEEE
    Publication date2006
    ISBN (Print)0-7695-2609-8
    DOIs
    Publication statusPublished - 2006
    Event9th Euromicro Conference on Digital System Design: Architectures, Methods and Tools - Dubrovnik, Croatia
    Duration: 30 Aug 20061 Sep 2006
    Conference number: 9

    Conference

    Conference9th Euromicro Conference on Digital System Design
    Number9
    CountryCroatia
    CityDubrovnik
    Period30/08/200601/09/2006

    Bibliographical note

    Copyright: 2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

    Keywords

    • application
    • asynchronous
    • System-on-Chip
    • on-chip network
    • Network-on-Chip
    • clockless

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