The design of an asynchronous Tiny RISC TM/TR4101 microprocessor core

Kåre Tais Christensen, P. Jensen, P. Korger, Jens Sparsø

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    Abstract

    This paper presents the design of an asynchronous version of the TR4101 embedded microprocessor core developed by LSI Logic Inc. The asynchronous processor, called ARISC, was designed using the same CAD tools and the same standard cell library that was used to implement the TR4101. The paper reports on the design methodology, the architecture, the implementation, and the performance of the ARISC. This includes a comparison with the TR4101, and a detailed breakdown of the power consumption in the ARISC. ARISC is our first attempt at an asynchronous implementation and a number of simplifying decisions were made up front. Throughout the entire design we use four-phase handshaking in combination with a normally opaque latch controller. All logic is implemented using static logic standard cells. Despite this the ARISC performs surprisingly well: In 0.35 μm CMOS performance is 74-123 MIPS depending on the instruction mix, and at 74 MIPS the power efficiency is 635 MIPS/Watt
    Original languageEnglish
    Title of host publicationAdvanced Research in Asynchronous Circuits and Systems, 1998. Proceedings. 1998 Fourth International Symposium on
    PublisherIEEE
    Publication date1998
    Pages108-119
    ISBN (Print)0-8186-8392-9
    DOIs
    Publication statusPublished - 1998
    EventFourth International Symposium on Advanced Research in Asynchronous Circuits and Systems - San Diego
    Duration: 1 Jan 1998 → …

    Conference

    ConferenceFourth International Symposium on Advanced Research in Asynchronous Circuits and Systems
    CitySan Diego
    Period01/01/1998 → …

    Bibliographical note

    Copyright: 1998 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

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