講演名 2003/5/9
Dynamic Access Control of Instruction Buses by Using Active Bits Detection for Low Power Systems
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抄録(和)
抄録(英) External buses consume substantial power for their high capacitances of bus lines and I/O pins. In this paper, we reduce redundant dynamic power consumption on instruction buses. For expressing a small number, we need the small number of bits (the minimum bits are defined as active bits). But all bit lines on an instruction bus change their status and redundant power is consumed. Suppressing switching activity of inactive bits, we can reduce redundant power consumption. Since the active bits are different each data, we reduce power by dynamic analysis and control of the instruction buses. An instruction is constructed of several fields which indicate kinds of operations, register numbers and an immediate value. After analyzing the characteristics of active bits in each field by profiling we change opcode and register assignments by using variable length coding to reduce active bits. We achieve more efficient power reduction by using active bits with the code assignment of instruction sets. Experimental results illustrate up to 29.1 % switching activity reduction for MPEG2.
キーワード(和)
キーワード(英) Low-Power / Instruction Bus / Active Bits / Dynamic Power
資料番号 VLD2003-9
発行日

研究会情報
研究会 VLD
開催期間 2003/5/9(から1日開催)
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開催地(英)
テーマ(和)
テーマ(英)
委員長氏名(和)
委員長氏名(英)
副委員長氏名(和)
副委員長氏名(英)
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講演論文情報詳細
申込み研究会 VLSI Design Technologies (VLD)
本文の言語 ENG
タイトル(和)
サブタイトル(和)
タイトル(英) Dynamic Access Control of Instruction Buses by Using Active Bits Detection for Low Power Systems
サブタイトル(和)
キーワード(1)(和/英) / Low-Power
第 1 著者 氏名(和/英) / Masanori Muroyama
第 1 著者 所属(和/英)
Department of Computer Science and Communication Engineering, Kyushu University
発表年月日 2003/5/9
資料番号 VLD2003-9
巻番号(vol) vol.103
号番号(no) 41
ページ範囲 pp.-
ページ数 6
発行日