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Research on Low Power Techniques of the Instruction Fetching Unit in Embedded Processors

Author: GaoJinJia
Tutor: WangWeiWei;MengJianZuo;ChenZhiJian
School: Zhejiang University
Course: Circuits and Systems
Keywords: Fetch unit Low power consumption Instruction cache Branch target cache Road forecast Loop filter Branch Trail
CLC: TP332
Type: Master's thesis
Year: 2012
Downloads: 26
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The low-power embedded processor research direction , and the fetch unit contains a large number of memory accesses , power consumption has become an important part of the whole processor power . This paper focuses on the embedded processor fetch unit of the key components of low -power technology . The application of these innovative technologies enables an embedded CPU , effectively reducing the fetch unit dynamic power consumption on the basis of maintaining processor performance . The main content of this paper and innovations include : a to predict cache low power , road link relations based on the command history . In this paper, a branch target buffer ( BTB) complex with two jumps and jump historical links between table way prediction architecture , a very low cost hardware to solve the conflict of the branch target instruction where improved jump turn pre - forecast accuracy to take the road , thus effectively reducing the dynamic power of instruction Cache . 2 branch target cache -based access to the body of the loop filter low-power technology . BTB access for the body of the loop instruction redundant power consumption issues , the paper proposes a circular access filtering mechanism to eliminate the body of the loop in sequential instruction instruction stream BTB invalid access ; further proposed a branch tracking method for compensation due to loop filter mechanism of Sino-African cycle class of the loop body branch instruction error filter caused the loss of performance . Both technologies protect the processor performance based on reducing the dynamic power consumption of the BTB . In this paper, the low-power technology is designed to be simple , low-cost hardware , embedded processor fetch unit low-power design is of positive significance .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Electronic digital computer (not a continuous role in computer ) > Arithmetic unit and the controller (CPU)
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