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Virtual I/O Based on ScratchPad Memory for Embedded System

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6 Author(s)
Binbin Wu ; Coll. of Comput. Sci., Zhejiang Univ., Hangzhou, China ; Xiangsheng Tang ; Hui Yuan ; Qingsong Shi
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Scratchpad memory (SPM) is software-controlled on-chip SRAM memory and widely used in embedded processors to meet the strict requirements on performance, energy consumption and real-time response of embedded systems. This paper proposes an SPM based I/O approach, called Virtual I/O based on SPM (SPMIO), to accelerate the I/O access time efficiently through SPM. Different I/O requests are buffered and scheduled on SPM through SPMIO with the help of ScratchPad Memory Operating System (SPMOS). SPMIO will provide the direct datapath to CPU for I/O accesses, reduce delays and lower the power consumption. The experimental results show that SPMIO is efficient and practical.

Published in:

Computer and Information Technology (CIT), 2010 IEEE 10th International Conference on

Date of Conference:

June 29 2010-July 1 2010