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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク NOR flash replacement ： ウィキペディア英語版 NOR flash replacement While flash memory remains one of the most popular storages in embedded systems because of its non-volatility, shock-resistance, small size, and low energy consumption, its application has grown much beyond its original design. Based on its original design, NOR flash memory is designed to store binary code of programs because it supports XIP (eXecute-In-Place) and high performance in read operations, while NAND flash memory is used as a data storage because of its lower price and higher performance in write/erase operations, compared to NOR flash. In recent years, the price of NAND flash has gone down much faster than that of NOR flash. Thus, to reduce the hardware cost ultimately, using NAND flash to replace NOR flash (motivated by a strong market demand) becomes a new trend in embedded-system designs, especially on mobile phones and arcade games. == Overview == The replacement depends on well-designed management of flash memory, which is carried out by either software on a host system (as a raw medium) or hardware circuits/firmware inside its devices. Here, an efficient prediction mechanism with limited memory-space requirements and an efficient implementation is proposed. The prediction mechanism collects the access patterns of program execution to construct a prediction graph by adopting the working set concept. According to the prediction graph, the prediction mechanism prefetches data (/code) to the SRAM cache, so as to reduce the cache miss rate. Therefore, the performance of the program execution is improved and the read performance gap between NAND and NOR is filled up effectively. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「NOR flash replacement」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.