描述

MVI69E-MBS

存儲器優(yōu)化移動用戶體驗

? ? 作為專門針對移動應(yīng)用而設(shè)計的嵌入式器件，e.MMC可與應(yīng)用處理器高度集成，在高級移動操作系統(tǒng)(如谷歌的Android和Windows7)的時代，這點顯得至關(guān)重要。超級手機等高端移動設(shè)備對嵌入式存儲器的選擇幾乎會影響到移動用戶體驗的各個方面：性能、平臺、功耗、封裝和價格。雖然e.MMC器件都達到了標準規(guī)范，但是它們在移動設(shè)備中的表現(xiàn)好壞在很大程度上還取決于其設(shè)計方式，與主機的集成度以及針對現(xiàn)有應(yīng)用的定制是否合理。

? ? 性能

? ? 移動NAND閃存式存儲器件(如microSD卡或e.MMC嵌入式解決方案)的讀寫性能一般以MB/s為單位，這一性能也被稱為序列性能。在側(cè)載(side-load)的情況下，這點非常重要，比如將存儲器件與大型多媒體文件互相同步。e.MMC器件的性能因制造商而異，例如，iNANDExtremee.MMC器件具有杰出的序列性能，寫入速度最高可達50MB/s，讀取速度最高可達80MB/s(圖2)。

? ? 存儲器優(yōu)化移動用戶體驗

? ? 有時人們常常忽視性能的另一個方面，那就是在考慮高級移動操作系統(tǒng)和應(yīng)用程序時具有重要意義的隨機性能。隨機性能一般以IOPS(每秒輸入/輸出操作次數(shù))為單位，體現(xiàn)的是存儲器件對極小數(shù)據(jù)包(一般為4KB-8KB)讀寫操作的處理能力，這種操作在移動操作系統(tǒng)、文件系統(tǒng)和應(yīng)用程序后臺被經(jīng)常和反復(fù)執(zhí)行。存儲器件對應(yīng)用程序存取操作的反應(yīng)速度會影響應(yīng)用程序的啟動時間，網(wǎng)絡(luò)瀏覽和電子郵件等應(yīng)用的響應(yīng)速度，甚至器件的“瞬時啟動”功能。

? ? 在NAND存儲器件中實現(xiàn)高速的隨機性能并非易事，因為原始NAND器件的最小寫操作包(頁大小)通常會隨著閃存技術(shù)的發(fā)展增加，而性能則會下降。有多種不同的方法可以使最小可讀/寫包大小與物理NAND頁大小脫離關(guān)系，以提高隨機性能。例如，通過在MLCNAND芯片上植入一種強大的緩存機制，iNANDe.MMC器件最高可以實現(xiàn)300IOPS寫和2000IOPS讀(4KB)的隨機性能。這個類似SLC的指定托管區(qū)具有極高的隨機性能和卓越的耐用性，實際上充當著由操作系統(tǒng)和應(yīng)用程序驅(qū)動的重復(fù)性小數(shù)據(jù)操作的“暫存區(qū)”。

? ? 平臺

? ? 隨著移動技術(shù)和應(yīng)用的不斷發(fā)展，原始序列性能尤其是隨機性能顯得越來越重要，但與此同時還要注意處理器、存儲器件、操作系統(tǒng)、文件系統(tǒng)以及應(yīng)用程序之間的集成性能。過去，閃存式存儲器件一般僅由一種應(yīng)用程序訪問(例如，個人媒體播放器中的音樂文件或相機中的靜態(tài)圖像等)，因而可以針對這種操作專門進行優(yōu)化。然而，在眾多應(yīng)用進入當今高級智能手機和平板電腦的情況下，訪問嵌入式存儲器件的應(yīng)用程序不斷增多并且要求也各不相同，甚至有時還相互沖突(比如，高清或3D高清錄像應(yīng)用要求具有恒定的高速序列比特率，而電子郵件應(yīng)用則要求高速的隨機性能)。

產(chǎn)品承諾：
保?證?全新原裝進口,
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優(yōu)勢價格，大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊

PLC模塊，可編程控制器，CPU模塊，IO模塊，AI模塊，通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅

15天包退換一年質(zhì)保大量現(xiàn)貨? 國內(nèi)實力庫存商家

MVI69E-MBS

描述

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