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  3. 學習啦>學習電腦>選購與維護>臺式機>《只讀存儲器的原理是什么》正文

    只讀存儲器的原理是什么

    時間:2015-10-12 10:56:22本文內容及圖片來源于讀者投稿,如有侵權請聯系xuexila888@qq.com 孫勝龍 我要投稿

      今天,學習啦小編為大家帶來的是只讀存儲器方面的介紹,不知大家對于它了解多少,它是一種半導體存儲設備,對于只讀存儲器的工作原理又有多少人知道了,接下來,學習啦小編就將為你講述。

      只讀存儲器原理:

      只讀存儲器它是一類半導體的類型的存儲設備,它的特點為當我們將數據存儲其中就不能夠再進行改變或者是刪除操作,同時的內容也不會產生因為電源關閉變成沒有的情況。在電子以及電腦系統里面,經常地使用來進行存儲不會再需要變換的數據或者是程序。只讀存儲器還被叫做是固件,是一類在生產的過程里面將特定的數據產生過編程的集成電路。ROM芯片不但能夠使用在電腦,同時的大很多的其他的電子儀器里面也被使用。

    只讀存儲器的原理是什么

      ROM的存在的形式有許多種,一類是熔絲類型ROM,這種類型的生產商生產的產品進行保留以及陣列的所有的熔絲,當我們的用戶進行寫入信息的操作之后,保存的信息就能夠進行變換了,這類型的RO叫做可編程序只讀存儲器。還有一種類型的是當我們寫進內容之后,能夠使用紫外線對其進行照射或者是使用電方式進行擦除,再被肯定寫進新的信息,我們叫做前一種ROM為可改寫ROM,后面的的則是電可改寫ROM。另外還有一種類型的ROM的存儲內容它是在生產的進程中產生的,集成電路制造廠按照客戶所提供的存儲信息來進行光可掩模板的設計工作,采用制造或者是沒有制造的存儲器件的方式來進行存儲內容,這種類型的ROM叫做是掩模型只讀存儲器。它的簡稱被叫做MROM。

      只讀存儲器特點:

      這種類型的存儲器的不同之處為只能夠進行讀出的操作不可以用來隨便的寫進,在主板上面的ROM中進行固化了一個基礎的輸入以及輸出裝置,我們叫做為BIOS,它的主要的功能是完成裝置的加電自檢以及裝置各功能模塊的初始化操作等。

      從上面可以得知,我們的從另外的一個方面來看我們的ROM的構成:它分為兩個陣列構成與門陣列以及或門陣列兩種,里面的或的意思為客戶進行設置控制的,因此它是能夠進行編程操作的,我們的與陣列則是所有的最小的項的構成的,因此它是不能夠進行編程操作的。

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