CPU總線是在計算機系統中 的總線，同時也是芯片組與主板的核心。人們通常把和CPU直接相連的局部總線叫做CPU總線或者稱之為內部總線，將那些和各種通用的擴展槽相接的局部總線叫做系統總線或者是外部總線。在內部結構比較單一的CPU中，往往只設置一組數據傳送的總線即CPU內部總線，用來將CPU內部的寄存器和算數邏輯運算部件等連接起來，因此也可以將這一類的總線稱之為ALU總線。而部件內的總線，通過使用一組總線將各個芯片連接到一起，因此可以將其稱為部件內總線，一般會包含地址線以及數據線這兩組線路。系統總線指的是將系統內部的各個組成部分連接在一起的線路，是將系統的整體連接到一起的基礎；而系統外的總線，是將計算機和其他的設備連接到一起的基礎線路。 [4] 

李睿 180-6095加8542  福建石屹科技有限公司

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