IC697BEM721

IC697BEM721

串口通訊

　　單片機都有UART接口，這個簡單、古老的通訊方式可以與我們PC機的RS232接口直接連接通訊，當(dāng)然，因為它們兩者電平邏輯不同，必須要使用一個RS232電平轉(zhuǎn)換芯片才能與PC機連接，例如Max232芯片。

　　UART接口的使用是非常重要的，通過這個接口，我們可以使單片機與PC機之間交換信息，“接口”概念的學(xué)習(xí)也便由此引入。使用UART接口也會學(xué)習(xí)到目前為簡單與常用的通信協(xié)議等知識。我們也可以通過PC機的串口調(diào)試軟件來監(jiān)視到單片機實驗板的數(shù)據(jù)，想一想，這會是一個多么神奇的事情啊~~

IC697BEM721

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