目前，PC/104 與PC 機之間的通訊一般是以串行通訊或者并行通訊兩種方式來實現的，
然而USB 通訊正以其高速性和連接靈活性等優點而被廣泛關注。為實現PC/104 與PC 機之
間的USB 通訊，本文基于USB 總線接口芯片CH375 設計了PC104-USB 轉接板，詳細描述
了通訊中涉及的以偽中斷方式發起上傳數據流，以下傳API 發起下傳數據流的通訊方式，并給出了相關程序代碼。
關鍵字：USB 通訊；PC-104；偽中斷
Abstract: At present, communication between PC104 and PC is commonly realized by way of
serial communication or parallel communication, however USB communication enjoy great
popularization with many advantages such as high speed, joint flexibility and etc . In order to
realize the USB communication between PC104 and PC, PC104 transfer card is designed based on CH375 chip, then the way of that launching uploading data stream with pseudo interrupt mode and launching downloading data flow using API is mainly described. Finally the relative procedure code in the method is provided in the article.
Key Words: USB communication; PC-104; pseudo interrupt