【摘要】 本文介绍了一种可用于工业环境下ＰＣ机或ＰＣ兼容机与多个单片机系统进行远距离、多通路通信的智能通信卡。文中给出了通信卡的硬件构成、工作原理和通信过程、通信时序。更多还原

【Abstract】 This paper introduces a kind of intelligent communication cards. This communication card can communicate for long distance and multi-passage under industrial condition between PC or PC compatible computer and single-chip microcomputer systems. This paper recounts hardware con- struction. working principle and communication process, communication timing in the communica- tion card更多还原