摘要
本文主要结合STD工业控制机（以下简称工控机）的特点，设计并研制了适用于STD工控机的配有8257DMA控制器的高速串行通讯卡，并已研制成了产品。文中详细介绍了8257DMA控制器及8274多规程串行控制器的芯片功能，并且对通讯卡各部分的硬件及软件也作了详细的说明。
In this paper, We mainly designed the High - Speed - Serial -Communication Card, Which is suit for the STD industry-Controller Computer. A relative production has been sucessfully manufactured. It not only introduces the characteristics of the 8257 DMA Controller and 8274 Multi-Protocol -Serial -Controller,but also gives the detailed explanation of the software and hardware about the card.
出处
《微处理机》
1995年第4期26-31,共6页
Microprocessors
