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本文讨论了用8237DMA控制器及8274多规程串行控制器开发STD工业控制计算机高速串行同步通信接口卡的设计方法。该卡具有STD总线规范、SDLC规程及RS—422标准接口。
This article discusses the design of a high-speed serial synchronous communication interface card for the STD industrial control computer using the 8237 DMA controller and the 8274 multi-protocol serial controller. The card has STD bus specification, SDLC procedures and RS-422 standard interface.