Interface circuit and the design of control program in asynchronous transfer mode between AT89C51 single chip microcomputer system and intelligent MODEM are introduced.

介绍AT 89 C 51单片机系统与智能调制解调器MODEM之间的接口电路和异步传输方式下的控制程序设计。

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In such cases, the part of the program that detects the problem needs a way to transfer control to the part of the program that can handle the problem.

在这些情况下，检测出问题的那部分程序需要一种方法把控制权转到可以处理这个问题的那部分程序。

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The way of data transfer in DMA mode, control method of logical programmable device and design of driver program are discussed to solve the key point of sequential transmission.

给出DMA工作方式下数据传输的设计方法，可编程逻辑器件的控制逻辑和驱动程序设计，解决了数据传输连续性的关键问题。

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Those included stored memory (the ability to hold both a stored program and data), conditional control transfer, which allowed the computer to stop and be resumed, and the central processing unit, which allowed all computer functions to be coordinated through one source.

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