external bus

The bus technologies,especially the external bus technologies take a very important part in the instrument ATS,and are also considered as the bridge and tache of the ATS.

总线技术,特别是外部总线技术在装备自动测试系统(ATS)中占有十分重要的地位,是构成装备自动测试系统的桥梁与纽带。

In the light of different equipments connected, BUS can be classified into internal BUS, on-board partial BUS, system BUS, and external BUS, among which the on-board partial BUS has the most significant influence to the performance of the system.

根据连接设备的不同 ,总线一般可以分为内部总线、在板局部总线、系统总线和外部总线四种。

In the chip microcomputer system that may not make use of external bus(such as the system composed of AT89C51),data bus of ADC0809 can be directly connected with I/O port of the chip microcomputer,which controls ADC0809 directly.

ADC0 8 0 9是广泛使用的模 /数转换器 ,在可不采用外部总线结构的单片机系统中 (如由 AT89C5 1组成的系统 )。

It s the fundamental and foremost design for constituting an ADSP2106X application system to expand external memories and interfaces by the external bus port of ADSP2106X.

通过外部总线口扩展外部存储器和接口是构成ADSP2106X应用系统时最基本、最重要的设计。

On the basis of briefing the function characteristics and corresponding signal actions of external bus port of ADSP2106X,taking the 8155H chip that is a programmable parallel interface adopting address and data multiplex mode bus as an example,an interface circuit between the 8155H and ADSP2106X is designed,and the composing principle and work process of this circuit are explicated.

本文在介绍ADSP2106X外部总线口功能特点和相应信号作用的基础上,以地址/数据总线复用形式的可编程并行接口芯片8155H为例,设计了与ADSP2106X的接口电路,详细说明了该接口电路的组成原理与工作过程。