Because there is no inner ram in cpu of 8031 single - chip and addresses of program memory and data memory are organized separately , in order to attain the goal of self - developing and to realize self - developing function of single - chip applying system , the address of program memory and data memory should be organized uniformly to be read and written for program memory and be revised for it during debugging , modifying and unloading programs 由于8031单片机的cpu无片内ram ，其程序存储器和数据存储器又是分开编址的，因此，为了达到自开发的目的、实现单片机应用系统的自开发功能，需要对程序存储器和数据存储器进行统一编址，使程序存储器可读写，以便在程序调试、修改、下装过程中修改程序存储器。
And now it has become the most useful routing protocol in the construction of great network . relatively , the paper discusses the internal mechanism of internet routing particularly and roundly , which involved router mechanism , ip address , routing table , routing framework and the two most familiar routing algorithm - distance - vector and link - state 本文较细致、全面地讨论了internet路由选择的内部工作机制，包括路由器的工作原理、 ip编址、路由表、 internet路由选择体系结构，以及两种主要的路由选择技术?距离矢量与链路状态算法。
The mssr mode s technology , which was introduced firstly for the purpose of air tranfic control ( atc ) system , is based on the individually addressing and selective interrogation technology . the mode s can overcome many problems exist in mode a / c , such as signal interference , limited aircraft identification , garble and fruit , and provides the ability to build digital data link . many countries and organizations do them best to support researches about the communication , navigation and surveillance technology , which are all based on the mode s , and many productions have been adopted step by step by the international civil aviation organization ( icao ) . so , to research the key technologies of mode s will contribute a lot to the development of domestic aviation system , especially for the air control system , identification friend foe and navigation system 它建立在独立编址、选择性询问的基础之上,能够解决在模式a / c中存在的信号干扰、有限的信息编码、幻影( garble )和异步应答( fruit )等问题,同时在数据链路方面有着巨大的潜力。国际上,模式s的数据链技术得到了广泛的关注,许多国家和组织大力支持基于模式s的通信、导航和监视技术以及航空管理新技术的研究,许多成果正逐步被国际民用航空组织( icao )所采用。因此,对模式s核心技术的深入研究对于我国在航空管理、敌我识别、导航等方面的发展有着重大的意义。
Based on this , we delve further into the system architecture , system behavior and system configuration of profibus - dp . its transfer techniques , media access control methods , data transfer services and address assigning mechanism are introduced , while their characteristics are also analyzed 在此基础上，进一步分析了profibus - dp控制系统的系统结构、系统行为和系统配置形式，并对它的传输技术、介质访问控制方式、数据传输服务以及站点地址编址机制进行了介绍，分析了它们的特点。
Peripheral devices in embedded systems are often connected to the mcu as memory - mapped i / o devices , using the microcontroller ' s parallel address and data bus . this results in lots of wiring on the pcb ' s to route the address and data lines , not to mention a number of address decoders and glue logic to connect everything 由于并行总线扩展时连线过多，外围器件工作方式各异，外围器件与数据存储器混合编址等，都给单片机应用系统设计带来布线复杂，线路板面积大，易引起emi和esd干扰等困难，这在一些比较复杂的应用系统是难以接受的。
In the meanwhile , we build a complete simulation model of layered wireless self - organizing routing network and verify feasibility of network architecture and key technologies , including operating mode of wireless interface , addressing and routing in lwsrn we study the performance of wsrn in terms of routing overhead , packet delivery ratio , and the communication capability , and compare these result with that of ad hoc network 同时，构造了完整的分层结构的无线自组织路由网络仿真模型。验证了网络体系结构和关键技术的可行性，包括无线信道工作方式、网络编址技术、网络路由过程。并通过仿真分析了分层结构的无线自组织路由网络的路由负载、网络数据到达率和网络通信容量。
