It has five parts , such as integer execution unit , floating point unit ( fpu ) , instruction cache , bus interface unit and memory manage unit . the instructions are executed with pipeline way . the instruction set and i / o signals are compatible with powerpc 它由定点执行单元、浮点单元、指令cache 、总线接口单元、存储管理单元组成,以流水和超标量方式执行指令,指令集和接口时序兼容powerpc ,是典型的risc微处理器结构。
As conforming with the h . 323v2 and relevant national standards , the terminal has high interoperability with other h . 323 device , and has some main function units defined by standards such as system control unit , h . 225 layer unit , lan interface unit , and audio codec unit 323国际标准第二版和相关国内标准,能够和其它h 323设备互通,具有系统控制单元、 h 225layer单元、网络接口单元和语音编解码单元等协议中所规定功能单元。
The most important project of the study on high speed solid - state storage technique with compactflash card array is the design of parallel interface unit , which consists of two pieces of isplsi 3448 , one piece of isplsi 3448 realizes 4 - route branching , totaling to realize 8 - route branching 并行接口单元设计包括两部分,一部分是cf卡读写的实现,另一部分是并行分路的实现,并行接口单元由两片isplsi3448组成,每片实现分四路,共分八路。
An interface unit or circuitry that converts data to and from the representation used by a particular peripheral device or class of peripheral devices ; for example , a device that converts between bit serial and bit parallel and resolves differences in transmission speeds 一种接口部件或电路,用来把数据转换成某种特殊的外围设备上的表示或某类外围设备上的表示或把此种表示转换成数据。例如,一台在串行位和并行位之间作转换且解决传输速度差别的设备。
Mpc860 consists of three major blocks : the embedded powerpc core , the system interface unit ( or siu ) , and the communications processor module ( or cpm ) . the mpc860t extends mototola ' s mpc860 embedded processor family . this new derivative adds a 10 / 100mbps ethernet mac to the already extensive capabilities of the mpc860 Mpc860t是mpc860嵌入式处理器家族的一个扩展,在860基础上增加了对快速以太网( 100mbps )的支持。嵌入式linux系统是嵌入式系统的一个重要分支。
In this dissertation the pulse compression performances of linear frequency modulation signals ( lfm ) , nonlinear frequency modulation signals ( nlfm ) and design of their side - lobes suppression filters are analyzed , and design of the pulse compression program of 4 pieces of adsp21160 in the processing unit and the program of single piece of adsp21160 and fpga in the interface unit of the pulse compression system are introduced in detail 全文分析了线性调频信号( lfm ) ,非线性调频信号( nlfm )的频域脉冲压缩方法及其旁瓣抑制滤波器的设计和优化,详细介绍了脉冲压缩系统中基于4片adsp21160的处理单元和单片adsp21160和fpga组成的接口单元的软件设计。
The work in this thesis was part of a national 05 " project which task was designing the " longtengrl " microprocessor . there are four parts in " longtengrl " microprocessor : integer execution unit ( ieu ) , floating point unit ( fpu ) , memory subsystem unit ( msu ) and bus interface unit ( biu ) 本论文完成存储子系统单元的设计与实现、 “龙腾r1 ”系统的集成、存储子系统单元的验证以及在“龙腾r1 ”存储子系统基础上进行了tracecache的研究,其中重点讨论存储子系统的设计与实现。
The basic principle of natural gamma - ray log is stated , the developing background , developing ways and developing situation of natural gamma - ray tools are introduced . the researching task of the paper is presented through analyzing the using situation and questions exsisted in inner natural gamma - ray tools , the researching work is started from three aspects , they are logging tool development , reliability design and reliability assuring methods , and the data processing methods , in the course of logging tool development , instrument indexes are presented based on the compatible property of sookbps telemetry system and environmental property , the analog measuring chanel and the interface circuit which realizing the compatible performance are designed according to the instrument mdexes . the detecto * design . the plateau property testing of the detector and the analysis of it ' s affecting factors are stated , the measuring property of the tool is discused , a new type of single chip microcomputer is selected when designing the interface circuit , and the laboratory experiments has fulfiled conmunieating standard signals between the interface circuit , the universal interface unit of sookbps telemetry system and also 500kbps telemetry system 本文首先概要介绍了石油测井的基本概念、方法、条件、最新进展、以及应采取的研发对策,论述了自然伽玛测井的基本原理,介绍了自然伽玛测井仪的发展背景、发展历程和发展现状,通过分析国内自然伽玛测井仪的使用情况和存在的问题,提出了本文的研究任务。研制工作从测井仪研制、可靠性设计与可靠性保障技术、数据处理方法研究三个方面展开,在测井仪研制过程中,根据500kbps遥传系统要求的配接性能和使用环境特征,提出了主要仪器指标,并根据这些指标,设计了仪器模拟测量通道和实现这一配接性能的接口电路;论述了探测器的设计、坪特性影响因素分析及其测试,探讨了仪器的测量性能;在设计接口电路时选用了新型单片机芯片,并与500kbps遥传通用接口单元rtu 、 500kbpa遥传系统实现了室内配接。