基于单片机的多路温度采集系统毕业设计(论文)外文翻译.doc

《基于单片机的多路温度采集系统毕业设计(论文)外文翻译.doc》由会员分享，可在线阅读，更多相关《基于单片机的多路温度采集系统毕业设计(论文)外文翻译.doc（10页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、华南理工大学广州学院本科毕业设计论文外文翻译外文原文名 Structure and function of the MCS-51 series 中文译名 MCS-51系列的功能和结构 学 院 电子信息工程学院 专业班级 自动化一班 学生 黎杰明 学生学号 201230087093 指导教师 吴实 填写日期 2016年3月10日 外文原文版出处：association for computing machinery journal1990, Vol.33 (12), pp.16-ff 译文成绩： 指导教师导师组长签名： 译文：MCS-51系列的功能和结构MSC-51系列单片机具有一个单芯片电脑的

2、结构和功能，它是英特尔公司的系列产品的名称。这家公司在1976年推出后，引进8位单芯片的MCS-48系列电脑后于1980年推出的8位的MCS-51系列单芯片电脑。诸如此类的单芯片电脑有很多种，如8051，8031，8751，80C51BH,80C31BH等，其基本组成、基本性能和指令系统都是相同的。8051是51系列单芯片电脑的代表。一个单芯片的电脑是由以下几个部分组成：1一个8位的微处理器CPU。2片内数据存储器RAM128B/256B,它只读/写数据，如结果不在操作过程中，最终结果要显示数据3程序存储器ROM/EPROM(4KB/8KB).是用来保存程序一些初步的数据和切片的形式。但一些单

3、芯片电脑没有考虑ROM/EPROM,如8031，8032，80C51等等。44个8路运行的I/O接口，P0，P1，P2，P3，每个接口可以用作入口，也可以用作出口。5两个定时/计数器， 每个定时方式也可以根据计算结果或定时控制实现电脑。65个中断7一个全双工串行的I/UART通用异步接收器I口/发送器UART，它是实现单芯片电脑或单芯片电脑和电脑的串行通信使用。振荡器和时钟产生电路，需要考虑石英晶体微调能力。允许振荡频率为12MHz，每个上述的部分都是通过内部数据总线连接。其中CPU是一个芯片电脑的核心，它是电脑的指挥中心，是由算术单元和控制器等部分组成。算术单元可以进行位算术运算和逻辑运算，

4、ALU单元是其中一种运算器，18个存储设备，暂存设备的积累设备进行协调，程序状态寄存器PSW积累了2个输入端的计数等检查暂时作为一个操作往往由人来操作，谁储存1输入的是它使操作去上暂时计数，另有一个操作的结果，回环协调。此外，协调往往是作为对8051内的数据传输转运站考虑。作为一般的微处理器，解码的顺序。振荡器和定时电路等的程序计数器是一个由8个计数器为2，总计16位。这是一个字节的地址，其实程序计数器，是将在个人电脑内进行。从而改变它的内容可以改变它的程序进行。在8051的单芯片电脑的电路，只需要外部石英晶体和频率微调电容，其频率范围为1.2MHz到12MHz。这种脉冲信号，作为8051的工

5、作，即单位时间的最低基本节奏。8051是其他电脑一样，控制的基本工作在于和谐，就像一个管弦乐队，根据击败发挥是指挥。有光盘程序存储器，只能读取，并在8051片数据存储器RAM，可以是可写可读，他们各自独立的内存地址空间，处理方法与一般的电脑记忆体相同。8051可8751的程序存储的存储容量4KB的程序切片，地址开始从0000H开始执行，维护的程序和形式不断使用。数据8051-8751的内存数据存储器128B条8031，地址虚假00FH，中层结果存入操作使用，数据存储和数据暂时缓冲等。在这128B条内存，有32字节，可以作为工作寄存器使用，这和一般的微处理器是不同的，8051片RAM和登记形式的

6、同一级到安排的位置。这不是很相同，MCS-51系列内存的单芯片电脑和通用电脑为主。通用电脑的第一个地址空间，ROM和RAM,可安排在不同的空间在这个范围内的地址范围，即ROM和RAM 地址的形成与分布在不同的地址空间。在访问内存，相应的，只有一个地址的内存单元，可以用外部存储，也可以内存，并通过访问顺序与此类似。这种内存结构的一种被称为普林斯顿结构。8051记忆分为程序存储器空间和数据存储空间的物理结构上划分，有四个在所有的记忆体空间。在1和数据外部数据存储器和程序存储器空间之一，一组在外面一个内存空间的程序商店，结构这一种形式的程序和数据存储器器件数据存储分开的形式，称为哈佛结构。但是，从用

7、户使用，8051的内存地址空间分为三种：分为1片内，使用16个地址一致的FFFFH，地点为0000H。264KB的外部数据存储器空间的一个地址，该地址是从0000H开始执行64KB的FFFFH安排16地址，也到该位置。3数据存储器的256B使用8个地址的地址空间。上述三个内存空间的地址重叠，区分和设计的8051指令系统中不同的数据传输顺序代码，CPU的访问片，访问RAM块顺序使用MOVX指令外片，内存为访问片。8051单芯片的电脑有4个8步行并进的I/O端口，分别为P0,P1,P2和P3。每个端口8位的双向口，共占了32针。每一个I/O线可作为独立的入口和出口。每个端口包括一个锁存器，1名入口

8、和一出口引进缓冲区。使数据能锁存输出时，数据缓冲区时，可以引进，但4个通道这些自我相同的功能。系统中的内存片展开外来的，这四个港口可作为准确的双向的I/O共同使用的输出口。系统的内存中展开外来的片，P2口处于高位，8地址关闭；入口P0口是双向总线，发送地址和8个低数据。8051单芯片电脑的4个I/O端口是非常巧妙的电路设计。熟悉I/O端口的逻辑电路，不仅有助于正确和合理利用端口，并在一定程度上将有助于设计周边的单芯片电脑的逻辑电路。在一定程度上负载能力和端口界面有一定的要求，因为输出级和P1口输出端，P3口与P0口结构的不同，因此，负载能力和接口需求互相无太多共同之处。求解P0口是与其他口不同

9、，它的输出级提取阻力。当使用的常用是它的输出级电路泄漏打开，它是利用它敦促采取NMOS管能与它外部的阻力，而输入走出失败。当被用作数据，应该写“1”到内部，每一个P0口与一个可以驱动8型号LS TTL负载出口。P1口是一个准确的双向口，共同使用输出口。不同在P0口输出的电路，得出与负载功率电阻内有联系。事实上，阻力是两个效果是在场效应管，同负责：一个场效应管的负载负责，它的电阻是正常的。另一条是它可以导致在来两个工作状态密切，使其电阻值变化近似0或2阻值的情况非常严重。当它是0，该阻力是近似的，可以提请较快的高层次，当电阻值是非常大的，P1口以阻碍引进高电平。为P1口输出高电平时，它是可以借鉴

10、的负载提供电流向外，提请电阻无须答复。在这里，当端口作为引进使用，必须首先写入1到相应的锁存，使FET的结束。相对约20000欧姆，因为在现场，负载电阻和40000欧姆，不会产生对输入的数据的影响。一些为P2结构类似于P0口，有MUX的开关。它是类似口部分，大的一个转换控制P1口的多功能端口，获得第一位，这有很多“与”门和4个缓冲。两部分中提供准确的双向功能，还可以使用第二个函数的每一个针“与”门三功能开关，实际上，它决定将输出数据锁存到输出的函数的第二个信号为W=1点，输出Q端信号。法令：Q=1时，可以输出W线路信号，在制定方案的时候，那就是第一个函数仍是第二个功能，但不必软件预先设置P3口

11、。IT硬件里面是不是有自动两个函数输出时的CPU进行SFR和要求的位置来访问，在没有至P3口，里面有硬件锁Q报表，P3口的工作原理类似于P1口。输出级，P1,P3口连接内带的负载电阻的图纸，每一个能驱动4型号LS TTL负载输出1。由于输入口，任何TTL或NMOS电路可以驱动8051的单芯片子在一个正常的方式。因为他们利用输出级阻力，可以打开漏源电阻以敦促打开方式，不需要有阻力。都是准确的双向口。当行为是输入，必须编写相应的锁存器。至于80C51单芯片电脑，端口只能提供输出毫安的电流，是它的输出口去当一个普通的晶体管，要求应与端口之间和晶体管的基极电阻，以电而从出口限制P1P3被恢复了的高水平

12、，是一个单芯片电脑初始化操作。其主要功能是把最初的PC为0000H，使单芯片电脑开始持有单位0000H开始执行程序的行为。唯一例外的是那些进入系统初始化正常，程序操作，而是因为它犯了错或没有错，为了摆脱自己的困境，需要按下和恢复位的按键重新启动了。这是一个输入端是恢复位，在8051中国RST引脚信号。恢复位的信号复原到高一级的有效值，应维持24倍以上的有效周期。如果是有频率6，恢复位的信号持续时间应超过4微秒完成恢复。设计的电路，恢复位的信号逻辑图：恢复位的电路和芯片包括两个部分外完全。以外的电路产生恢复到施密特触发了位信号RST),恢复位电路例如输出，施密特不断在每个S5P2,触发机循环，那

13、么就得到了恢复位所需的信号。复原6电阻的电路一般，电容参数适合，它是可以恢复到较高水平的信号持续时间大于2个机器周期来保证。作为恢复到电路，其功能是非常重要的。一个芯片的电脑系统能够正常运转，应先检查它可不可以恢复。检查可以弹出一个首部和监测与示波器针暂定，推动并恢复位的关键，波形式观察和有足够的范围是出口，也可以通过它使恢复电路进行改变。备注：1、外文原文出处包括出版社、出版时间、期刊的刊名、刊号、刊期。2、电脑打印，用A4纸；中文译名用小二号宋体加粗，正文用小四号宋体英文需用Times New Roman字体，行距固定值20磅。3、用A4纸附上外文原文在翻译文后面。4、提交3000汉字或1

14、.2万印刷符以上的外文翻译。外文原文：Structure and function of the MCS-51 seriesStructure and function of the MCS-51 series one-chip computer MCS-51 is a name of a piece of one-chip computer series which Intel Company produces. This company introduced 8 top-grade one-chip computers of MCS-51 series in 1980 after intr

15、oducing 8 one-chip computers of MCS-48 series in 1976. It belong to a lot of kinds this line of one-chip computer the chips have, such as 8051, 8031, 8751, 80C51BH, 80C31BH,etc., their basic composition, basic performance and instruction system are all the same.8051 daily representatives-51 serial o

16、ne-chip computers.A one-chip computer system is made up of several following parts: (1) One microprocessor of 8 (CPU). (2) At slice data memory RAM (128B/256B),it use not depositing not can reading /data that write, such as result not middle of operation, final result and data wanted to show, etc. (

17、3) Procedure memory ROM/EPROM (4KB/8KB ), is used to preserve the procedure , some initial data and form in slice. But does not take ROM/EPROM within some one-chip computers, such as 8031, 8032.(4) Four 8 run side by side I/O interface P0 four P3, each mouth can use as introduction , may use as expo

18、rting too. (5) Two timer / counter, each timer / counter may set up and count in the way, used to count to the external incident, can set up into a timing way too, and can according to count or result of timing realize the control of the computer. (6) Five cut off cutting off the control system of t

19、he source. (7) One all duplex serial I/O mouth of UART (universal asynchronous receiver/transmitter (UART) ), is it realize one-chip computer or one-chip computer and serial communication of computer to use for. (8) Stretch oscillator and clock produce circuit, quartz crystal finely tune electric ca

20、pacity need outer. Allow oscillation frequency as 12 megahertz now at most. Every the above-mentioned part was joined through the inside data bus .Among them, CPU is a core of the one-chip computer, it is the control of the computer and command centre, made up of such parts as arithmetic unit and co

21、ntroller , etc. The arithmetic unit can carry on 8 persons of arithmetic operation and unit ALU of logic operation while including one, the 1 storing device temporaries of 8, storing device 2 temporarily, 8s accumulation device ACC, register B and procedure state register PSW, etc. Person who accumu

22、late ACC count by 2 input ends entered of checking etc. temporarily as one operation often, come from person who store 1 operation is it is it make operation to go on to count temporarily , operation result and loop back ACC with another one. In addition, ACC is often regarded as the transfer statio

23、n of data transmission on 8051 inside. The same as general microprocessor, it is the busiest register. Help remembering that agreeing with a express in the order. The controller includes the procedure counter, the order is deposited, the order deciphering, the oscillator and timing circuit, etc. The

24、 procedure counter is made up of counter of 8 for two, amounts to 16. It is a byte address counter of the procedure in fact, the content is the next IA that will carried out in PC. The content which changes it can change the direction that the procedure carries out. Shake the circuit in 8051 one-chi

25、p computers, only need outer quartz crystal and frequency to finely tune the electric capacity, its frequency range is its 12MHZ of 1.2MHZ. This pulse signal, as 8051 basic beats of working, namely the minimum unit of time. 8051 is the same as other computers, the work in harmony under the control o

26、f the basic beat, just like an orchestra according to the beat play that is commanded.There are ROM (procedure memory , can only read ) and RAM in 8051 slices (data memory, can is it can write ) two to read, they have each independent memory address space, dispose way to be the same with general mem

27、ory of computer. Procedure 8051 memory and 8751 slice procedure memory capacity 4KB, address begin from 0000H, used for preserving the procedure and form constant. Data 8051- 8751 8031 of memory data memory 128B, address false 00FH, using for middle result to deposit operation, the data are stored t

28、emporarily and the data are buffered. In RAM of this 128B, there is unit of 32 bytes that can be appointed as the job register, this and general microprocessor is different, 8051 slice RAM and job register rank one formation the same to arrange the location. It is not very the same that the memory o

29、f MCS-51 series one-chip computer and general computer disposes the way in addition. General computer for first address space, ROM and RAM can arrange in different space within the range of this address at will, namely the addresses of ROM and RAM, with distributing different address space in a form

30、ation. While visiting the memory, corresponding and only an address Memory unit, can ROM, it can be RAM too, and by visiting the order similarly. This kind of memory structure is called the structure of Princeton. 8051 memories are divided into procedure memory space and data memory space on the phy

31、sics structure, there are four memory spaces in all: The procedure stores in one and data memory space outside data memory and one in procedure memory space and one outside one, the structure forms of this kind of procedure device and data memory separated form data memory, called Harvard structure.

32、 But use the angle from users, 8051 memory address space is divided into three kinds: (1) In the slice, arrange blocks of FFFFH, 0000H of location, in unison outside the slice (use 16 addresses). (2) The data memory address space outside one of 64KB, the address is arranged from 0000H 64KB FFFFH (wi

33、th 16 addresses) too to the location. (3) Data memory address space of 256B (use 8 addresses). Three above-mentioned memory space addresses overlap, for distinguishing and designing the order symbol of different data transmission in the instruction system of 8051: CPU visit slice, ROM order spend MO

34、VC , visit block RAM order uses MOVX outside the slice, RAM order uses MOV to visit in slice.8051 one-chip computer have four 8 walk abreast I/O ports, call P0, P1, P2 and P3. Each port is 8 accurate two-way mouths, accounts for 32 pins altogether. Every one I/O line can be used as introduction and

35、exported independently. Each port includes a latch (namely special function register), one exports the driver and a introduction buffer. Make data can latch when outputting, data can buffer when making introduction, but four function of pass away these self-same. Expand among the system of memory ou

36、tside having slice, four ports these may serve as accurate two-way mouth of I/O in common use. Expand among the system of memory outside having slice, P2 mouth see high 8 address off; P0 mouth is a two-way bus, send the introduction of 8 low addresses and data / export in timesharing The circuit of

37、8051 one-chip computers and four I/O ports is very ingenious in design. Familiar with I/O port logical circuit, not only help to use port correctly and rationally, and will inspire to designing the peripheral logical circuit of one-chip computer to some extent. Load ability and interface of port hav

38、e certain requirement, because output grade, P0 of mouth and P1 end output, P3 of mouth grade different at structure, so, the load ability and interface of its door demand to have nothing in common with each other. P0 mouth is different from other mouth, its output grade draws the resistance supreme

39、ly. When using it as the mouth in common use, output grade is it leak circuit to turn on, is it urge NMOS draw the resistance on taking to be outer with it while inputting to go out to fail. When being used as introduction, should write1 to a latch first. Every one with P0 mouth can drive 8 Model LS

40、 TTL load to export. P1 mouth is an accurate two-way mouth too, used as I/O in common use. Different from P0 mouth output of circuit its, draw load resistance link with power on inside have. In fact, the resistance is that two effects are in charge of FET and together: One FET is in charge of load,

41、its resistance is regular. Another one can is it lead to work with close at two state, make its President resistance value change approximate 0 or group value heavy two situation very. When it is 0 that the resistance is approximate, can draw the pin to the high level fast; when resistance value is

42、very large, P1 mouth high electricity at ordinary times, can is it draw electric current load to offer outwards, draw electric current load to offer outwards, draw the resistance on neednt answer and thinking. Here when the port is used as introduction, must write into 1 to the corresponding latch f

43、irst too, make FET end relatively about 20,000 ohms because of load resistance in scene and because 40,000 ohms, will not exert an influence on the data that are input. The structure of P2 some mouth is similar to P0 mouth, there are MUX switches. Is it similar to mouth partly to urge, but mouth lar

44、ge a conversion controls some than P1.P3 mouth one multi-functional port, mouth getting many than P1 it have 3 doors and 4 buffers. Two parts there, make her besides accurate two-way function with P1 mouth just, can also use the second function of every pin, and door 3 functions one switch in fact,

45、it determines to be to output data of latch to output second signal of function. Act as W=At 1 oclock, output Q end signal; act as Q=At 1 oclock, can output W line signal. At the time of programming, it is that the first function is still the second function but neednt have software that set up P3 m

46、outh in advance .It hardware not inside is the automatic to have two function outputted when CPU carries on SFR and seeks the location to visit to P3 mouth/at not lasting lining, there are inside hardware latch Qs=1. The operation principle of P3 mouth is similar to P1 mouth.Output grade, P3 of mout

47、h, P1 of P1, connect with inside have load resistance of drawing, every one of they can drive 4 Model LS TTL load to output. As while inputting the mouth, any TTL or NMOS circuit can drive P1 of 8051 one-chip computers as P3 mouth in a normal way. Because draw resistance on output grade of them have

48、, can open a way collector too or drain-source resistance is it urge to open a way, do not need to have the resistance of drawing outer. Mouths are all accurate two-way mouths too. When the conduct is input, must write the corresponding port latch with 1 first. As to 80C51 one-chip computer, port can only offer milliampere of output electric currents, is it output mouth go when urging one ordinary basing of transistor to regard as, should contact a resistance among the port and transistor base, in order to the electricity while restra