MCS-51系列单片机的功能和结构毕业论文外文文献翻译及原文(20200520011820).pdf

毕 业 设 计 论文 外 文 文 献 翻 译 文献 资料中文题目 MCS 51系列单片机的功能和结构 文献 资料英文题目 Structure and function of the MCS 51 series 文献 资料来源 文献 资料发表 出版 日期 院 部 专业 班级 姓名 学号 指导教师 翻译日期 2017 02 14 MCS 51 系列单片机 中英文资料对照外文翻译文献综述 Structure and function of the MCS 51 series Structure 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 introducing 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 one 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 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 exporting 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 the 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 capacity 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 controller 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 8 s accumulation device ACC register B and procedure state register PSW etc Person who accumulate 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 station 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 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 chip 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 of 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 memory 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 temporarily 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 of 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 formation 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 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