单片机【经典外文翻译】-51系列单片机的功能和结构(译文-英文)毕业论文.doc资源-CSDN文库

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Structure and function of the MCS-51 series

Structure and function of the MCS-51 series one-chip computer 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 .

An 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 depositting 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, 80C ,etc.. ( 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 duplexing 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

megahertas 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

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