单片机-外文翻译-外文文献-英文文献-51系列单片机的结构和功能.doc
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2023-07-10
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外文原文：
Structure and function of the MCS-51
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 .
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 temporarilies 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 loopback 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
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