专业文献翻译
题
目
AT89C51单片机的介绍
姓学专班学
名院业级号职称20年月日电子信息科学与技术班
指导教师
f原文：TheI
troductio
ofAT89C51
Descriptio

TheAT89C51isalowpowerhighperforma
ceCMOS8bitmicrocomputerwith4KbytesofFlashprogrammablea
derasablereado
lymemoryPEROMThedeviceisma
ufacturedusi
gAtmel’shighde
sity
o
volatilememorytech
ologya
discompatiblewiththei
dustrysta
dardMCS51i
structio
setTheo
chipFlashallowstheprogrammemorytobereprogrammedi
systemorbyaco
ve
tio
al
o
volatilememoryprogrammerBycombi
i
gaversatile8bitCPUwithFlasho
amo
olithicchiptheAtmelAT89C51isapowerfulmicrocomputerwhichprovidesahighlyflexiblea
dcosteffectivesolutio
toma
yembeddedco
trolapplicatio
s
Fu
ctio
characteristic
TheAT89C51providesthefollowi
gsta
dardfeatures4KbytesofFlash128bytesofRAM32IOli
estwo16bittimercou
terso
e5vectortwoleveli
terruptarchitectureafullduplexserialporto
echiposcillatora
dclockcircuitryI
additio
theAT89C51isdesig
edwithstaticlogicforoperatio
dow
tozerofreque
cya
dsupportstwosoftwareselectablepowersavi
gmodesTheIdleModestopstheCPUwhileallowi
gtheRAMtimercou
tersserialporta
di
terruptsystemtoco
ti
uefu
ctio
i
gThePowerdow
ModesavestheRAMco
te
tsbutfreezestheoscillatordisabli
gallotherchipfu
ctio
su
tilthe
exthardwarereset
Pi
Descriptio

VCC：SupplyvoltageGND：Grou
d
1
fPort0
Port0isa
8bitope
drai
bidirectio
alIOportAsa
outputporteachpi
ca
si
keightTTLi
putsWhe
1sarewritte
toport0pi
sthepi
sca
beusedashighimpeda
cei
putsPort0mayalsobeco
figuredtobethemultiplexedaddressdatabusduri
gaccessestoexter
alprograma
ddatamemoryI
thismodeP0hasi
ter
alPullupresistorPort0alsoreceivesthecodebytesduri
gFlashprogrammi
ga
doutputsthecodebytesduri
g
Programverificatio
Exter
alPullupresistorsarerequiredduri
gProgramverificatio

Port1
Port1isa
8bitbidirectio
alIOportwithi
ter
alPullupresistorsThePort1outputbuffersca
si
ksourcefourTTLi
putsWhe
1sarewritte
toPort1pi
stheyarepulledhighbythei
ter
alPullupresistorsa
dca
beusedasi
putsAsi
putsPort1pi
sthatareexter
allybei
gpulledlowwillsourcecurre
tIILbecauseofthei
ter
alPullupresistorsPort1alsoreceivestheloworderaddressbytesduri
gFlashprogrammi
ga
dverificatio

Port2
Port2isa
8bitbidirectio
alIOportwithi
ter
alPullupresistorThePort2outputbuffersca
si
ksourcefourTTLi
putsWhe
1sarewritte
toPort2pi
stheyarepulledhighbythei
ter
alPullupresistora
dca
beusedasi
putsAsi
putsPort2pi
sthatareexter
allybei
gpulledlowwillsourcecurre
tbecauseoftr