电极板喷上与笔画相对应的“日”字形的电极并接公共端COM。另外时钟的校对采用与校对普通电子表相同的操作方式来完成，只需按K1、K2这两个键来校时校分。AT89C52的XTAL1和XTAL2分别为反向器的输入和输出，RST为复位输入，由它再接一个上拉电阻，引脚被拉高，P1口作为电子钟的位选，P3口部分作为电子钟的输出端。
关键词电子钟单片机液晶显示
LCDSCREENDISPLAYBASEDONSINGLECHIPDESIGNOF
II
f基于单片机的液晶屏显示的电子时钟设计
THEELECTRONICCLOCK
ABSTRACT
Thisdesig
istheuseofliquidcrystaldisplaysbasedo
AT89C52microco
trollerproducedbyusefulLCDelectro
icclocktocompletetimi
gscori
g
amelyseco
da
dtheschooltheschoolsubfu
ctio
sMicroprocessorisamicroco
trollercorecomputi
ga
dco
trolthecompletio
oftheoperatio
ofserialportdatamemorya
dtheresetcircuitclockcircuitproofreadi
gcircuitco
trolledbyamicroprocessortocompletetheirtasksThefi
aladoptio
ofliquidcrystaldisplayhoursmi
utesa
dseco
dsI
theoscillatorisru
i
gresetdepe
dso
theRSTorRSTpi
toexertsustai
edtwomachi
ecycletoachievehighi
theRSTpi
isappliedtothefirst2cyclesofhighimpleme
tatio
ofi
ter
alresetAftertheru
o
cepercycleu
tilRSTcha
geWhe
resetALEa
dRSENoutputhighmachi
eALE1a
dRSEN1o
chipRAMis
ottheimpactofreseta
dresetafterthePCpoi
tfromthestartaddressof0000Hto0000HMicroco
trollerbegi
impleme
tatio
proceduresI
ter
alclockusedi
thedesig
modethe
e
dsi
theXTAL1a
dXTAL2crystala
dthei
ter
alstabilityofthereversedeviceco
stitutesaselfexcitedoscillatorclockpulsese
tdirectlyi
totheo
chiptimi
gco
trolu
ittheLCDclocklastby6LCDdisplaytubedisplaywhe
mi
utesa
dseco
dsSegme
tLCDdisplaywithseve
segme
tdisplayitsstructureexcepti
theelectrodeplatesprayO
atogoftheseseve
strokesthelowerelectrodeplatesarealsosprayedwiththestrokes
III
f基于单片机的液晶屏显示的电子时钟设计
correspo
di
gtothe