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HT69F360 数据表(PDF) 205 Page - Holtek Semiconductor Inc

部件名 HT69F360
功能描述  TinyPowerTM I/O Flash MCU with LCD & EEPROM
PDF  235 Pages
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制造商  HOLTEK [Holtek Semiconductor Inc]
网页  http://www.holtek.com
标志 HOLTEK - Holtek Semiconductor Inc

HT69F360 数据表(HTML) 205 Page - Holtek Semiconductor Inc

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Rev. 1.30
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HT69F340/HT69F350/HT69F360
TinyPowerTM I/O Flash MCU with LCD & EEPROM
HT69F340/HT69F350/HT69F360
TinyPowerTM I/O Flash MCU with LCD & EEPROM
Programming Considerations
CertainprecautionsmustbetakenwhenprogrammingtheLCD.Oneoftheseistoensurethatthe
LCDMemory isproperlyinitializedafterthemicrocontrollerispoweredon.LiketheGeneral
PurposeDataMemory,thecontentsoftheLCDMemoryareinanunknownconditionafterpower-on.
AsthecontentsoftheLCDMemorywillbemappedintotheactualdisplay,itisimportantto
initilisethismemoryareaintoaknownconditionsoonafterapplyingpowertoobtainaproper
displaypattern.
ConsiderationmustalsobegiventothecapacitiveloadoftheactualLCDusedintheapplication.
AstheloadpresentedtothemicrocontrollerbyLCDpixelscanbegenerallymodeledasmainly
capacitiveinnature,itisimportantthatthisisnotexcessive,apointthatisparticularlytrueinthe
caseoftheCOMlineswhichmaybeconnectedtomanyLCDpixels.Theaccompanyingdiagram
depictstheequivalentcircuitoftheLCD.
One additional consideration that must be taken into account is what happens when the
microcontrollerenterstheIdleorSlowMode.TheLCDENcontrolbitintheLCDC0register
permitsthedisplaytobepoweredofftoreducepowerconsumption.Ifthisbitiszero,thedriving
signalstothedisplaywillcease,producingablankdisplaypatternbutreducinganypower
consumptionassociatedwiththeLCD.
Afterpoweron,notethatastheLCDENbitwillbeclearedtozero,thedisplayfunctionwillbe
disabled.
CO M0
CO M1
CO M2
CO Mn
SE G0
SEG 1S EG 2
SEG n
LCD Panel Equivalent Circuit



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