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HT45R2K-C Scheda tecnica(PDF) 81 Page - Holtek Semiconductor Inc |
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HT45R2K-C Scheda tecnica(HTML) 81 Page - Holtek Semiconductor Inc |
81 / 105 page Rev. 1.40 80 �a��� 1�� �01� Rev. 1.40 81 �a��� 1�� �01� HT45R2K-C/-B/-A Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale HT45R2K-C/-B/-A Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale CO M0 CO M1 CO M2 CO M3 L CD s egm ent s ON CO M2 s i de li ght ed VA VB VC VS S VS S VS S VS S VS S VA VB VC VA VB VC VA VB VC VA VB VC No te : 1/ 4 du ty , 1 /3 b ia s, R ty pe: " VA " VL CD, " VB " 2/ 3 VL CD, " VC " 1/ 3 VL CD L CD Dr iv e Ou tp ut ( 1/ 4 Du ty ) Programming Considerations CertainprecautionsmustbetakenwhenprogrammingtheLCD.Oneoftheseistoensurethat theLCDmemoryisproperlyinitialisedafterthemicrocontrollerispoweredon.LiketheGeneral PurposeDataMemory,thecontentsoftheLCDmemoryareinanunknownconditionafterpower- on.AsthecontentsoftheLCDmemorywillbemappedintotheactualLCD,itisimportantto initialisethismemoryareaintoaknownconditionsoonafterapplyingpowertoobtainaproper displaypattern. ConsiderationmustalsobegiventothecapacitiveloadoftheactualLCDusedintheapplication. AstheloadpresentedtothemicrocontrollerbyLCDpixelscanbegenerallymodeledasmainly capacitiveinnature,itisimportantthatthisisnotexcessive,apointthatisparticularlytrueinthe caseoftheCOMlineswhichmaybeconnectedtomanyLCDpixels.Theaccompanyingdiagram depictstheequivalentcircuitoftheLCD. Withsuchafrequencychosen,themicrocontrollerinternalLCDdrivercircuitswillensurethatthe appropriateLCDdrivingsignalsaregeneratedtoobtainasuitableLCDframefrequency. |
Codice articolo simile - HT45R2K-C_15 |
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Descrizione simile - HT45R2K-C_15 |
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