Datenblatt-Suchmaschine für elektronische Bauteile |
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HT45R2K-C Datenblatt(PDF) 77 Page - Holtek Semiconductor Inc |
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HT45R2K-C Datenblatt(HTML) 77 Page - Holtek Semiconductor Inc |
77 / 105 page Rev. 1.40 76 �a��� 1�� �01� Rev. 1.40 77 �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 LCD Driver Forlargevolumeapplications,whichincorporateanLCDintheirdesign,theuseofacustom displayratherthanamoreexpensivecharacterbaseddisplayreducescostssignificantly.However, thecorrespondingsignalsrequired,whichvaryinbothamplitudeandtime,todrivesuchacustom displayrequiremanyspecialconsiderationsforproperLCDoperationtooccur.TheHoltek LCDDriverfunction,withitsinternalLCDsignalgeneratingcircuitryandvariousoptions,will automaticallygeneratethesetimeandamplitudevaryingsignalstoprovideameansofdirectdriving andeasyinterfacingtoarangeofcustomLCDs. LCD Memory AnareaofDataMemoryisespeciallyreservedforusebytheLCDdata.Thisdataarea isknownastheLCDMemory.Anydatawrittenherewillbeautomaticallyreadbythe internalLCDdrivercircuits,whichwillinturnautomaticallygeneratethenecessaryLCD drivingsignals.ThereforeanydatawrittenintotheLCDMemorywillbeimmediately reflectedintotheactualLCDdisplayconnectedtothemicrocontroller.Thestartaddressof theLCDMemoryis40H;theendaddressoftheLCDMemoryis5BH. AstheLCDDataMemoryaddressesoverlapthoseoftheGeneralPurposeDataMemory, theLCDDataMemoryisstoredinitsownmemorydatabank,whichisdifferentfrom thatoftheGeneralPurposeDataMemory.TheLCDDataMemoryisstoredinBank1. TheDataMemoryBankischosenbyusingtheBankPointer,whichisaspecialfunction registerintheDataMemory,withthename,BP.WhenthelowestbitoftheBankPointer hasthebinaryvalue“0”,onlytheGeneralPurposeDataMemorywillbeaccessed,no readorwriteactionstotheLCDMemorywilltakeplace.ToaccesstheLCDMemory thereforerequiresfirstthatBank1isselectedbysettingthelowestbitoftheBankPointer tothebinaryvalue“1”.Afterthis,theLCDMemorycanthenbeaccessedbyusing indirectaddressingthroughtheuseofMemoryPointerMP1.WithBank1selected,then usingMP1toreadorwritetothememoryarea40H~5BH,willresultinoperationstothe LCDMemory.DirectlyaddressingtheLCDMemoryisnotapplicableandwillresultina dataaccesstotheBank0GeneralPurposeDataMemory. 40H 41H 5A H 5B H SE G0 SE G1 SE G2 6 SE G2 7 LCD Memory Map |
Ähnliche Teilenummer - HT45R2K-C_15 |
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Ähnliche Beschreibung - HT45R2K-C_15 |
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