 |
전자부품 데이터시트 검색엔진 |
|
|
전자부품 데이터시트 검색엔진 |
|
HT45F3W 데이터시트(PDF) 147 Page - Holtek Semiconductor Inc |
|
|
|||||||||||||||||||||||||||||
HT45F3W 데이터시트(HTML) 147 Page - Holtek Semiconductor Inc |
|
|
147 / 167 page  Rev. 1.50 14� De�e��e� 01� �01� Rev. 1.50 147 De�e��e� 01� �01� HT45F3W R-Type Blood Pressure Meter Flash MCU HT45F3W R-Type Blood Pressure Meter Flash MCU TherequirementtolimittheDCvoltagetozeroandtocontrolasmanypixelsaspossiblewith aminimumnumberofconnections,requiresthatbothatimeandamplitudesignalisgenerated andappliedtotheapplicationLCD.Thesetimeandamplitudevaryingsignalsareautomatically generatedbytheLCDdrivercircuitsinthemicrocontroller.Whatisknownasthedutydetermines thenumberofcommonlinesusedwhicharealsoknownasbackplanesorCOMs.Theduty,which ischosenbytwocontrolbitsDTYC1andDTYC0tohaveavalueof1/4,1/6and1/8,andwhich equatestoaCOMnumberof4,6and8,thereforedefinesthenumberoftimedivisionswithineach LCDsignalframe.Twotypesofsignalgenerationarealsoprovided,knownasTypeAandType B,therequiredtypeisselectedviatheTYPEbitintheLCDCTRLregister.TypeBofferslower frequencysignals,howeverlowerfrequenciesmayintroduceflickeringandinfluencedisplayclarity. LCD Voltage Source and Biasing ThetimeandamplitudevaryingsignalsgeneratedbytheLCDDriverfunctionrequirethegeneration ofseveralvoltagelevelsfortheiroperation.ThedeviceonlyhasRtypebiasing.ForRtypebiasing aninternalLCDvoltagesource,VLCDissuppliedtogeneratetheinternalbiasingvoltages.The VLCDvoltagecanbeselectedtohavearangebetween3Vand4.5V,instepsof0.1V,usingthe VLCD0~VLCD3bitsintheVLCDCregister.Forthe1/3biasselection,fourvoltagelevelsVSS,VA, VBandVCareutilised.ThevoltageVAisequaltoVLCD,VBisequaltoVLCDx2/3whileVCisequal toVLCDx1/3.Forthe1/4biasselection,fourvoltagelevelsVSS,VA,VB,VCandVDareutilised.The voltageVAisequaltoVLCD,VBisequaltoVLCDx3/4,VCisequaltoVLCDx1/2,whileVDisequal toVLCDx1/4.Inadditiontoselecting1/3or1/4bias,severalvaluesofbiasresistorcanbechosen usingbitsintheLCDCTRLregister.Differentvaluesofinternalbiasresistorscanbeselectedusing theRSEL0andRESEL1bitsintheLCDCTRLregister. ThisalongwiththevalueofVLCDwilldeterminethebiascurrent. VA (=VLCD) VB (=VLCD × �/3) VC (=VLCD × 1/3) VA (=VLCD) VB (=VLCD × 3/4) VC (=VLCD × �/4) VD (=VLCD × 1/4) LCD On/Off LCD On/Off R type 1/3 Bias R type 1/4 Bias R R R R R R R Bias Voltage Generation |
|
링크 URL |
| ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크 투 데이터시트 | 링크교환 | 제조사별 검색 All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Korean ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
