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HT45F39 Datasheet(PDF) 59 Page - Holtek Semiconductor Inc |
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HT45F39 Datasheet(HTML) 59 Page - Holtek Semiconductor Inc |
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59 / 102 page  Rev. 1.10 58 July 01, 2016 Rev. 1.10 59 July 01, 2016 HT45F39/HT45F391 Ultrasonic Distance Measurement 8-bit Flash MCU HT45F39/HT45F391 Ultrasonic Distance Measurement 8-bit Flash MCU A/D Converter Theneedtointerfacetorealworldanalogsignalsisacommonrequirementformanyelectronic systems.However,toproperlyprocessthesesignalsbyamicrocontroller,theymustfirstbe convertedintodigitalsignalsbyA/Dconverters.ByintegratingtheA/Dconversionelectronic circuitryintothemicrocontroller,theneedforexternalcomponentsisreducedsignificantlywiththe correspondingfollow-onbenefitsoflowercostsandreducedcomponentspacerequirements. A/D Overview Thedevicescontainamulti-channelanalogtodigitalconverterwhichcandirectlyinterfaceto externalanalogsignals,suchasthatfromsensorsorothercontrolsignalsandconvertthesesignals directlyintoeithera8-bitdigitalvalue. A/ D Co nv er te r AN 0 AN 1 AN 7 A/ D Re fe re nc e Vo lt ag e AD R A/ D Da ta R egi st er s ST AR T EO CB AD OF F V SS A DCK 2 ~A DC K0 f SY S AC E7 ~A CE 0 AC S4 ~A CS 0 SC F Ou t put A/ D Cl oc k VD D AD OF F ¸ 2 N (N =0 ~7 ) VC M Ba n dgap Re fe r enc e A/D Converter Structure A/D Converter Register Description OveralloperationoftheA/Dconverteriscontrolledusingfourregisters.Areadonlyregisterpair existstostoretheADCdata8-bitvalue.Theremainingregistersarecontrolregisterswhichsetup theoperatingandcontrolfunctionoftheA/Dconverter. Register Name Bit 7 6 5 4 3 2 1 0 ADR ADR7 ADR6 ADR5 ADR4 ADR3 ADR2 ADR1 ADR0 ADCR0 Start EOCB ADOFF --- ACS3 ACS2 ACS1 ACS0 ADCR1 ACS4 VBGEN --- --- --- ADCK2 ADCK1 ADCK0 ACERL ACE7 ACE6 ACE5 ACE4 ACE3 ACE2 ACE1 ACE0 A/D Converter Register List |
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