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HT46R002 数据表(PDF) 50 Page - Holtek Semiconductor Inc |
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HT46R002 数据表(HTML) 50 Page - Holtek Semiconductor Inc |
50 / 83 page Rev. 1.21 50 April 11, 2017 Rev. 1.21 51 April 11, 2017 HT46R002/HT46R003 Cost-Effective A/D 8-Bit OTP MCU HT46R002/HT46R003 Cost-Effective A/D 8-Bit OTP MCU Analog to Digital Converter Theneedtointerfacetorealworldanalogsignalsisacommonrequirementformanyelectronic systems.However,toproperlyprocessthesesignalsbyamicrocontroller,theymustfirstbe convertedintodigitalsignalsbyA/Dconverters.ByintegratingtheA/Dconversionelectronic circuitryintothemicrocontroller,theneedforexternalcomponentsisreducedsignificantlywiththe correspondingfollow-onbenefitsoflowercostsandreducedcomponentspacerequirements. A/D Overview Thedevicescontaina4-channelanalogtodigitalconverterwhichcandirectlyinterfacetoexternal analogsignals,suchasthatfromsensorsorothercontrolsignalsandconvertthesesignalsdirectly intoeithera12-bitdigitalvalue. TheaccompanyingblockdiagramshowstheoverallinternalstructureoftheA/Dconverter,together withitsassociatedregisters. ¸ 2 (n =0 ~5 ) AC SR R egi st er AD C AD RL AD RH A/ D Da ta R egi st er s PC R0 ~P CR 3 AC S0 ~A CS 1 ST AR T EO CB AD CR R egi st er Pi n Co nf i gur at io n Bi ts C hannel S el ec t Bi ts St ar t Bi t E nd o f Co nv er si on Bi t AD ON B Bi t A/ D En abl e f SY S PA 0/ AN 0 PA 1/ AN 1 PA 2/ AN 2 PA 5/ AN 3 V DD AD ON B it N A/D Converter Structure A/D Converter Data Registers – ADRL, ADRH Thedevices,whichhaveaninternal12-bitA/Dconverter,requiretwodataregisters,ahighbyte register,knownasADRH,andalowbyteregister,knownasADRL.Aftertheconversionprocess takesplace,theseregisterscanbedirectlyreadbythemicrocontrollertoobtainthedigitised conversionvalue.Onlythehighbyteregister,ADRH,utilisesitsfull8-bitcontents.Thelow byteregisterutilisesonly4bitofits8-bitcontentsasitcontainsonlythelowestbitsofthe12-bit convertedvalue. Inthefollowingtable,D0~D11istheA/Dconversiondataresultbits. ADRH, ADRL Register Bit ADRH ADRL 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Name D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 — — — — R/W R R R R R R R R R R R R — — — — POR X X X X X X X X X X X X — — — — “x” unknown Unimplemented,readas“0” D11~D0:ADCconversiondata |
类似零件编号 - HT46R002 |
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类似说明 - HT46R002 |
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