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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT45F5R датащи(PDF) 97 Page - Holtek Semiconductor Inc |
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HT45F5R датащи(HTML) 97 Page - Holtek Semiconductor Inc |
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97 / 138 page  Rev. 1.10 9� De�e��e� 1�� �01� Rev. 1.10 97 De�e��e� 1�� �01� HT45F5R Charger ASSP Flash MCU HT45F5R Charger ASSP Flash MCU Summary of A/D Conversion Steps ThefollowingsummarisestheindividualstepsthatshouldbeexecutedinordertoimplementanA/D conversionprocess. • Step1 SelecttherequiredA/DconversionclockbycorrectlyprogrammingbitsSACKS2~SACKS0in theSADC1register. • Step2 EnabletheA/DconverterbysettingtheADCENbitintheSADC0registerto1. • Step3 SelectwhichsignalistobeconnectedtotheinternalA/Dconverterbycorrectlyconfiguringthe SAINS2~SAINS0bits Selecttheexternalchannelinputtobeconverted,gotoStep4. Selecttheinternalanalogsignaltobeconverted,gotoStep5. • Step4 IftheA/Dconverterinputsignalcomesfromtheexternalchannelinputselectingbyconfiguring theSAINSbitfield,thecorrespondingpinsshouldbeconfiguredasA/Dconverterinputfunction byconfiguringtherelevantpin-sharedfunctioncontrolbits.Thedesiredanalogchannelthen shouldbeselectedbyconfiguringtheSACSbitfield.Afterthisstep,gotoStep6. • Step5 BeforetheA/Dconverterinputsignalisselectedtocomefromtheinternalanalogsignalby configuringtheSAINSbitfield,thecorrespondingexternalinputpinmustbeswitchedtoanon- existedchannelinputbysettingtheSACS3~SACS0bitswithavaluefrom1001to1111.The desiredinternalanalogsignalthencanbeselectedbyconfiguringtheSAINSbitfield.Afterthis step,gotoStep6. • Step6 SelectthereferencevoltagesourcebyconfiguringtheSAVRS1~SAVRS0bitsintheSADC1 register. • Step7 SelectA/DconverteroutputdataformatbysettingtheADRFSbitintheSADC0register. • Step8 IfA/Dconversioninterruptisused,theinterruptcontrolregistersmustbecorrectlyconfigured toensuretheA/Dinterruptfunctionisactive.Themasterinterruptcontrolbit,EMI,andtheA/D conversioninterruptcontrolbit,ADE,mustbothbesethighinadvance. • Step9 TheA/DconversionprocedurecannowbeinitializedbysettingtheSTARTbitfromlowtohigh andthenlowagain. • Step10 IfA/Dconversionisinprogress,theADBZflagwillbesethigh.AftertheA/Dconversion processiscomplete,theADBZflagwillgolowandthentheoutputdatacanbereadfrom SADOHandSADOLregisters. Note:Whencheckingfortheendoftheconversionprocess,ifthemethodofpollingtheADBZbit intheSADC0registerisused,theinterruptenablestepabovecanbeomitted. |
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