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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT66F4530 데이터시트(PDF) 176 Page - Holtek Semiconductor Inc |
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HT66F4530 데이터시트(HTML) 176 Page - Holtek Semiconductor Inc |
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176 / 224 page  Rev. 1.00 17� De�e��e� �1� �01� Rev. 1.00 177 De�e��e� �1� �01� HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers Voice D/A Converter – HT66F4550 TheHT66F4550devicecontainsafullyintegrated16-bitVoiceD/Aconvertercircuitcompletewith bufferoutputtogetherwithanoperationalamplifier,whichcanbeusedforaudioapplication.Its referencecomesfromanalogsupplyonly,andcanbepowerdowntosavepower.The16-bitD/A Converterisgoodforvoiceoraudioapplication.AlthoughthisD/AConverterisnotgeneralone-to- onedigitaltoanalogconversion,itprovidesnotbadandsameaudioqualitynomatterwhatsmallor bigvoice.Finally,D/AConvertervoltageisamplifiedandbufferoutputbytheoperationalamplifier. OPAMP DACO D[15:0] DACEN + - RR 1�-�it Voi�e D/A Conve�te� Voice D/A Converter Block Diagram Voice D/A Converter Control Registers TheoverallvoiceD/AConverterfunctioniscontrolledusingseveralregisters.TheDACCregisteris usedtocontroltheD/AConverterfunctionenableordisable.TheDAHandDALregisterpairexists tostorea16-bitwidevoicedata. DAH Register Bit 7 6 5 4 3 2 1 0 Na�e D15 D14 D13 D1� D11 D10 D9 D8 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit7~0 D15~D8:16-bitVoiceD/AConverterdatahighbyte The16-bitVoiceD/AConverterDatalowbyteregister,knownasDAL,shouldfirst bemodifiedandthenfollowedbytheDAHregistermodification.Eachtimewhenthe DAHregisteriswritten,thewhole16-bitdatawillbeloadedintotheD/Aconverter andaconversioncyclewillbeinitiated.NotethattheD/Aconvertershouldfirstbe enabledbeforetheD/Adataisupdated. DAL Register Bit 7 6 5 4 3 2 1 0 Na�e D7 D� D5 D4 D3 D� D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit7~0 D7~D0:16-bitVoiceD/AConverterdatalowbyte WritingthisregisterwillonlywritethedatatotheshadowbufferandwritingtheDAH registerwillsimultaneouslycopytheshadowbufferdatatotheDALregister.Note thattheD/AconvertershouldfirstbeenabledbeforetheD/Adataisupdated. |
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