标签: 时钟设计
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本文在讨论传统时钟设计面临的难点的基础上，引入了一种数模混合的高集成度的时钟系统芯片-LatticeispClockManager5500系列。……
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Typicalembeddedcontrolapplicationsplacedemandssuchaslowpowerconsumption,smallsize,lowcostandreducedcomponentcountontothemicrocontroller.Thisapplicationnoteimplementsa24-hourdigitalclock,alarmand99minute59secondcountdowntimer,yetoperatesontwo“AA”batteries.ThePIC16C54Aisperfectforthisapplication,duetoit’ssmallsize,highcurrentI/OswithdirectLEDdrive,lowcost,fastinstructionthroughputandlowfrequency/cur-rentoperation.AN615ClockDesignUsingLowPower/CostTechniquesClocksystemAuthor:JohnDayA32.768kHzcrystalwaschosenfortheclockduetoSr.,FieldApplicationEngineer,Bostonthelowpowerandcostrequirementsofthisdesign.Thefourinternalphasesofthisinputclockcreateaninter-INTRODUCTIONnalinstructioncycle.Therefore,theinstructiontimeis……
