飞思卡尔单片机 芯片特征介绍及解密

dsp560芯片解密是我们在飞思卡尔系列ic解密研究中的一个典型解密实例，为方便需求者能够更好的理解单片机加解密原理，这里我们提供对dsp560单片机的基本性能特征介绍，供客户及工程师参考借鉴。

?speed

thedsp560isamemberofmotorola’sfamilyofhcmos,low-power,generalpurposedigitalsignalprocessors.thedsp560features512wordsoffullspeed,on-chipprogramram(pram)memory,two256worddatarams,twopreprogrammeddataroms,andspecialon-chipbootstraphardwaretopermitconvenientloadingofuserprogramsintotheprogramram.itisanoff-the-shelfpartsincetheprogrammemoryisuserprogrammable.thecoreoftheprocessorconsistsofthreeexecutionunitsoperatinginparallel—thedataalu,theaddressgenerationunit,andtheprogramcontroller.thedsp560hasmcu-styleon-chipperipherals,programanddatamemory,aswellasamemoryexpansionport.thempu-styleprogrammingmodelandinstructionsetmakewritingefficient,compactcode,straightforward.thehighthroughputofthedsp560makesitwellsuitedforcommunication,high-speedcontrol,numericprocessing,computerandaudioapplications.

at15millioninstructionspersecond(mips)witha33mhzclock,thedsp560canexecutea14pointcomplexfastfouriertransformin98milliseconds(66,240clockcycles).

thedatapathsare24bitswidetherebyproviding144dbofdynamicrange;intermediateresultsheldinthe56-bitaccumulatorscanrangeover336db.

thedataalu,addressarithmeticunits,andprogramcontrolleroperateinparallelsothataninstructionprefetch,a24x24-bitmultiplication,a56-bitaddition,twodatamoves,andtwoaddresspointerupdatesusingoneofthreetypesofarithmetic(linear,modulo,orreversecarry)canbeexecutedinasingleinstructioncycle.thisparallelismallowsafourcoefficientinfiniteimpulseresponse(iir)filtersectiontobeexecutedinonlyfourcycles,thetheoreticalminimumforasinglemultiplierarchitecture.

?integration

inadditiontothethreeindependentexecutionunits,thedsp560hassixon-chipmemories,threeon-chipmcustyleperipherals(serialcommunicationinterface,synchronousserialinterface,andhostinterface),aclockgeneratorandsevenbuses(threeaddressandfourdata),makingtheoverallsystemfunctionallycompleteandpowerful,butalsoverylowcost,lowpower,and

?invisiblepipeline

thethree-stageinstructionpipelineisessentiallyinvisibletotheprogrammerthusallowingstraightforwardprogramdevelopmentineitherassemblylanguageorahigh-levellanguagesuchasansic.

?instructionset

the62instructionmnemonicsaremcu-likemakingthetransitionfromprogrammingmicroprocessorstoprogrammingthedsp560digitalsignalprocessoraseasyaspossible.theorthogonalsyntaxsupportscontroloftheparallelexecutionunits.thissyntaxprovides12,8,830differentinstructionvariationsusingthe62instructionmnemonics.theno-overheaddoinstructionandtherepeat(rep)instructionmakewritingstraight-linecodeobsolete.

?dsp56000/dsp560

thedsp560isidenticaltothedsp56000exceptthatithas512x24-bitsofon-chipprogramraminsteadof75kofprogramrom;a32x24-bitbootstrapromforloadingtheprogramramfromeitherabyte-widememorymappedromorviathehostinterface;andtheon-chipxandydataromshavebeenpreprogrammedaspositivemu-anda-lawtolinearexpansiontablesandafull,fourquadrantsinewavetable,respectively.

?lowpower

asacmospart,thedsp560isinherentlyverylowpower;however,threeotherfeaturescanreducepowerconsumptiontoanexceptionallylowlevel.

—thewaitinstructionshutsofftheclockinthecentralprocessorportionofthedsp560.

—thestopinstructionhaltstheinternaloscillator.

—powerincreaseslinearly(approximately)withfrequency;thus,reducingtheclockfrequencyreducespowerconsumption

基于dsp560单片机的以上特点，芯片解密中心能在短时间内为您完成dsp560芯片解密等疑难型单片机解密服务。如果您有dsp560单片机解密或其他freescale芯片解密需求，欢迎来电来访咨询洽谈。

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