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Selezione Microcontroller incorporato

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1 Introduzione a Embedded System DesignProfessor Dhananjay V. GadreNetaji Subhas University of Technology, New DelhiLecture 8Elements of Microcontroller Ecosystem Continue (Riferimento Slide Time: 00 :35) HereIhavelistedoutqualichechewouldconsideraleondmicrocontrolleredtheywouldberatheryourmicrocontrollalfeatureswhetheritherithasenoughmemoryforyourapplicationwhataboutthepackagingenerausepackagingwouldbeaimportantconsiderazione_isitavailableinthepackagethatyouwantbecauseyouapplication potrebbe non offrire a tanto fisico space.ICareproduceinmanygradesthecommercialgradeisthemostcommongradethisisusedforcommodityconsumerproductstypicallythetemperatureofoperationofsuchICintherangeof0to70degrees, industrialtemperaturerangeishigherthancheautomotiveisevenhigherandmilitarygradecomponentsoperateatmuchwidertemperaturerangesbecausethatiswhatteyaspettarsi in un militare applicazione. Thenyouwouldlookatthecazzeavailtimebutanimportantcomponentissincessionalealeapplicazionealeapplicazioneinarealtimeapplicazionalecheesternaleparametriperatureorinsonosullâtedell†- sullâceslazionedell†- dellâceslazionedell†- disponibilitàdellâtedellâtedellâtedellâtedellâtedellâtedellâtedell†- disponibilità.it.
LetmetaketwoesamplesifIamlookingthetemperatureofthisroomusinganaircondizionioner.IwouldnecessitetemperaturedelloomsoInecessità.necessitàdella_necessitàperaturesensordiaattivitàperaturesensorogninaturesensorognodellaessodellaquestodella_termosiodellodellesulta - iltolookatanapplicationsuchasthenoisecancellingheadphonethenthenoisecancellingapplicationhastwosampleexternalsoundalsoundalsoundalsoundsthemaximumfrequencyofteLink esterno sonoro altoatesamenti.it che. (Fare Slide Time: 02 :40) Così, wemustsample20kilohertzatanappropriatesamplingfrequencyandIhaveillustratedthatherethatthetimebetweentwosampleswecallitintersampleintervalandthiswouldvaryfromapplicationtoapplicationlikeImentionedformeasuringtemperaturetheintersampleintervalwillbeverylargeforsamplingsoundfrequenciesifIamgoingtosample20kilohertzsignalImustsampleitinkeepingwiththesamplingtheoremnyquistrateandIhavetosamplethatsignal almeno due volte la frequenza massima component.Quindi, 20kilohertzsignalasignalwhichhasamaximumfrequencycomponentof20kilohertzmustbesampledat40000timespersecondatleastandsoyouwouldsampleitprobablyat45000samplespersecondwhichmeansthetimebetweentwosamplesisgoingtobelessthanIwould diciamo che questo è di circa 20 micro secondi è giusto? Sì.