Impazamo eqhelekileyo 17: Ezi zibonakaliso zebhasi zonke zitsalwa ngabaxhathisi, ngoko ndiziva ndikhululekile.

Isisombululo esihle: Kukho izizathu ezininzi zokuba kutheni imiqondiso kufuneka itsalwe inyuswe, kodwa ayizizo zonke ezifuna ukutsalwa. I-resistor yokutsalwa kunye neyokudonsa idonsa isalathisi esilula, kwaye yangoku ingaphantsi kweshumi le-microamperes, kodwa xa isibonakaliso esiqhutywayo sitsalwa, okwangoku kuya kufikelela kwinqanaba le-milliamp. Inkqubo yangoku ihlala inamasuntswana angama-32 edatha yedilesi nganye, kwaye kunokubakho ukuba i-244/245 yebhasi eyodwa kunye nezinye iimpawu zitsaliwe, iiwatts ezimbalwa zosetyenziso lwamandla ziya kutyiwa kwezi zixhathisi (ungasebenzisi umba we I-80 cents nge-kilowatt-yure ukunyanga ezi watts ezimbalwa zokusetyenziswa kwamandla, isizathu siphantsi Jonga).

Impazamo eqhelekileyo ye-18: Inkqubo yethu inikwe amandla yi-220V, ngoko akuyomfuneko ukuba sikhathalele ukusetyenziswa kwamandla.

Isisombululo esihle: uyilo lwamandla aphantsi alugcini nje ukugcina amandla, kodwa kunye nokunciphisa iindleko zeemodyuli zamandla kunye neenkqubo zokupholisa, kunye nokunciphisa ukuphazamiseka kwemitha ye-electromagnetic kunye nengxolo ye-thermal ngenxa yokunciphisa okwangoku. Njengoko ukushisa kwesixhobo kuncipha, ubomi besixhobo bukwandiswa ngokuhambelana (ubushushu bokusebenza kwesixhobo se-semiconductor buyanda ngama-degrees angama-10, kwaye ubomi bufutshane ngesiqingatha). Ukusetyenziswa kwamandla kufuneka kuthathelwe ingqalelo nangaliphi na ixesha.

Impazamo eqhelekileyo ye-19: Ukusetyenziswa kwamandla kwezi chips ezincinci kuphantsi kakhulu, ungakhathazeki ngayo.

Isisombululo esihle: Kunzima ukumisela ukusetyenziswa kwamandla kwi-chip yangaphakathi engekho nzima kakhulu. Ikakhulu igqitywe ngokukhoyo kwiphini. I-ABT16244 idla ngaphantsi kwe-1 mA ngaphandle komthwalo, kodwa isalathisi sayo yipini nganye. Iyakwazi ukuqhuba umthwalo we-60 mA (njengokufanisa ukuchasana kwamashumi e-ohms), oko kukuthi, ukusetyenziswa kwamandla obuninzi bomthwalo ogcweleyo kunokufikelela kwi-60 * 16 = 960mA. Ngokuqinisekileyo, kuphela umbane wamandla okhoyo mkhulu kakhulu, kwaye ubushushu buwela kumthwalo.

Impazamo eqhelekileyo i-20: Indlela yokujongana nala mazibuko e-I / O angasetyenziswanga e-CPU kunye ne-FPGA? Ungayishiya ingenanto kwaye uthethe ngayo kamva.

Isisombululo esihle: Ukuba amazibuko e-I/O angasetyenziswanga ashiywe edadayo, anokuba ngokuphindaphindiweyo oscillating imiqondiso yongeniso kunye nokuphazamiseka okuncinci okuvela kwihlabathi langaphandle, kunye nokusetyenziswa kwamandla kwezixhobo ze-MOS ngokusisiseko kuxhomekeke kwinani lee-flips zesekethe yesango. Ukuba itsaliwe, iphini ngalinye liya kuba ne-microampere yangoku, ngoko ke eyona ndlela ingcono kakhulu kukuyibeka njengemveliso (ewe, akukho miqondiso yokuqhubela phambili inokudityaniswa ngaphandle).

I-Mistake eqhelekileyo 21: Kukho iingcango ezininzi ezishiyekileyo kule FPGA, ngoko unokuyisebenzisa.

Isisombululo esihle: Ukusetyenziswa kwamandla e-FGPA kuhambelana nenani lee-flip-flops ezisetyenzisiweyo kunye nenani le-flips, ngoko ukusetyenziswa kwamandla ohlobo olufanayo lweFPGA kwiisekethe ezahlukeneyo kunye namaxesha ahlukeneyo kunokuba ngamaxesha angama-100 ahlukeneyo. Ukunciphisa inani le-flip-flops ye-high-speed flipping yindlela esisiseko yokunciphisa ukusetyenziswa kwamandla e-FPGA.

Impazamo eqhelekileyo 22: Imemori ineempawu ezininzi zokulawula. Ibhodi yam idinga kuphela ukusebenzisa i-OE kunye ne-WE iimpawu. I-chip ekhethiweyo kufuneka isekelwe, ukwenzela ukuba idatha iphume ngokukhawuleza ngexesha lomsebenzi wokufunda.

Isisombululo esihle: Ukusetyenziswa kwamandla eenkumbulo ezininzi xa ukhetho lwe-chip luvumelekile (kungakhathaliseki i-OE kunye ne-WE) luya kuba ngaphezu kwamaxesha e-100 amakhulu kunokuba ukhetho lwe-chip lungasebenzi. Ngoko ke, i-CS kufuneka isetyenziswe ukulawula i-chip kangangoko kunokwenzeka, kunye nezinye iimfuno kufuneka zifezekiswe. Kunokwenzeka ukunciphisa ububanzi be-chip khetha i-pulse.

Impazamo eqhelekileyo ye-23: Ukunciphisa ukusetyenziswa kwamandla ngumsebenzi wabasebenzi be-hardware, kwaye ayinanto yakwenza nesoftware.

Isisombululo esihle: I-hardware linqanaba nje, kodwa isoftware ngumdlali. Ukufikelela phantse yonke itshiphu ebhasini kunye ne-flip yayo yonke imiqondiso iphantse ilawulwa yisoftware. Ukuba isoftware inokunciphisa inani lofikelelo kwimemori yangaphandle (usebenzisa iinguqu ezininzi zerejista, Ukusetyenziswa okungakumbi kweCACHE yangaphakathi, njl.), impendulo ngexesha elifanelekileyo kwiziphazamiso (iziphazamiso zihlala zisebenza kwinqanaba eliphantsi kunye nezichasi zokutsalwa), kunye nezinye. amanyathelo athile kwiibhodi ezithile zonke ziya kuba negalelo elikhulu ekunciphiseni ukusetyenziswa kwamandla. Ukuze ibhodi ijike kakuhle, ihardware kunye nesoftware kufuneka ibanjwe ngezandla zozibini!

Impazamo eqhelekileyo 24: Kutheni le miqondiso idlula ngaphezulu? Logama nje umdlalo ulungile, unokupheliswa.

Isisombululo esihle: Ngaphandle kweempawu ezimbalwa (ezifana ne-100BASE-T, i-CML), kukho i-overshoot. Logama nje ingenkulu kakhulu, akuyomfuneko ukuba idityaniswe. Nokuba iyahambelana, ayihambelani neyona nto ingcono. Umzekelo, i-impedance ye-output ye-TTL ingaphantsi kwe-50 ohms, kunye ne-20 ohms. Ukuba ukuchasana okukhulu okuhambelanayo kusetyenziswa, okwangoku kuya kuba kukhulu kakhulu, ukusetyenziswa kwamandla akuyi kwamkeleka, kwaye i-amplitude yesignali iya kuba yincinci ukuba ingasetyenziswa. Ngaphandle koko, i-impedance yemveliso yomqondiso jikelele xa ukhupha umgangatho ophezulu kunye nokukhupha umgangatho ophantsi awufani, kwaye kunokwenzeka ukuba ufezekise ukuhambelana okupheleleyo. Ngoko ke, ukuhambelana kwe-TTL, i-LVDS, i-422 kunye nezinye iimpawu zinokwamkeleka ukuba nje ukugqithisa kuphunyeziwe.