Ya kamata a mai da hankali PCB zane

Ra’ayin kuskure 1: Abubuwan buƙatun ƙirar PCB na wannan jirgi ba su da yawa, don haka yi amfani da waya mai sirara da zane na atomatik.

Yi sharhi akan: Wajibi na atomatik dole ne ya mamaye yankin PCB mafi girma, a lokaci guda, sau da yawa fiye da ramin wayoyin hannu, babba a samfuran tsari, farashin masana’anta na PCB la’akari da abubuwan ban da abubuwan kasuwanci, shine faɗin layin da adadin ramuka, wanda ke shafar yawan PCB da yawan adadin bit, adana farashin mai siyarwa, kuma bayar da farashi don nemo dalilin.

Tatsuniya ta 2: Waɗannan siginar bas ɗin ana jan su ta hanyar masu adawa don jin kwanciyar hankali.

Sharhi: Ana buƙatar jan sigina sama da ƙasa saboda dalilai da yawa, amma ba duka ba. Ja juriya don jan sama da ƙasa siginar shigarwa guda ɗaya, halin yanzu yana ƙasa da aman microamps, amma siginar tuƙi, na yanzu zai isa milliamperes, yanzu tsarin galibi shine bayanan adireshin 32-bit, akwai 244/245 bayan warewar bas da sauran sigina, ana ja, ‘yan watts na amfani da wuta akan juriya.

Sharhi: Idan an dakatar da tashar tashar I/O mara amfani, ɗan tsangwama daga waje na iya zama siginar shigarwa na maimaita oscillation, kuma yawan amfani da na’urorin MOS ya dogara da yawan jujjuyawar ƙofa. Idan ka ɗaga shi, kowane fil ɗin zai kuma sami microamperes na yanzu, don haka hanya mafi kyau ita ce saita ta zuwa fitarwa (ba shakka, babu wata siginar da aka kora a waje).

Labari na 4: Akwai ƙofofi da yawa a cikin wannan FPGA, don haka bari mu yi

Sharhi: Amfani da wutar FGPA ya yi daidai da adadin flip-flops da aka yi amfani da su da yawan juye-juye, don haka yawan amfani da ƙirar FPGA iri ɗaya na iya bambanta da sau 100 a cikin da’irori daban-daban a lokuta daban-daban. Rage yawan flip-flops a cikin sauri shine babbar hanyar rage yawan wutar FPGA.

Labari na 5: Amfani da ikon waɗannan ƙananan kwakwalwan kwamfuta ya yi ƙasa sosai don damuwa

Yi sharhi akan: ABT16244 yana cinye ƙasa da 1 ma ba tare da kaya ba, amma jigonsa shine cewa kowane fil yana iya fitar da nauyin 60mA (kamar juriya mai dacewa da dubun ohm), wato, matsakaicin ikon amfani da 60*16 = 960mA a cikakke kaya. Tabbas, kawai saboda ƙarfin wutar yana da ƙarfi sosai don zafin ya faɗi akan kayan.

Labari na 6: Akwai alamun sarrafawa da yawa a cikin ƙwaƙwalwar ajiya, Ina buƙatar kawai amfani da siginar OE da WE akan wannan allon, don bayanan su fito da sauri sosai yayin karantawa.

Sharhi: Amfani da wutar mafi yawan ƙwaƙwalwar ajiya zai fi sau 100 girma lokacin zaɓin guntu yana da tasiri (ba tare da la’akari da OE da WE) fiye da lokacin zaɓin guntu ba, don haka yakamata a yi amfani da CS don sarrafa guntu a duk lokacin da zai yiwu da faɗin guntu. Ya kamata a rage bugun zaɓi har zuwa lokacin da za a cika wasu buƙatun.

Labari na 7: Ta yaya aka gaggauta waɗannan sigina? Muddin wasa ne mai kyau, ana iya kawar da shi

Sharhi: Baya ga wasu takamaiman sigina (kamar 100BASE-T, CML), an cika su sosai, muddin ba babba ba ne, ba lallai ne ya buƙaci daidaita ba, koda kuwa wasan ba shine mafi kyawun wasa ba. Kamar yadda rashin fitowar fitowar TTL ƙasa da 50 ohms, ko ma 20 ohm, idan a cikin irin wannan babban juriyarsu, halin yanzu yana da girma sosai, ba a yarda da ƙarfin wutar lantarki ba, kuma girman siginar zai yi ƙanƙanta don amfani, in ji matsakaicin siginar fitarwa a cikin fitowar babban matakin da ƙarancin ƙarancin fitowar wutar lantarki a lokutan talakawa ba iri ɗaya ba, shima bai dace daidai ba. Sabili da haka, ana iya yarda da daidaiton TTL, LVDS, 422 da sauran sigina muddin an sami nasara.

Labari na 8: Rage amfani da wutar lantarki lamari ne na ma’aikatan kayan masarufi, kuma software ba ta da abin yi.

Yi sharhi akan: Hardware mataki ne kawai, amma wasan kwaikwayon software ne, kusan kowane guntu akan hanyar motar bas, kowane juye siginar kusan software ke sarrafa shi. Idan software na iya rage lokutan samun dama na ƙwaƙwalwar waje (ƙarin amfani da masu canjin rajista, ƙarin amfani da CACHE na ciki, da sauransu), amsawar lokaci don katsewa (katsalandan galibi ƙaramin matakin inganci ne tare da jayayya) da sauran takamaiman matakan don takamaiman allon zai ba da babbar gudummawa ga rage yawan amfani da wutar