D-jawowa: manufa na aiki, teburin gaskiya

Trigger wani abu ne mai mahimmanci wanda yake da na'ura mai dijital tare da jihohin tsaro guda biyu, ɗaya daga cikinsu aka sanya darajar "1", kuma ɗayan an sanya "0".

A Hanyar ganin na ma'ana sadarwa bambanta da wadannan iri na'urorin: T-jefa-Flop, D-jefa-Flop, JK-jefa-Flop, RS-triggers. A halin yanzu, a nan an tsara sunayen zaɓuɓɓuka na kowa, amma ban da su akwai na'urorin atomatik na sauran nau'ikan.

A wannan labarin zamu bincika D-faɗakarwa. Na'urar yana da bayanai guda ɗaya (D), saboda haka an tsara shi don aiwatar da aikin jinkirin lokaci.

Mahimmin aiki

A halayyar lissafi Q _{(t + 1)} = dt bayyana aiki na da irin wannan na'urar, kamar D-jefa-Flop. A gaskiya tebur (Table mi) domin wannan jiha inji aka nuna a kasa.

Kamar yadda ka gani, a jere na farko da na huɗu, dabi'u na alamar Q a lokuta na t t da t + 1 sun dace. Wato, D-flip-flop wani kashi ne na jinkirin sigina. A sakamakon haka, na'urori masu la'akari da nau'ikan asynchronous basu samo aikace-aikacen su ba, tun da fitowar zai sake maimaita siginar shigarwa tare da jinkirin jinkiri.

D-samfurin jigilar haɗin ginin yana samuwa ne daga matakan RS-guda (guda-mataki) da nau'i-nau'i na biyu (nau'i biyu) na RS-nau'in nau'in. Ayyukan da aka ambata na atomatik bisa ga shimfiɗa matakan.

Za a iya kashe guda ɗaya a D-flip-flop daga wani na'urar RS-synchronous guda daya da daya AND-HE1 wanda ya haɗu da nau'in haɓaka guda biyu na D-flip-flop zuwa guda ɗaya (D) shigarwa.

A samu wata dabaru sifili a kan Agogon shigar RS irin atomatik dabaru-daya matakin katange da abubuwa jimloli AND-NO ₂ da kuma AND-NO _3. Lokacin da canza Daidaita alama matakin amfani da data shigar, ko Halicci ma'ana sifili a shigar S (a D = 1) ko a shigar da R (tare da D = 0) da asynchronous jawo T. Yana zai canzawa zuwa jihar m ga ma'ana matakin D. aya, D-type farar jinkirta yaduwar shigarwa don lokacin hutawa tsakanin siginar aiki tare.

D-faɗakarwa tare da sarrafawa mai ƙarfi. Bayyana aikin, aikin zane

Ana amfani da irin wannan na'urar ta atomatik daga nau'in RS-triggers na nau'in asynchronous. An gina su a kan abubuwa NAND, tare da biyu daga cikinsu suna yin aikin gyaran, kuma na uku shine fitarwa. Ana tsara siginonin fitarwa na masu tayar da hanyoyi don sarrafa maɓallin fitarwa.

A matakin siginar C daidai da zero na mahimmanci, haɗakarwa ta haɗin sakonni ya shiga cikin abubuwan da aka haifar da fitarwa kuma yana sauya zuwa yanayin ajiya. Lokacin da siginar siginar ya sauya, maɓallin sauyawa ya shiga cikin yanayin jiran aiki, kuma da zarar siginar zuwa siginar mahimmanci ya zo a lokacin shigar da shigarwa na maɓallin C, an saita na'ura ta atomatik zuwa wani sabon tsarin wanda ya dace da siginar bayanin a cikin shigarwar D a cikin zagayowar agogon baya.

Idan sauyawa a matakin siginar bayanin ya auku a lokacin da aka kafa flip-flop na kayan sarrafawa, to, sabobin tuba ba zasu rasa alamar ba. Ya nuna cewa manufar sauya triggers shi ne karɓar sakonnin bayanai, canza su zuwa shigar da na'urar sarrafawa a lokacin sauyawa na siginar a cikin shigarwar shigar C ta hanyar zane mai mahimmanci zuwa siginar mahimmanci da kuma cirewa daga aiki na sigina a shigarwar bayanai.