I-T-trigger. Isimiso sokusebenza, imidwebo esebenzayo

I-Trigger - idivayisi elula, engumshini wedijithali. Unamazwe amabili okuzinza. Enye yalezi zizwe inikezwa inani "1", nelinye "0". Isimo sedivayisi, kanye nenani lolwazi olubanjwe kanambambili elondolozwe kuyo, lithathwa yizibonakaliso eziphumayo: eziqondile futhi eziphambene. Uma kunjalo lapho kutholakala khona amandla okukhishwa, okuhambisana neyunithi enengqondo, isimo se-trigger sibizwa ngokuthi singashadile (okusemandleni okukhipha okuhambisanayo kufana ne-zero enengqondo). Uma kungekho okusemandleni ekukhiqizeni okuqondile, isimo se-trigger sibizwa ngokuthi i-zero.

Hlunga izimbangela ngezindlela ezilandelayo:

1. Ngendlela yokwaziswa okurekhodiwe (i-asynchronous ne-synchronous).

2. Ngendlela yokuphathwa kolwazi (izibalo, ezinamandla, isiteleka esisodwa, isigaba esiningi).

3. Ngendlela yokuqaphela ukuxhumana okunengqondo (i-JK-flip-flop, i-RS-flip-flops, i-T-flip-flop, i-D-flip-flop nezinye izinhlobo).

Imingcele eyinhloko yazo zonke izinhlobo zokubangela yilezi: ubude obuningi besignali yokufaka, isikhathi sokulibaziseka okudingekayo ukuze ushintshe i-trigger, futhi uvumele isikhathi sokuphendula.

Kulesi sihloko, ake sikhulume ngalolu hlobo lwedivayisi, njenge-T-trigger. Izinto ezinjalo zinokufaka ulwazi olulodwa kuphela (T), okubizwa ngokuthi ukufaka okuningi. Ishintsha isimo sayo ngemuva kokufaka okokufaka kokulinganisa (T) kwesignali ngayinye yokulawula.

Ngokusho kwetafula lokuguquguquka, umthetho wokusebenza kwalezo zimbangela uchazwa yi-equation yesici: Q (t + 1) = Awuyi-TTQt. Kulandela ukulinganisa ukuthi uma i-zero enengqondo ifika ekufakeni (T), i-T-trigger izogcina isimo sayo, futhi ishintshe okuhlukile lapho kusetshenziswe okunengqondo.

Kungabonakala kusukela etafuleni ukuthi i-T-flip-flop yenza umsebenzi wokungezelela, lokhu kwenza ukuba igama le-flip-flop elinjalo libe khona, ulwazi lwayo (T) lokufakwayo luyi-input countable. Izinga lesibonakaliso ekufakweni kwe-trigger elinjalo livela kabili kaningi njengalokhu kukhishwa kwalo (Q). Ngakho-ke, i-T-flip-flop isetshenziselwa njengendlela yokwahlukanisa imvamisa.

U-T-trigger wohlobo olunamathemikhali lungakhiwa ngesisekelo se-RS flip-flop yesigaba esinezixhumi ezengeziwe ngokuxhumana, okungukuthi: ukukhishwa kwe-flip-flop (Q) kufanele kuxhumeke ekufakweni (R), kanye nokukhipha (Q ') ekufakweni (S). Ulwazi lokufaka ulwazi (T) luzoba okokufaka okuhambisanayo (C).

Isithombe sibonisa i-T-trigger. Uhlelo lokusebenza.

Esikhathini sokuqala, izinga lezinga le-zero liqondiswa emibhalweni yolwazi lwe-trigger (R no-S), uma kusetshenziswa i-zero enengqondo ekufakeni kokubala (T), isimo sokuqala sokuqala sizokopishwa ngaso sonke isikhathi nge-trigger yesibili, ngoba into ye-NAND izokhipha izinga elilinganayo leyunithi ukuze Ukufakwa kwe-trigger yesibili. Uma i-T-flip-flop isesimweni sokubumbana, khona-ke izimpendulo (R no-S) zizonikwa ngezinga le-zero kanye nobunye, ngokulandelana. Uma isibonakaliso sokuqala sifika ekufakweni kokubala kweyunithi eqondayo, i-unit ehlakaniphile ibhalwa ekuthomeni kokuqala. Isimo se-trigger yesibili asishintshi, ngoba izinga lezinga le-zero kusukela ekuphumeni kwesango LONYE alivimbeli isimo sawo. Ngemuva kokuthi isisindo sokubala sisusiwe, okokufaka (T) kusethelwe ku-zero, futhi isinyathelo sesibili sishintshela esimweni esisodwa esiqondakalayo.

Esithombeni kukhona i-trigger eyi-synchronous. Uhlelo lokusebenza.

Ama-T-flip-flops angavumelanisiwe asetshenziselwa, uma kunesidingo, ukumelela amandla okulandelana kweyunithi enengqondo ekufakeni kwe-T flip-flop.