Logic & Juya Flops-SN74LVC74APWR

Juyawa-FlopkumaLatchna'urorin lantarki ne na yau da kullun tare da tabbatattun jihohi guda biyu waɗanda za a iya amfani da su don adana bayanai, kuma juzu'i ko latch ɗaya na iya adana bit 1 na bayanai.

Flip-Flop (An rage shi da FF), kuma aka sani da ƙofar bistable, kuma aka sani da bistable flip-flop, da'irar dabaru ce ta dijital wacce za ta iya aiki a cikin jihohi biyu.Juyawa-flops suna kasancewa a cikin jiharsu har sai sun sami bugun bugun jini, wanda kuma aka sani da jan hankali.Lokacin da aka karɓi bugun bugun jini, fitarwar juzu'i yana canza yanayi bisa ga ƙa'idodi sannan ya kasance a cikin wannan yanayin har sai an sami wani abin tayar da hankali.

Latch, mai kula da matakin bugun jini, yana canza yanayi a ƙarƙashin matakin bugun bugun agogo, latch yanki ne mai haɓaka matakin ma'auni, kuma aikin ajiyar bayanai ya dogara da matakin ƙimar siginar shigarwa, kawai lokacin da latch ɗin yana cikin kunna jihar, fitarwa zai canza tare da shigar da bayanai.Latch ya bambanta da flip-flop, ba latching data ba ne, siginar a wurin fitarwa yana canzawa tare da siginar shigarwa, kamar siginar da ke wucewa ta cikin buffer;da zarar siginar latch ɗin ta yi aiki azaman latch, ana kulle bayanan kuma siginar shigarwa ba ta aiki.Ana kuma kiran latch a fili, wanda ke nufin cewa abin da ake fitarwa yana bayyana a fili ga abin da aka shigar lokacin da ba a kulle shi ba.

Bambanci tsakanin latch da flip-flop
Latch da flip-flop sune na'urorin ajiya na binary tare da aikin ƙwaƙwalwar ajiya, waɗanda ɗaya ne daga cikin na'urori masu mahimmanci don tsara da'irar dabaru daban-daban.Bambancin shine: latch yana da alaƙa da duk siginar shigarwa, lokacin da siginar shigarwa ta canza latch, babu tashar agogo;Agogo yana sarrafa flip-flop, kawai lokacin da agogon ya kunna don samfurin shigarwar yanzu, yana haifar da fitarwa.Tabbas, saboda duka latch da flip-flop dabaru ne na lokaci, fitarwar ba wai kawai tana da alaƙa da shigarwar yanzu ba, har ma tana da alaƙa da fitarwar da ta gabata.

1. Latch yana haifar da matakin, ba sarrafa aiki tare ba.Ana jawo DFF ta gefen agogo da sarrafa aiki tare.

2. Latch yana kula da matakin shigarwa kuma yana shafar jinkirin wayoyi, don haka yana da wuya a tabbatar da cewa fitarwa ba ta samar da burrs;DFF ba ta da yuwuwar samar da burrs.

3, Idan kun yi amfani da da'irori na ƙofar don gina latch da DFF, latch yana cinye albarkatun ƙofar ƙasa fiye da DFF, wanda shine mafi kyawun wuri don latch fiye da DFF.Don haka, haɗin yin amfani da latch a cikin ASIC ya fi DFF girma, amma akasin haka shine gaskiya a FPGA, saboda babu daidaitattun nau'in latch a FPGA, amma akwai naúrar DFF, kuma LATCH yana buƙatar LE fiye da ɗaya don ganewa.latch ne matakin jawowa, wanda yayi daidai da samun damar kunnawa, kuma bayan kunnawa (a lokacin matakin kunnawa) yayi daidai da waya, wanda ke canzawa tare da fitarwa ya bambanta da fitarwa.A cikin yanayin da ba a kunna shi ba shine kiyaye siginar asali, wanda za'a iya gani da bambanci, a zahiri, sau da yawa latch ba shine madadin ff.

4, latch zai zama mai sarƙaƙƙiya mai rikitarwa bincike lokaci.

5, a halin yanzu, ana amfani da latch ne kawai a cikin da'irar mai girma, kamar intel's P4 CPU.FPGA tana da latch unit, za'a iya saita na'urar rajista a matsayin naúrar latch, a cikin xilinx v2p manual za'a saita shi azaman rijista/latch unit, abin da aka makala shine xilinx half yanki tsarin zane.Sauran samfura da masana'antun FPGA ba su je duba ba.--Da kaina, Ina tsammanin xilinx zai iya daidaitawa da altera na iya zama mafi matsala, zuwa wasu LE don yin, duk da haka, ba na'urar xilinx kowane yanki za a iya daidaita shi ba, Altera's only DDR interface yana da naúrar latch na musamman, gabaɗaya kawai. Za a yi amfani da da'ira mai sauri a cikin ƙirar latch.Altera's LE ba tsarin latch bane, kuma bincika sp3 da sp2e, da sauran waɗanda ba a bincika ba, littafin ya ce ana tallafawa wannan tsarin.Maganar wangdian game da altera daidai ne, altera's ff ba za a iya saita shi zuwa latch ba, yana amfani da tebur mai dubawa don aiwatar da latch.

Ka'idar ƙira ta gabaɗaya ita ce: guje wa ɗaki a yawancin ƙira.zai baka damar tsara lokacin da aka gama, kuma yana da ɓoye sosai, wanda ba tsohon soja ba zai iya samu.latch babban haɗari ba shine tace burrs ba.Wannan yana da matuƙar haɗari ga mataki na gaba na kewaye.Don haka, idan dai za ku iya amfani da wurin flip-flop D, kada ku yi amfani da latch.