Logic & Flip Flops-SN74LVC74APWR

Flip-FlopuyeLatchmidziyo yemagetsi yedhijitari ine mbiri yakagadzikana iyo inogona kushandiswa kuchengetedza ruzivo, uye imwe flip-flop kana latch inogona kuchengeta 1 bit yeruzivo.

Flip-Flop (Yakapfupikiswa seFF), inozivikanwawo segedhi rinogadzika, rinozivikanwawo sebistable flip-flop, idhijitari logic circuit inogona kushanda mumatunhu maviri.Flip-flops inoramba iri munzvimbo yavo kudzamara vagamuchira pulse yekupinda, inozivikanwawo sechinhu chinokonzeresa.Kana pulse yekupinza yagamuchirwa, iyo flip-flop inobuda inoshandura mamiriro zvichienderana nemirairo uye yobva yaramba irimo kusvika imwe trigger yagamuchirwa.

Latch, inonzwa kune iyo pulse level, inoshandura mamiriro pasi peyero yewachi pulse, latch idanho-yakakonzeresa yekuchengetedza unit, uye chiito chekuchengetedza data chinoenderana nehuwandu hwehuwandu hwechiratidzo chekuisa, chete kana latch iri mukati. gonesa nyika, zvinobuda zvichachinja nekuisa data.Latch yakasiyana neflip-flop, haisi latching data, chiratidzo pane chinobuda chinoshanduka nechiratidzo chekupinza, sezvinongoita chiratidzo chinopfuura nepakati;kana chiratidzo chelatch chichiita sechitsiko, data yakavharwa uye chiratidzo chekuisa hachishande.Latch inodaidzwa zvakare kuti transparent latch, zvinoreva kuti inobuda inobuda pachena kune inopinza kana isina kusungirirwa.

Musiyano uripo pakati pe latch uye flip-flop
Latch uye flip-flop ibhinari yekuchengetedza michina ine ndangariro basa, inova imwe yeakakosha maturusi kuumba akasiyana-siyana logic maseketi.Musiyano ndewekuti: latch inoenderana neayo ese masaini masaini, kana iyo yekuisa chiratidzo ichichinja latch shanduko, hapana wachi terminal;flip-flop inodzorwa newachi, chete kana wachi ichinge yatanga kuenzanisa yazvino inopinza, gadzira inobuda.Ehe, nekuti ese ari maviri latch uye flip-flop inguva yekumisikidza, iyo inobuda haina hukama chete neyazvino yekupinda, asi zvakare ine chekuita neyakapfuura yakabuda.

1. latch inokonzeresa nelevel, kwete synchronous control.DFF inokonzereswa newachi mupendero uye synchronous control.

2, latch inonzwa kune yekupinda nhanho uye inobatwa nekunonoka kwe wiring, saka zvakaoma kuona kuti iyo inobuda haibudisi maburrs;DFF haina mukana wekugadzira mabhura.

3, Kana iwe ukashandisa magedhi maseketi kuvaka latch uye DFF, latch inoshandisa mashoma gedhi zviwanikwa pane DFF, inova nzvimbo yepamusoro yelatch pane DFF.Naizvozvo, kubatanidzwa kwekushandisa latch muASIC kwakakwira kupfuura DFF, asi zvakapesana ndezvechokwadi muFPGA, nekuti hapana yakajairwa latch unit muFPGA, asi kune DFF unit, uye LATCH inoda inodarika imwe LE kuti iitwe.latch idanho rakakonzeresa, iro rakaenzana nekuva nekugonesa kupera, uye mushure mekuita activation (panguva yekugonesa nhanho) yakaenzana newaya, iyo inoshanduka neIyo inobuda inosiyana nezvakabuda.Munzvimbo isina-inogoneswa ndeye kuchengetedza chiratidzo chepakutanga, chinogona kuoneka uye flip-flop musiyano, chokwadi, kazhinji latch haisi inotsiva ff.

4, latch ichava yakanyanya kuomarara static nguva yekuongorora.

5, pari zvino, latch inongoshandiswa mudunhu repamusoro-soro, senge intel's P4 CPU.FPGA ine latch unit, iyo register unit inogona kugadziridzwa seye latch unit, mune xilinx v2p bhuku ichagadziriswa serejista / latch unit, chinongedzo chiri xilinx hafu yechidimbu chimiro dhizaini.Mamwe mamodheru nevagadziri veFPGAs havana kuenda kunotarisa.--Ini pachangu, ndinofunga xilinx inokwanisa kuenderana zvakanangana nealtera inogona kunge iri dambudziko rakawanda, kune mashoma LE kuita, zvisinei, kwete xilinx mudziyo chidimbu chega chega chinogona kugadzirwa, altera's chete DDR interface ine yakakosha latch unit, kazhinji chete. high-speed circuit ichashandiswa mukugadzira latch.altera's LE haisi latch dhizaini, uye tarisa iyo sp3 uye sp2e, uye zvimwe kuti usatarise, bhuku rinoti gadziriso iyi inotsigirwa.Izwi rekuti wangdian nezve altera rakarurama, altera's ff haigone kugadziridzwa kuti iite latch, inoshandisa tafura yekutarisa kushandisa latch.

Iyo general dhizaini mutemo ndeiyi: dzivisa latch mune akawanda magadzirirwo.ichaita kuti iwe ugadzire nguva yapera, uye yakavanzika kwazvo, isiri-veteran haigone kuwana.latch njodzi huru haisi yekusefa maburrs.Izvi zvine njodzi zvakanyanya kune inotevera nhanho yedunhu.Naizvozvo, chero uchigona kushandisa D flip-flop nzvimbo, usashandise latch.