Logic & Flip Flops-SN74LVC74APWR

Phidigu phidigundiLatchndi zida zamagetsi zamagetsi zomwe zili ndi zigawo ziwiri zokhazikika zomwe zitha kugwiritsidwa ntchito kusunga zidziwitso, ndipo flip-flop kapena latch imodzi imatha kusunga chidziwitso cha 1 pang'ono.

Flip-Flop (Yofupikitsidwa ngati FF), yomwe imadziwikanso kuti chipata cha bistable, yomwe imadziwikanso kuti bistable flip-flop, ndi dera la digito lomwe limatha kugwira ntchito m'maboma awiri.Flip-flops amakhalabe m'malo awo mpaka atalandira kugunda kwamphamvu, komwe kumadziwikanso kuti choyambitsa.Pamene phokoso lolowetsa lilandiridwa, kutuluka kwa flip-flop kumasintha malinga ndi malamulo ndipo kumakhalabe komweko mpaka choyambitsa china chilandiridwa.

Latch, tcheru ndi kugunda kwa mtima, kusintha dziko pansi pa mlingo wa kugunda kwa wotchi, latch ndi mlingo-zinayambitsa kusungirako unit, ndipo zochita zosungira deta zimadalira mlingo wa mtengo chizindikiro cholowera, kokha pamene latch ali mu yambitsani state, zotuluka zidzasintha ndi kulowetsa kwa data.Latch ndi yosiyana ndi flip-flop, silatching deta, siginecha pa zotuluka amasintha ndi chizindikiro cholowera, monga chizindikiro chikudutsa buffer;pamene chizindikiro cha latch chimagwira ntchito ngati latch, deta imatsekedwa ndipo chizindikiro cholowetsa sichigwira ntchito.Latch imatchedwanso transparent latch, zomwe zikutanthauza kuti zotulukazo zimawonekera kwa zomwe zalowetsedwa pomwe sizinatsekedwe.

Kusiyana pakati pa latch ndi flip-flop
Latch ndi flip-flop ndi zida zosungirako zamabizinesi zokhala ndi kukumbukira, zomwe ndi zida zoyambira kupanga mabwalo osiyanasiyana owerengera nthawi.Kusiyanitsa ndiko: latch ikugwirizana ndi zizindikiro zake zonse zolowera, pamene chizindikiro cholowetsa chimasintha kusintha kwa latch, palibe mawotchi;flip-flop imayang'aniridwa ndi wotchi, pokhapokha wotchiyo ikayambika kuti iwonetse zomwe zikuchitika, imapanga zotuluka.Zoonadi, chifukwa chakuti latch ndi flip-flop ndi ndondomeko ya nthawi, zomwe zimatuluka sizimangokhudzana ndi zomwe zilipo panopa, komanso zokhudzana ndi zomwe zatulutsidwa kale.

1. latch imayambitsidwa ndi mlingo, osati kuwongolera kofanana.DFF imayambitsidwa ndi m'mphepete mwa wotchi komanso kuwongolera kolumikizana.

2, latch ndi tcheru mlingo athandizira ndipo amakhudzidwa ndi kuchedwa mawaya, choncho n'zovuta kuonetsetsa kuti linanena bungwe si kubala burrs;DFF ndiyocheperako kupanga ma burrs.

3, Ngati mumagwiritsa ntchito mabwalo a zipata kuti mupange latch ndi DFF, latch imagwiritsa ntchito zida zocheperako kuposa DFF, yomwe ndi malo apamwamba kwambiri kuposa DFF.Chifukwa chake, kuphatikiza kogwiritsa ntchito latch mu ASIC ndikwapamwamba kuposa DFF, koma mosiyana ndi FPGA, chifukwa palibe gawo lokhazikika la latch mu FPGA, koma pali gawo la DFF, ndipo LATCH ikufunika kuposa LE kuti izindikirike.latch ndi mlingo woyambitsa, womwe uli wofanana ndi kukhala ndi mapeto otsegulira, ndipo pambuyo poyambitsa (pa nthawi yotsegulira mlingo) ndi ofanana ndi waya, yomwe imasintha ndi Zomwe zimatuluka zimasiyana ndi zomwe zimatuluka.M'malo osaloledwa ndikusunga chizindikiro choyambirira, chomwe chimatha kuwonedwa ndikusiyana, makamaka, nthawi zambiri latch salowa m'malo mwa ff.

4, latch idzakhala yovuta kwambiri kusanthula nthawi.

5, pakadali pano, latch imagwiritsidwa ntchito pamagawo apamwamba kwambiri, monga Intel's P4 CPU.FPGA ili ndi latch unit, gawo lolembetsa litha kukhazikitsidwa ngati latch unit, mu buku la xilinx v2p lidzasinthidwa ngati regista / latch unit, cholumikizira ndi xilinx theka lachidule chagawo.Mitundu ina ndi opanga ma FPGA sanapite kukawona.--Payekha, ndikuganiza kuti xilinx imatha kufananiza ndi altera ikhoza kukhala yovuta kwambiri, kwa LE yochepa kuti achite, komabe, osati chipangizo cha xilinx kagawo kalikonse kakhoza kukhazikitsidwa, mawonekedwe a DDR okhawo ali ndi gawo lapadera la latch, makamaka kokha. dera lothamanga kwambiri lidzagwiritsidwa ntchito popanga latch.altera's LE si mawonekedwe a latch, ndipo yang'anani sp3 ndi sp2e, ndi zina kuti musayang'ane, bukuli likuti kasinthidwe kameneka kamathandizidwa.Mawu akuti wangdian onena za altera ndi olondola, altera's ff sangathe kukhazikitsidwa kuti atseke, amagwiritsa ntchito tebulo loyang'ana kukhazikitsa latch.

Lamulo la mapangidwe ambiri ndi: pewani latch muzojambula zambiri.ikulolani kuti mupange nthawi yatha, ndipo yabisika kwambiri, omwe si msilikali sangapeze.latch choopsa chachikulu si kusefa ma burrs.Izi ndizowopsa kwambiri pamlingo wotsatira wa dera.Chifukwa chake, bola mutha kugwiritsa ntchito D flip-flop place, musagwiritse ntchito latch.