RS-Flip-flop. Molao-motheo oa ho sebetsa, mosebetsi litšoantšo, phetoho tafole

Tsosang - e sesebediswa e bonolo ke mochini ditsitithale. Ho na le tse peli tse nang le botsitso naha. E 'ngoe ea maemo ana abetsoe boleng le "1",' me e mong - "0". Thunye boemo, 'me boleng ba boitsebiso boo binary e bolokoa ho eona, ea ka matshwao a medumo khumo ikemiselitse: Direct le inverted. Tabeng ea moo ka ho toba ka 'nang khumo Ho thehoa, e leng tšoana le sa utloahalang e mong, profinseng ea phetlhwang-flop bitsoa unit trust (monyetla ka khumo inverted ke lefela). Ha khumo otlolohileng ha e ka 'nang, moo boemo bo tsosang o bitsoa lefela.

Lintho tse tsosang litakatso tse classified ke likarolo tse latelang:

1. Ka mokhoa oa ho ngola lesedi (synchronous le tshielano).

2. Ha ho tlhahiso leseding taolo (lipalo-palo, matla, le 'ngoe-sethaleng, multistage).

3. E le ho hlokomela tsa dikgokelo utloahalang (JK-phetlhwang-flop, RS-lintho tse tsosang litakatso, T-Triger, D-phetlhwang-flop le mefuta e meng).

The entsprechen o ka sehloohong oa mefuta eohle ea lintho tse tsosang litakatso tse boleng kholo ka ho fetisisa tsa input nako pontšo, ho lieha nako e hlokehang bakeng sa ho switjha ho phetlhwang-flop, le ka ho lumella tshebetso nako.

Sehloohong sena, a re ke re bua mabapi le mofuta ona wa sesebediswa, joalokaha RS-phetlhwang-flop. E le tsa mefuta e 'meli: synchronous le tshielano.

Tshielano RS-phetlhwang-flop na mela e 'meli constructively (R le S) input. sesebediswa sena o sebetsang ho ea ka tafole phetohong eo.

Thibetsoe ho joalo phetlhwang-flop ke motsoako oa matšoao ka ditshwaelo tsa sesebediswa, a etsa hore boemo ba ho se tsitse. motswako Sena se ka bontšoa ka ho ya ka ditlhoko RtSt = 0. Ka fokotsa 'mapa Karnaugh di behilwe molao thunye opereishene, e leng o bitsoa abel bath: Q (sa t + 1) = St V R'tQt. Ka tsela eo RtSt ke lefela.

Ka setshwantshothalo tshebetso bontša RS-phetlhwang-flop tshielano mofuta NAND le tshebetso bobeli ka likarolo kapa.

The mofuta bobeli - synchronous RS-FF. Joalo sesebediswa e ke structurally na tharo ditsenngwateng otlolohileng S, R, le C. The phapang pakeng tsa synchronous le tshielano mofuta phetlhwang-flop ke ho ba teng ha input kamahanyo (C). Ho ke ke ho hlokahala ka mabaka a latelang: hobane ka ditshwaelo le sesebediswa (mabaka elements) matšoao a romeloa hase kamehla ka nako. Sena ke ka ntlha ya go ha e le hantle e le hore ba fete mefuta e fapaneng 'me palo ea nodes hore na le tieho e fapaneng. ketsahalo ena e bitsoa "papali." Ka lebaka la joalo "liketsahalo" pontšo makgabane fumana tla superimposed ka melemo fetileng tsa matšoao tse ling. All ona o isa ho disebedisweng tse ding ba bohata alamo.

ketsahalo ena ka e felisoe ka ho sebelisa input matšoao nako gating sesebediswa. E leng, ka input tsa NAND hekeng ntle ka ho toba lesedi matšoao fuoa linaoa senotlolo kgokahanya, tlhahisoleseding ena nako le matšoao le input na nako ea ho notlela holim'a input ena.

Boemo ka sehloohong bakeng sa tshebetso e nepahetseng ea ho switjha mekhahlelo mabaka ka RS-phetlhwang-flop le tlhalohanyo laoloa ke bona - RT unacceptability tsoa hong bohato kapa bontša St, mochine o switjha, 'me tlhahisoleseding e mabapi le hopola ho tswa khumo Q (sa t + 1) Flip-flop. Tabeng ena, letoto la lihlooho tse ka 'nang na le likarolo feela synchronous.

RS-mofuta phetlhwang-flop synchronous bath emeloang ke abel: Q (sa t + 1) = StCt V R'tQt V QtC't.

photo photo photo photo e bontša le RS-thunye synchronous mofuta NAND. Input AND liheke, SE utloahalang unit trust e fetisoa ho ya data switjha input S kapa R bakeng sa ditsenngwateng hlokahala RS tshielano thaepa latch le input inverted feela ha input ho synchronous (C) pontšo ka sea utloahala kapa che ngoe.