實(shí)驗(yàn)七 觸發(fā)器的仿真

實(shí)驗(yàn)七觸發(fā)器的仿真實(shí)驗(yàn)?zāi)康挠眠壿媹D和VHDL語言設(shè)計(jì)D鎖存器，并進(jìn)行仿真與分析；參看Maxplus中器件7474（邊沿D觸發(fā)器）的邏輯功能，用VHDL語言設(shè)計(jì)邊沿觸發(fā)式D觸發(fā)器，并進(jìn)行仿真與分析。參看Maxplus中器件7476（邊沿JK觸發(fā)器）的邏輯功能，用VHDL語言設(shè)計(jì)邊沿觸發(fā)式JK觸發(fā)器，并進(jìn)行仿真與分析。1D鎖存器（DLatch）實(shí)驗(yàn)設(shè)計(jì)思想使能端EN輸入為1時(shí)，輸出使能端EN輸入為1時(shí)，輸出Q與輸入D值相同；使能端EN輸入為0時(shí)，輸出Q保持不變。實(shí)驗(yàn)原理圖數(shù)據(jù)輸入端D1idiiY''EN[■vcc使能端實(shí)驗(yàn)VHDL源程序LIBRARYIEEE;USEIEEE.STD_LOGIC_1164.ALL;ENTITYex71ISPORT(C,D:INSTD_LOGIC;Q,QN:BUFFERSTD_LOGIC);ENDex71;architecturebhvOFex71ISBEGINPROCESS(C,D,Q)BEGINIF(C='1')THENQ<=D;ELSEQ<=Q;ENDIF;QN<=NOTQ;ENDPROCESS;ENDbhv;實(shí)驗(yàn)波形仿真

End:CA英QBBBBSiaiilationTaveforasSinnil：±tionmode:Timing保MasterTimeBar:7.45nsEnd:CA英QBBBBSiaiilationTaveforasSinnil：±tionmode:Timing保MasterTimeBar:7.45nsPointer:Interval:Start:3ps40.0ns80.0he120.0ile1G0.0ns200.0ile240.0ns280.0ns320.0ns360.0ns400.0ns440.0nsiiiiiiiiiii7.4EK45rLSJ69.87ns62.42ns2?邊沿式D觸發(fā)器(Positive-Edge-TriggeredDFlip-FlopswithPreset,ClearandComplementaryOutputs)實(shí)驗(yàn)設(shè)計(jì)思想INPUTSOUTPUTSPRCLRCLKDQQN01XX1010XX0100XX1（失效）1（失效）11T11011T001110X保持Q保持QN實(shí)驗(yàn)原理圖復(fù)位端，低有效PRNIMPUT??:7OUTPUT數(shù)據(jù)輸入端IhffOT■■:時(shí)鐘端CKLIMP[IT…：復(fù)位端，低有效PRNIMPUT??:7OUTPUT數(shù)據(jù)輸入端IhffOT■■:時(shí)鐘端CKLIMP[IT…：0輸出端>QN清零端,低有^...CLRNIMPUT??:實(shí)驗(yàn)VHDL源程序libraryieee;useieee.std_logic_1164.all;entityex72isport(D,CLK,PR_L,CLR_L:INstd_logic;Q,QN:outstd_logic);endex72;architecturevhbofex72issignalPR,CLR:STD_LOGIC;BEGINprocess(CLR_L,CLR,PR_L,PR,CLK)beginPR<=notPR_L;CLR<=notCLR_L;if(CLRANDPR)='1'thenQ<='1';QN<='1';elsifCLR='1'thenQ<='0';QN<='1';elsifPR='1'thenQ<='1';QN<='0';elsif(CLK'eventandCLK='1')thenQ<=D;QN<=notD;endif;endprocess;endvhb;實(shí)驗(yàn)波形仿真

End:V^ilueEBEL_OA英BPointer:Simulationmode：Timing|恰MasterTimeBar:7.45nsInterval:Start:Dps40.0ns80.0ns120.0ns160.0ns200.0ns240.0ns280.0ns320.0ns360.0ns400.0ns440.0ns480.0nsEnd:V^ilueEBEL_OA英BPointer:Simulationmode：Timing|恰MasterTimeBar:7.45nsInterval:Start:Dps40.0ns80.0ns120.0ns160.0ns200.0ns240.0ns280.0ns320.0ns360.0ns400.0ns440.0ns480.0nsiiiiiiiiiiii7.45rLSA^^^nnnnnmnnmmmmmnmmmmnnnnnmmnnnnnnj7.4EB1.15ns