Điện Tử - Cơ Sở Thiết Kế Mạch - Design Trên Máy Tính (Phân 2) part 12 potx

end if end process: end Implement 4.

TrOll~ \'f uu ni:ty, t[lt cit c,te till hi¢u vilo ph'l! dU'lK gIll trong danh ~,ich tin hi0u t • \c dl)llg Danh ",\eh tin hi~L1 t,Ie dl)ng ehi ra ril11g, qUii trlnh tfnh to,Ill dang xct ~c du\l"C tllve h!¢n khl e6 SLt' lhay ,I(;i CLla dc lin hll'U ntul1 lrong danh s,ielL

D~ 1l1() til n1<.leh ll)gic td h0p dc bien v: tin hi011 troug 1ll()1 qU;! 11"lnl1

process kh(mg chfq'e nh;1Il gi,i 11"i g;!n kh()'j t',IO IrLr()c bl)'j \ I lllilCh It) IH)'P kh(m~ ehlia C:le ph:in III nlll} Khi lrong 1l1(J hlnh mach e6 de hl6n hO:lc Lin hlCll dwye khll'i lao gi,i Ir! tn['lk, dlCll n~ly s.: Luong dunng \'('ii \'l¢e Lrol1g 111'.ICh ph,li c{) nhu'llg ph:in Ill' luu Ir([ de gHi lri kIH')'i [i.IO l\'hu' \ ;)y h.hi lll() hlllh h6a e:lll Ink, ehuong trlnh 1m) ph()llg "i: ,inh 1"a de pld.Il Ill' nh(l &i Iuu tn-r de giii Irj J JJ('ii 1,.10 \1'.ICh tn)' Ih:lI1h mi,lch e6 nh6' Them \':10 (k), trung dlc 1l1{) hlnh lllHeh t{i h(.l'p de tin hi¢u \'i:1 hien c:\n ph'll dlt'oc ~iin ~Hi 11"1 Irll'lk klli dWK sLr L1t.lng

Moi du knh lufin I~r 11"Lf de I¢nh wait loop \'i:1 if \'(')'i nhCrng lin hi¢lI ctl~Ll

kIllen Iheo SLf('-m d~u c6 Ihe dllng dl: Ill{) 1<\ c,ic Ill,,lcll 16gic l{) h()p eic phcp loan ,,61H,le nllli +, -, * : c:k phcp to,in quan h0 d de phcp LO(UI ]()gic dcu e6 Lh~ dUO'e ~u dung lrong bi~ll thL"rc

-.~

.c )

Sel

-l

:[~

/

, '"Z

J llsel

IItllh 7.6 I Lll k,:'\ qU;1 101110' help 1ll;,ldl kkil' [Iklll

C{lIlg Cl.l Il)llg hqp e6 th~ tlwe ili~'n cilia Sl~ t~lI nguycn HC'U co ele lhao I;le lo,.lJ 11"(1' trong hiel! ellen thic!t k2' Vi Ull, hai ph~r LO(tn cl)ng lrong lrong dO'-.lll clurong trlnh dU()'i d:I.Y Iii hai phcp e(lIlg lo'.li trlf \'1 cluing kh6ng the Ilu.1'C hi~n d6ng lh()·i Chllng til co Ihe g,-in d.c ph0p to,tn d6 el10 hai khili ehL"fe nZl1lg kh,ic nhall hOi.ie ~:tn eho cung 1TIl)1 khoi chL"fe n:ulg IUy thw)e \'~IO d.e r~l1lg b1l6e \'C Ii:li nguy0n Kcu dicu ki¢n ri:tng hUl)C \'C lili ngu)'i.':n yell c:\u :-.l1' dl.lng

220

l1l(ll b() UHlg me.leh 1(;llg hqr duqc 0 c() (bng Iren hlnh 7.oa Tuy nhlen n(~"ll ctleu ki~n r:l1lg bll(JC yell du hal b(l C(~ng me.teh nh;lll (hl\fC :-.0 Cll dan~ lrl'll hlnh 7.6h

Vi dl.!,

process ( !\, B Sci)

1ll'~il1

if ( Sci = 'I' )

titl'l1 / <= B + C

l'ISl' Z <= A + D:

end if;

end procl'ss;

etC rh~p gein l(n hi0u song ong ccllhc dW"C il" dung ng[1l1 ~\.)n d{)i "("fi 1110t s6 loe.li ll1<'lch lhgic tll hl}'P, Vi duo trong qu; trtllh -.;illh ra gl:l tn 1\11("j Cll,1

b(l c(1!lg (by dll llj(~t bit dl th~ duqc vie'! du6i (L.lng m()1 phcp 1;,ln till hl~ll

song sung n[H!" trollg doc.1ll chucmg Irlllh dll"(ri d{IY

Vi lIl.1

architccilJl'l' D,llaF10\\ of FullAddcr is

signal A Il Cillo COLlt: BIT:

COllI ~ ( A and B ) or ( ( J\ or B ) and Cin ):

l'ud DalaF10\\:

Irig(j EIl1l \'l~l' then SU<)"J1 ":1 trigO' 1:1111

'ICC Ihl'O 111 (I"l' thll"(\ng dlfo'c Sll" dung

lrong de ph;in Ill' n!J(i m()1 bit Ta x:GI vi

till 111(1 1,'1 m;H:h tngo D [:1111 \'IC:C tilen

111((C

Vi d~l, m(l I;i h~lnh \'j m;.lch trigo D

1;\ln "i¢c Ih< 'o 111(I"( btlllg ng(lll ngu'

YHDL:

[)]ll [J[)OUI [ ) ( )

-S

- C

mnl! 7.7,!'ILKh tn-go D 1:\111 yieT

\"("1] ("he d(l deing 06 tlk'() 11llrC

121

signal S, Dill, DOut: R1T~

process ( S, Dill )

hegin

if ( S ~ 'J' ) then DOut <= Din~

end if;

end process;

(,hllng ta lh,·\y danh s,ieh Clie 1111 11I~u !lh',lY e:1I1l eht'ra l'de lin hh:'U S \'~I Din

ek lin hicu n~IY dn 111Ic't de rh:ill Ilr Irigo' D hO'.lI d(lllg dlillg l\hu \"':Iy kill till 11l~'1I Ircn dlf(\ng lin hicu S \';1 Din Ihay d(ii gla II"!, qU;l Irlnll C: dli(/e

DOtli dUr)'C '-til Il"Ong chi I¢nh dicll ki¢n if, gicl tf! lin IIl¢u trcn (hrll'l1g tin hl¢lI DOLIt si: kllollg Ihay dr'il lieu gi,i [rj tren du'i"mg S billlg ,()" N0'u gl;'ilq [ll-'Il du'(mg tin hicu S htlllg '1', gi;t Ir! Ircn c1u()"lIf,! tin hi¢u DOllt sc thay (kii \':\ billlg Din mt'Ji kili lin hl~'lI [rong danh siieh [in hi¢lI nltay cam [hay dl;1 gii'ilrl D6 EI h:lIlh \'i ho, t dl)llg cLla rh:in tlr Ing(5 1;1I11 \'I('e theo llllie : JIm \';:IY lkll Yl~i de milch trigo' 1;1111 vicc thcn llllk chung Iii plHli chi j"() danh s,kh ell' tin hl¢u t,le d(mg Kili Clie [in hl¢u I;Ie d(mg thay doi Ihl qUit ll'!nh Illl1 la h:!llh \'1 ella Ill<,lcil sC: dU'9'c Ih~rc hl¢n

tlt,j'J]g Ircn nhCmg ei'llI I¢nh dJCU kl¢n if kll(lug (hi), dl'l ell the hicli chi knh

dicli kl~~n if J h(lng (hiy du lit du I~nll if chi e6 Im)l nh,\llh th('11 \:\ khullg chLra nh;lnh c1st, l\"hu v'~y nwi lin hi¢u hO;h: bien khl)llg dUde diL'lI hllicll h(')'i t{11 cil de kh,\ n{l1Ig e(i lhc e6 eua diell ki¢n dell dune llll1 ph\lllg 111:11111 lllll-rllg ph::ill Ill' IIlgu' l~lIll \'i~c th ::o IlUi-C C;lC ph:lll tll' trig(51;1111 \'i('c theo llll~rc llilf()llg

XlI:tt hi('ll lrollg Llu,i Irlllh IllO plll'lIlg khi g'.IP c;le knh if \';\ cast' OJ cau IrltC

klH)ng d;IY dll D(\ln dll!,(Jng trlllh t]'(lng \'1 lit! \'Lra nCli tl'l'll ILrung Ll'Ilg \'(')'i phan Ill' Irigo Elm \'Jce Iheo mt'fe d dtH)e hi~lI dJl'll ht\llg du ]Cnh if e6 e:1lI

IrllC khr'lIIg (by dLI

Dc Ir;lnh s~r XUil't hi¢n ella de phSn Ill' lrig(i !i\ln "icc theo mlre khl\llg mOllg l11u6n ehlJng til ph;11 g;ln [ill hi¢u ,,6i tAt c,i de kha Ilallg e6 the U') ella diC:u kl¢n trong dc du knit rc nhi'inh Vi dL,I, llC'U [<I b(~ sung de nh;lnli \";10

C,-lU Knh diC:u kl¢n [J'Ollg dO'-,1I1 eilu'()"ng trillil nClI lren, chi I¢nh if sc dwyc hicli

222

d!(~n (tty ell! Kill dt) doan chmmg tr!nh sc c1U\K chuang Irl11h m() ph(\n~ tt)llg 1HlP nhu 1ll<1t ph,tll tlf At\'D

Vldl.1

si~nal S, DIn, DOu!: BIT:

procl2s~ { S, Din) he~in

if ( S = '1' ) then

DOul <= Din;

else

l'ud if end process:

DOllt <= 'cr;

Chung la c6 Ihe rn(l ta ni1L"rng ph:in tu trigo 1;1111 vice thc() \l1Lrc \·t\1 hell lLIU tin hicu Ilm't [{ip ~lci tri '0' hoi.ic 'I' kh()ng d(lllg b(l DO<ln dUl'ting trlllh tlw"ii d[IY SC blCll di0n ph:in ILl" Ingo'l:l1n \'i¢c then 111LrC c6 glcl Iri '0;: Ihle"1 Lip \\:: '(l'

J hi lin 11I¢u (btl \'aO kh6ng dong be) RST nh,)n gl,\ tl"1 b,lng' l\IH( \' (v

Irong \'f d\l n;I)" tfll hlCU RST 1:1 till hl~'U kfch ho,.11 nii vO'i lllL!"C gi, l1'i Ifn hiC'u can

RST = I -==> IhicI Wp In,lllg tl1<ii eua trigo' \'~ '0'

si~n<ll S, RST D[n, DOll!: BIT;

Pl'OCI2SS ( S, RST, DIll )

hq!,in

DOLlI <= '0';

c1sif ( S:::: 'I' ) then

DOut <= DIn;

end if:

cnd procl2ss;

r-.;C'u chLlng: la muCin dOl lin hi~u I{ST thi:l11h tin hi¢Ll kich h It ,/ii IllLK gi,\ tri th'\"p dic'u ki¢n trollg cJu I¢nh if <.;13 chuyen Ill' ( RST ;:: 'I' ) thi:lllh ( RST = '[)' )

J XilY {hmg ml.H:h dl'mg htl hai pha

C(IC m,lch d6ng h6 hai pha c6 the' du\,l'C m(l ta h:ll1g deb su' dung cae Irign I:lln vice theo 1l1ll'l.: l\1neh d6nt! h(; hal plw (hr(le hicu (hen h,lng hai qu:i 11"I11h Troll~ (h.'l mtl\ qu,i Il'lnh m{l 1'-1 m~leh Ie) hClp yil !1lach 1:1\ t:int! Ill(lt lju:!

Il'lllh kh.ic Ill,) ta 111'.lc11 16 hop \';1 mach 1:11 IClllg tIll! hai

Vi dl.! 11110'1 k0' Cll(1 Ill<'lch d6ng h,) hai pha ,,;: du'oc 1l1tl hI bang dn:.lll

dllfnng Iflnh trell ng6n ngll' VHDL nllll' sau:

('n tity T\\'oPhasc is

port( A, B: in B[T: PhI Ph2: in BIT: I: huffer I~J r ):

end T\\'oPha" :::

architecturt' Impkmcnl of T\\'oPhasc is

signalll: fliT:

pron'~ ( A I Phi I hegin

if ( Phi_l = '1' ) then

J) <= " or?:

end if:

end proc('ss:

procl'ss( B D, Phl_2 ) hegin

if ( Phi_2 ::::: 'I' ) thl'1l

7, <::: Band ( not D ):

end if

end process:

end Implement

4 Cric Im~ch triga lam vi('C theo sUtHl ( nip.tlop )

Cae qua Irlnh chua cae tin hi¢u if hO~le wait dieu khi~n thl:O sui.'1!1 kn hO~IC SU'C111 xuong ) la cae qu<i trlnh duqe c1inh gio' Cilc In'-,Ieh trigci dicu

kh[(~n Iheo sU0n l~n hO~lC sui.'m wong clIa tin lm':u se dll'0c 1,:,10 1'<1 lir m6 1<.'\ Iren ng(m ngu YHDL lle'u phcp g,in tin hi¢u ( hO[lc ph~p g.in hie'n ) dUQ'c tln,rc

hi~n thea sU0n 10n ho,)c suan xuong ella de tin hi¢u dieu khitn Kili tim ra ,>uon ella I(n hi¢u dong ho ChU'(illg Ir1nh m6 phl1ng co tht xac dinh dUQ'c \'j Irf dc dtIu phfin tir Iriga yao !TIn hlnh NhtI V(I)' m6 hlnh nh(m (hlqc se hO<'11 dqng theo dl! doan Irong giai dm,lil thiel kc

Thune Ifnh event ella tin hi~u dlf~iC dung

de hicu dil:n sy' hien Ihien clIa tin hi¢u Khi

chung ta c[in x,\c dinh Sl! hle'n thien ella I(n

hi¢LJ thWle tinh event siS cho ra gi,\ lr! 16gie

tu5' Iheo tren <luang lin hi¢u co Xll<lt hi91l "lJ

ki¢n hay kh6ng ThuQc Ifnh stable cGng cho

gi,i Ir! 16gic vii e6 )' nghia nguQ'c h.li n"'ii thuQc

IInh ennt

Tron!.: ~ vi tlu du6'i duv chuno- ta mn t,\ _ e

Din I

elK

DOu!

mnh 7.9 Trigo D (ticu khic'll

theo ~lf(Jlllil1 hlcu (ICing 110_

trigc) D diJu khie'n theo sHon len bilng ngnn ngO' YHDL Bieu dil;n cLla 1l1'.lch hao g6m m(ll qUii Irinh process e6 danh sach lin hi~u I[\C dQng chCra lin hicu (kl11g Ito elK Qua trlnh nay dura m(l\ ulU l~nh if Cll bicLi Ihu.-c dicu bet

kicm tm Slran 12n eLla lill hieu dong ho eLK Trong Ihai gian tin hi~L1 IhiLI J;)p SU'liIl len, giil Ir! Iren (lLri\ng 11n hi~u DIn dU'(iC gilIl cho (hrong lin hicll DOu\

V i ell.! m() 1:1 hOi.11 d(lllg cua tngo D lam vi¢c thea sU'an len ella tin hieu dong h6 elK

signal eLK DIn DOul: BIT;

proccss( eLK)

begin

225

if ( CLK'eyent and CLK =' I' ) then

DOlIt <= Din;

end if;

cnd process:

Trang doc chuang trinh Iren ng6n ngiJ VHDL, cUc bie'n cling, co Ihe sinh

ra uk trigo dicu khicn then sub"]} tin hi¢u Cluing ta hiet n\ng, khi 1l1<)t bien dU0c khai h;lo trang mOt qua Irlnh process, gii.! Ir! cua bien '>0 kh6ng rb"i khhi qua Ir!nh (eo nghla li\ gia Iri cllil bien dU0C kiwi h,-Io hen trong m(l\ qua Irtnh se khollg dW1c SLr d~lng 6 hen llgo}i qua trlnh) l\hu V~IY, Ihoi dic'm 1l1~1 llH)1 hierl ~e sinh ra 11191 trig a dieu kilien then su-an trung qu,-! Irlnh 111<) ph<'lIlg 1;1 thc\i diem khi hie-n dUtfc su dl;mg tmoe Ide du~)"c g[U1 giCI Iri hen Irong qua trlnh clLrqe di~u killen theo till hicu cl{)ng h6 Trong vi ell,! du6i c!iIY, dOi 111 mil c11L]"<1ng trlnh VHDl sc sinh ra hai phi'ln tu: trigo 1~1.I11 Yi¢c Iheo strim k.hl c1uoc

11111 phong

Vi ell;): doan chHang Irlnh 1,-.tO ra hai plu:tn tu triga dieu khiell Ihen sU<JJ1 trong qUii trlnl1m6 phong

signal CLK DIn DOuI: OIT:

proccss(CLK) yar"iablc TMP: I31T;

hegin

if (CLK'event and ClK = ' 1') then

DOu! <~TMP:

end if:

end process:

TMP:~ DIn:

Trong vi dl;)lld.y, bien TMP duqc SLr dt.wg lru"6c khi duC/c gi.in gi,] Ifi NIH!"

\'i.~y, gia tf! chua trong bic'n TMP lit gia tr! c6 cltrQ"c S<.lU I[in 1~IP trLIlk ella Irlnh It! thJ!c hi~n quil Idnh vu chung la can ph,ii co m(ll trigo de" lUll 11'0· g.i:1 1n nay Neu chung la doi cho hai phep gan trong dOi.tn chuung Irluh U61 tren, hien TMP se lU"ang ung dan thurin \'6i mOt d{ty dan Khi do chi e6 Il1l)t phrin

tu trigC1 '>c dtI~)"c t'.lO fa trong qua trlllh 1116 hinh hoa mi teh

226