lt tDrtrcnr or Eleiro.ics, Td@6o!!iolio, & ttior.di.rl E.linerttrg
lt tDrtrcnr or Eleiro.ics, Td@6o!!iolio, & ttior.di.rl E.linerttrg
lt tDrtrcnr or Eleiro.ics, Td@6o!!iolio, & ttior.di.rl E.linerttrg
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h FiguE4,3 *e siow expcinenEt rcsuls shosing rhc cfTccr otctuster!iz.on riLu<br />
l.nBrh. We us the <strong>di</strong>o offt. &rual v.lu.s in rhis c!rv. ro &cumrcty scale rouling<br />
egnqr lcngrhs f<strong>or</strong> <strong>di</strong>feEil clu$q siz6.<br />
.1.2..1 SizirB Rouiingfmlsbton lo Comlen$t.l<strong>or</strong> l<strong>rl</strong>fle.ent Phyricrt S.gncnr<br />
To Dotrrtcrsrrc l<strong>or</strong> <strong>di</strong>rcrcNcs<br />
ir FPGAs using <strong>di</strong>ficEnt sizcs<br />
(hc qt&ilaDcc lnd rcsisr$ce oiruoting scgmcft<br />
losic cluster! we sc.l.lh. rouring po$ lmnskoN<br />
and hff6. All 6f our pass rBnsistc ed bufter saling is in rel<strong>di</strong>o ro a be<br />
!rc[nelurc thar has bcn <strong>or</strong>er-dclay oprinized r'<strong>or</strong> cluslcE olsize tbur. From lhh<br />
ba* architcctuE, we lin6<strong>rl</strong>, @le @<strong>di</strong>n8 buftrs and pls rarsistou dcFn<strong>di</strong>rg on<br />
rhc Elarion bctwco rhe ncq s8ne l.nerhs and rh. blc segmcnr l.ngrh. F<strong>or</strong><br />
example. in !n FPCA wnh size 16 clun.6. rhe physiol sesdcnt le.glh h<br />
lppoxnn.tely two rim.s lotrgcr rhe in .. irchnNtut whh siz. 4 clusre6. To<br />
hointain oushly the sde speed per ouritrg sesmenr, wc incrcase the size <strong>or</strong>rhe<br />
ouling switch.s @nnecling ro ah wiE by a lebr of 2. In Serion 4.5 wc verify thd<br />
fiis lire sling of buf|u lnd pa$r6osisro6 wnh phlsical s.emcnl lenslh<br />
prcvides good rcsu<strong>lt</strong>s. VPR mod.h chang.s in delat eusd by resiring bulTe6 ard<br />
pasr@siiou in rh. ourin& lnd it ale .oudrely mod.ls the aE rcquiEd f<strong>or</strong><br />
<strong>di</strong>lTdrentsizcsolbuti'rg pds$l.o.sisr<strong>or</strong>s d buie6.<br />
{,3 FPCA ARCHITECTURAL PARAMETORS<br />
'to evaluarc rhc sp*d and ar€ ofan fPGA enpl<strong>or</strong>ing logic clusrcts fo. irs logic<br />
bl@ks. we nust ch@s not oily thc losic bldk architccture, but .lo r mutinl<br />
ehn@r!E. rotuhbr siz.s, ed rh. flqibilny of fi. logi. blck b Mtins indfc.<br />
'lhc followinS s.crions delail thc archir4onl paramereB uFd in ou cxp<strong>di</strong>ments.
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