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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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hc buring aH a8ain sLrc io ifttle lrd b@h6 laad rhj .h. rcuting aEa oa<br />

the mhikruc $al conr.insno cMs rcurii8 rrets.<br />

'<br />

ROUTINC DEI,AY<br />

Thc Bhneaic av.68. <strong>or</strong> tne ponion ot cririFt pdn d.lay lh.t is oNunEd by $.<br />

outi.g @urc.s f<strong>or</strong> och circuir is shoqn in FiCuE 5.9 chapl.r 5. In rh. fiCue rh.<br />

X-axh repf*nls thc.u6b€. oICMS slrii8 racks sDeifi.d in rh. i<strong>rl</strong>e$igari<strong>or</strong>.<br />

The Y-axis Epes.nG ihc delay neduEd in nrms@nds<br />

As shown (FiglE 5.9). th.r. ft em. spad p.n.hi6 .ssiatcd wiri sins rhe CMs<br />

tftks fm a mrjoity olaEhnanuB. F<strong>or</strong> 4, 8, 12, 40, !r4. 60. Md 64 CMs @(ing<br />

l6cks per channcl. however. the p€rromance o | ftese arch ireru r.s arc cohpambtc to<br />

rhc!rchilecttrrecon|lining noCMS rmcks.<br />

Chaprcr 6 presna $. rBulc of qp€dndB run ro n6ua |<strong>or</strong>at e4 inFa{lccr<br />

aE, fbrrusr.r d., robl cioir d.lan inlra{luslq d.t.y, sd inre.{tuster d.tay<br />

oflhe neP FGPR outilgalgoirhm.<br />

> LOOK-UP TABLI VsCLUSTER SIZE<br />

Th.rc have b.en sclcdl nu<strong>di</strong>6 in lh. p6l which d<strong>di</strong>ned rh. .fier ol toSic btek<br />

aunctionality on $c aB md Fsfomme ol FPCAS Tne r* ol l.Ac LUT5 gpn@lly<br />

prcdu€s Eood pcdomine Bulrs sincc ih.F ec a lew.r iunb.r of BLES on dt<br />

given crilical path. However bs3tr& thc logic blNk ma grow3.xponenrially snh<br />

tlic nunb.r ofLUT inpua, iha laa.r bl6k.rc vcry.xp.miv.. With rhis in mind.<br />

th. kct t(l dy FPOA logic hlcl rtudy b 1o bdee ln* tlo oppcins feb6 md<br />

delcmine an appropriaG LUT sir which givcs b<strong>or</strong>h good p.domance and logic<br />

densiry. F<strong>or</strong> cximpl.. rhh w<strong>or</strong>k shows rhar a LU l size ol4 and 5 <strong>or</strong>e rhc mon aR.<br />

cficienl in the clun.,el com*r. On. of th. k y obeRarions frcm rhis sudy is rhar<br />

tz7

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