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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A simplified view of lhs 4000XL logic cluster architecrue h shoqn Fisurt 2.9 on page<br />
l8 (uhich docs .ol includc r RAM m! coiiy losic) on pdge 18, Eaclr losic clusl<strong>or</strong><br />
contlins 1rc4.i{!r lookupEblcs (4.LUTsl, one 3-LUT. two Drypc nip.llops, aM lwo<br />
gn<br />
Trbl. 2,1: XC400E/XL rrnily<br />
E&h logic cluter hd c&y logic ro !llo* ctrry chains to b. fom.d usiig hid{p"d<br />
dn€d conn*tions betw.cn 'djacenr logic bl@ks Clste6).<br />
Each of the 4-LUTS re@iv6 its iryurs fon lhe inpds ro the logic bl@k (F ed C) The<br />
I-LUT c@ rcc€ivc ils inpurs lrom lwo sources, either all froh inputs to lhe loSic bldk<br />
(c)-<strong>or</strong>flonooe<strong>or</strong>bothoi$eourpulsolrh.4-LUtslF aidG') <strong>lt</strong> isposiblel<strong>or</strong>e'hze<br />
a nunberof<strong>di</strong>f€tcnl lypca ol tunclions,dnging liom two lunctioN of rbu! inputs and a<br />
rhnd tunclionolrhrce irrpus. up lo sonie l!nctionsoftrinc inPUrs
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