EP2A15 Datasheet, PDF (14/99 Pages) Altera Corporation – Programmable Logic Device Family

APEX II Programmable Logic Device Family Data Sheet
Figure 6. APEX II Carry Chain
Carry-In
a1
LUT
b1
Carry Chain
a2
LUT
b2
Carry Chain
an
LUT
bn
Carry Chain
LUT
Carry Chain
Register
s1
LE1
Register
s2
LE2
Register
sn
LEn
Register
Carry-Out
LEn + 1
14
Altera Corporation