xc4020e-xl Xilinx Corp., xc4020e-xl Datasheet - Page 15

• Manufacturer Part Number: xc4020e-xl
• Description: Xc4000e And Xc4000x Series Field Programmable Gate Arrays
• Manufacturer: Xilinx Corp.

May 14, 1999 (Version 1.6)
Figure 13: Fast Carry Logic in XC4000E CLB (shaded area not present in XC4000X)
H1
G4
G3
G2
G1
F4
F3
F2
F1
CARRY
LOGIC
R
C
IN
CARRY
CARRY
C
UP
OUT
G
F
C OUT0
C
IN
DOWN
C
XC4000E and XC4000X Series Field Programmable Gate Arrays
OUT
G
F
H
D
K
IN
DIN
DIN
G
H
H
G
H
G
H
F
F
F
S/R
D
D
S/R
S/R
EC
EC
EC
Q
Q
X6699
Y
YQ
XQ
X
6-19
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