Xilinx XC4000 Series

September 18, 1996 (Version 1.04) 4-23
Figure 14: Detail of XC4000E Dedicated Carry Logic
01
01
M
M
0
1
01
M
0
1
M
10
M
M
0
3
M
1
M
I
G1
G4
F2
F1
F3
C
OUT
G2
G3
F4
C
INUP
C
IN DOWN
X2000
TO
FUNCTION
GENERATORS
M
M
M
C
OUT0
Figure 15: Detail of XC4000EX Dedicated Carry Logic (shaded areas show differences from XC4000E carry logic)
M
M
M
M
M
01
01
0
1
1
0
1
0
3
1
0
M
M
M
M
M
F4
G3
G2
G1
G4
F2
F1
F3
M
TO
FUNCTION
GENERATORS
C
OUT
C
OUT0
C
IN UP
X6701