Virtex-E 1.8 V Field Programmable Gate Arrays
R
Module 2 of 4
DS022-2 (v3.0) March 21, 2014
4
Production Product Specification
— OBSOLETE — OBSOLETE — OBSOLETE — OBSOLETE —
Storage Elements
The storage elements in the Virtex-E slice can be config-
ured either as edge-triggered D-type flip-flops or as
level-sensitive latches. The D inputs can be driven either by
the function generators within the slice or directly from slice
inputs, bypassing the function generators.
In addition to Clock and Clock Enable signals, each Slice
has synchronous set and reset signals (SR and BY). SR
Figure 4: 2-Slice Virtex-E CLB
F1
F2
F3
F4
G1
G2
G3
G4
Carry &
Control
Carry &
Control
Carry &
Control
Carry &
Control
LUT
CIN
COUT
YQ
XQ
YQ
X
XB
Y
YB
Y
BX
BY
BX
BY
G1
G2
G3
G4
F1
F2
F3
F4
Slice 1
Slice 0
XB
X
LUT
D
CE
Q
RC
SP
D
CE
Q
RC
SP
D
CE
Q
RC
SP
D
CE
Q
RC
SP
ds022_04_121799
Figure 5: Detailed View of Virtex-E Slice
BY
F5IN
SR
CLK
CE
BX
YB
Y
YQ
XB
X
XQ
G4
G3
G2
G1
F4
F3
F2
F1
CIN
0
1
0
F5
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COUT
CY
D
CE
Q
D
CE
Q
F6
CK
WSO
WSH
WE
A4
BY DG
BX
DI
O
WE
I3
I2
I1
I0
LUT
CY
I3
I2
I1
I0
O
DI
WE
LUT
INIT
REV