XC2VP20-6FF1152C Xilinx, Inc., XC2VP20-6FF1152C Datasheet - Page 31

• Manufacturer Part Number: XC2VP20-6FF1152C
• Description: Pro Platform FPGA
• Manufacturer: Xilinx, Inc.

The output from the function generator in each slice drives both the slice output and the D input of the storage element.
Figure 22
Configurations
Look-Up Table
Virtex-II Pro function generators are implemented as
4-input look-up tables (LUTs). Four independent inputs are
provided to each of the two function generators in a slice (F
and G). These function generators are each capable of
implementing any arbitrarily defined boolean function of four
inputs. The propagation delay is therefore independent of
the function implemented. Signals from the function gener-
ators can exit the slice (X or Y output), can input the XOR
dedicated gate (see arithmetic logic), or input the carry-logic
multiplexer (see fast look-ahead carry logic), or feed the D
DS083-2 (v1.0) January 31, 2002
Advance Product Specification
ALTDIG
SOPIN
SLICEWE[2:0]
WG4
WG3
WG2
WG1
CLK
CE
SR
G4
G3
G2
G1
BY
shows a more detailed view of a single slice.
R
SHIFTIN
MULTAND
A4
A3
A2
A1
WG4
WG3
WG2
WG1
WE[2:0]
WE
CLK
0
Figure 22: Virtex-II Pro Slice (Top Half)
WSG
WS
WSF
Dual-Port
Shift-Reg
G
LUT
RAM
ROM
MC15
DI
D
SHIFTOUT
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1-800-255-7778
I
1
0
Shared between
x & y Registers
G2
PROD
G1
BY
input of the storage element, or go to the MUXF5 (not
shown in
In addition to the basic LUTs, the Virtex-II Pro slice contains
logic (MUXF5 and MUXFX multiplexers) that combines
function generators to provide any function of five, six,
seven, or eight inputs. The MUXFX is either MUXF6,
MUXF7, or MUXF8 according to the slice considered in the
CLB. Selected functions up to nine inputs (MUXF5 multi-
plexer) can be implemented in one slice. The MUXFX can
also be a MUXF6, MUXF7, or MUXF8 multiplexer to map
any function of six, seven, or eight inputs and selected wide
logic functions.
Virtex-II Pro™ Platform FPGAs: Functional Description
MUXCY
COUT
O
CYOG
O
MUXCY
I
CIN
Figure
I
XORG
ORCY
22).
DYMUX
CLK
YBMUX
CE
D
CE
CK
GYMUX
SR
SR
FF
LATCH
Y
REV
Q
DS031_01_110600
YB
Y
DY
DIG
SOPOUT
Q
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