XC2VP70 Xilinx, Inc., XC2VP70 Datasheet - Page 33

• Manufacturer Part Number: XC2VP70
• Description: Virtex-ii Pro Field Programmable Gate Array
• Manufacturer: Xilinx, Inc.

Functional Description: FPGA
Configurable Logic Blocks (CLBs)
The Virtex-II Pro configurable logic blocks (CLB) are orga-
nized in an array and are used to build combinatorial and
synchronous logic designs. Each CLB element is tied to a
switch matrix to access the general routing matrix, as
shown in
24
Switch
Matrix
Figure
Figure 23: Virtex-II Pro CLB Element
23.
TBUF
TBUF
X0Y1
X0Y0
Slice
Slice
COUT
CIN
SHIFT
X1Y1
X1Y0
Slice
Slice
COUT
CIN
DS083-2_32_122001
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A CLB element comprises 4 similar slices, with fast local
feedback within the CLB. The four slices are split in two col-
umns of two slices with two independent carry logic chains
and one common shift chain.
Slice Description
Each slice includes two 4-input function generators, carry
logic, arithmetic logic gates, wide function multiplexers and
two storage elements. As shown in
function generator is programmable as a 4-input LUT, 16
bits of distributed SelectRAM+ memory, or a 16-bit vari-
able-tap shift register element.
Figure 24: Virtex-II Pro Slice Configuration
RAM16
RAM16
SRL16
SRL16
LUT
LUT
G
F
Arithmetic Logic
MUXF5
MUXFx
DS083-2 (v2.9) October 14, 2003
CY
CY
ORCY
Advance Product Specification
Figure
Register/
Register/
Latch
Latch
DS083-2_31_122001
24, each 4-input
R