XC4VFX100-10FFG1152C Xilinx Inc, XC4VFX100-10FFG1152C Datasheet - Page 45
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XC4VFX100-10FFG1152C
Manufacturer Part Number
XC4VFX100-10FFG1152C
Description
IC FPGA VIRTEX-4FX 100K 1152FBGA
Manufacturer
Xilinx Inc
Series
Virtex™-4r
Specifications of XC4VFX100-10FFG1152C
Number Of Logic Elements/cells
94896
Number Of Labs/clbs
10544
Total Ram Bits
6930432
Number Of I /o
576
Voltage - Supply
1.14 V ~ 1.26 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 85°C
Package / Case
1152-BBGA, FCBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Gates
-
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Part Number:
XC4VFX100-10FFG1152C
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Xilinx Inc
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VHDL and Verilog Templates
Virtex-4 FPGA User Guide
UG070 (v2.6) December 1, 2008
Regional Clock Nets
BUFGCTRL VHDL and Verilog Templates
R
VHDL Template
In addition to global clock trees and nets, Virtex-4 devices contain regional clock nets.
These clock trees are also designed for low-skew and low-power operation. Unused
branches are disconnected. The clock trees also manage the load/fanout when all the logic
resources are used.
Regional clock nets do not propagate throughout the whole Virtex-4 device. Instead, they
are limited to only one clock region. One clock region contains two independent regional
clock nets.
To access regional clock nets, BUFRs must be instantiated. A BUFR can drive regional
clocks in up to two adjacent clock regions
can only access one adjacent region; below or above respectively.
The VHDL and Verilog code follows for all clocking resource primitives.
The following examples illustrate the instantiation of the BUFGCTRL module in VHDL
and Verilog.
BUFRs
--Example BUFGCTRL declaration
component BUFGCTRL
generic(
INIT_OUT
Figure 1-23: BUFR Driving Multiple Regions
www.xilinx.com
: integer := 0;
(Figure
1-23). BUFRs in the top or bottom region
VHDL and Verilog Templates
ug070_1_23_071404
45
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