XC5VSX95T-2FF1136I Xilinx Inc, XC5VSX95T-2FF1136I Datasheet - Page 105
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XC5VSX95T-2FF1136I
Manufacturer Part Number
XC5VSX95T-2FF1136I
Description
FPGA Virtex®-5 Family 94208 Cells 65nm (CMOS) Technology 1V 1136-Pin FCBGA
Manufacturer
Xilinx Inc
Series
Virtex™-5 SXTr
Datasheets
1.XC5VLX30-1FFG324C.pdf
(91 pages)
2.XC5VLX30-1FFG324C.pdf
(13 pages)
3.XC5VLX30-1FFG324C.pdf
(385 pages)
Specifications of XC5VSX95T-2FF1136I
Package
1136FCBGA
Family Name
Virtex®-5
Device Logic Units
94208
Typical Operating Supply Voltage
1 V
Maximum Number Of User I/os
640
Ram Bits
8994816
Number Of Logic Elements/cells
94208
Number Of Labs/clbs
7360
Total Ram Bits
8994816
Number Of I /o
640
Voltage - Supply
0.95 V ~ 1.05 V
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 100°C
Package / Case
1136-BBGA, FCBGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With
HW-AFX-FF1136-500-G - BOARD DEV VIRTEX 5 FF1136
Number Of Gates
-
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
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Manufacturer
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Price
Company:
Part Number:
XC5VSX95T-2FF1136I
Manufacturer:
Xilinx Inc
Quantity:
10 000
Part Number:
XC5VSX95T-2FF1136I
Manufacturer:
XILXIN
Quantity:
20 000
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PLL Use Models
Virtex-5 FPGA User Guide
UG190 (v5.3) May 17, 2010
Missing Input Clock or Feedback Clock
Clock Network Deskew
When the input clock or feedback clock is lost, the PLL will drive the output clocks to a
lower or higher frequency, causing all of the output clocks to increase/decrease in
frequency. The frequency increase/decrease can cause the clock output frequencies to
change to as much as six times the original configuration.
There are several methods to design with the PLL. The PLL wizard in ISE software can
assist with generating the various PLL parameters. Additionally, the PLL can be manually
instantiated as a component. It is also possible for the PLL to be merge with an IP core. The
IP core would contain and manage the PLL.
One of the predominant uses of the PLL is for clock network deskew.
PLL in this mode. The clock output from one of the O counters is used to drive logic within
the fabric and/or the I/Os. The feedback counter is used to control the exact phase
relationship between the input clock and the output clock (if, for example a 90° phase shift
is required). The associated clock waveforms are shown to the right for the case where the
input clock and output clock need to be phase aligned. This configuration is the most
flexible, but it does require two global clock networks
X-Ref Target - Figure 3-10
There are certain restrictions on implementing the feedback. The CLKFBOUT output can
be used to provide the feedback clock signal. The fundamental restriction is that both input
frequencies to the PFD must be identical. Therefore, the following relationship must be
met:
As an example, if ƒ
frequency are both 498 MHz. Since the M value in the feedback path is 3, both input
frequencies at the PFD are 166 MHz.
In another more complex scenario has an input frequency of 66.66 MHz and D = 2, M = 15,
and O = 2. The VCO frequency in this case is 500 MHz and the O output frequency is
250 MHz. Therefore, the feedback frequency at the PFD is 500/15 or 33.33 MHz, matching
the 66.66MHz/2 input clock frequency at the PFD.
1
IBUFG
2
3
CLKIN1
CLKFBIN
RST
PLL
IN
Figure 3-10: Clock Deskew Using Two BUFGs
is 166 MHz, D = 1, M = 3, and O = 1, then VCO and the clock output
CLKFBOUT
www.xilinx.com
CLKOUT0
CLKOUT1
CLKOUT2
CLKOUT3
CLKOUT4
CLKOUT5
f
------ -
D
IN
=
f
FB
4
6
=
BUFG
BUFG
f
------------ -
VCO
M
5
To Logic
(Figure
3-10).
1
2
3
4
5
6
Figure 3-10
PLL Use Models
Equation 3-8
UG190_3_10_040809
shows the
105
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