XC5VLX220T-1FF1738I Xilinx Inc, XC5VLX220T-1FF1738I Datasheet - Page 368
XC5VLX220T-1FF1738I
Manufacturer Part Number
XC5VLX220T-1FF1738I
Description
IC FPGA VIRTEX-5 220K 1738FBGA
Manufacturer
Xilinx Inc
Series
Virtex™-5 LXTr
Datasheets
1.XC5VLX30-1FFG324C.pdf
(91 pages)
2.XC5VLX30-1FFG324C.pdf
(13 pages)
3.XC5VLX30-1FFG324C.pdf
(385 pages)
Specifications of XC5VLX220T-1FF1738I
Number Of Logic Elements/cells
221184
Number Of Labs/clbs
17280
Total Ram Bits
7815168
Number Of I /o
680
Voltage - Supply
0.95 V ~ 1.05 V
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 100°C
Package / Case
1738-BBGA, FCBGA
For Use With
HW-AFX-FF1738-500-G - BOARD DEV VIRTEX 5 FF1738
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Number Of Gates
-
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Chapter 8: Advanced SelectIO Logic Resources
368
Bitslip Timing Model and Parameters
This section discusses the timing models associated with the Bitslip controller in a 1:4 DDR
configuration. Data (D) is a repeating, 4-bit training pattern ABCD. ABCD could appear at
the parallel outputs Q1–Q4 of the ISERDES in four possible ways: ABCD, BCDA, CDAB,
and DABC. Only one of these four alignments of the parallel word makes sense to the
user's downstream logic that reads the data from the Q1–Q4 outputs of the ISERDES. In
this case, ABCD is assumed to be the word alignment that makes sense. Asserting Bitslip
allows the user to see all possible configurations of ABCD and then choose the expected
alignment (ABCD).
corresponding re-alignments of the ISERDES parallel outputs Q1–Q4.
X-Ref Target - Figure 8-12
Clock Event 1
The entire first word CDAB has been sampled into the input side registers of the ISERDES.
The Bitslip pin is not asserted; the word propagates through the ISERDES without any
realignment.
Clock Event 2
The second word CDAB has been sampled into the input side registers of the ISERDES.
The Bitslip pin is asserted, which causes the Bitslip controller to shift all bits internally by
one bit to the right.
Clock Event 3
The third word CDAB has been sampled into the input side registers of the ISERDES. The
Bitslip pin is asserted for a second time, which causes the Bitslip controller to shift all bits
internally by three bits to the left.
On this same edge of CLKDIV, the first word sampled is presented to Q1–Q4 without any
realignment. The actual bits from the input stream that appear at the Q1–Q4 outputs
during this cycle are shown in A of
BITSLIP
CLKDIV
Q4–Q1
CLK
D
Figure 8-12
C D A B C D
Figure 8-12: Bitslip Timing Diagram
www.xilinx.com
shows the timing of two Bitslip operations and the
1
Figure
Bitslip1
A B C D A B
8-13.
2
Bitslip2
CDAB
C D
3
BCDA
Virtex-5 FPGA User Guide
UG190 (v5.3) May 17, 2010
4
ug190_8_12_100307
ABCD
5
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