XC5VSX50T-1FF1136I Xilinx Inc, XC5VSX50T-1FF1136I Datasheet - Page 69
![IC FPGA VIRTEX-5 50K 1136FBGA](/photos/6/73/67306/xilinx-_1136-fbga_sml.jpg)
XC5VSX50T-1FF1136I
Manufacturer Part Number
XC5VSX50T-1FF1136I
Description
IC FPGA VIRTEX-5 50K 1136FBGA
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 XC5VSX50T-1FF1136I
Number Of Logic Elements/cells
52224
Number Of Labs/clbs
4080
Total Ram Bits
4866048
Number Of I /o
480
Voltage - Supply
0.95 V ~ 1.05 V
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 100°C
Package / Case
1136-BBGA, FCBGA
For Use With
HW-V5-ML506-UNI-G - EVALUATION PLATFORM VIRTEX-5HW-AFX-FF1136-500-G - BOARD DEV VIRTEX 5 FF1136
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Number Of Gates
-
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Virtex-5 FPGA User Guide
UG190 (v5.3) May 17, 2010
In the FIXED, VARIABLE_POSITIVE, and VARIABLE_CENTER phase-shift mode, the
PHASE_SHIFT attribute is in the numerator of the following equation.
Where PERIOD
In VARIABLE_CENTER and FIXED modes, the full range of the PHASE_SHIFT attribute is
always –255 to +255. In the VARIABLE_POSITIVE mode, the range of the PHASE_SHIFT
attribute is 0 to +255.
In the DIRECT phase-shift mode, the PHASE_SHIFT attribute is the multiplication factor
in the following equation:
In DIRECT modes, the full range of the PHASE_SHIFT attribute is 0 to 1023.
FINE_SHIFT_RANGE represents the total delay achievable by the phase-shift delay line.
Total delay is a function of the number of delay taps used in the circuit. The absolute range
is specified in the DCM Timing Parameters section of the Virtex-5 FPGA Data Sheet across
process, voltage, and temperature. The different absolute ranges are outlined in this
section.
The fixed mode allows the DCM to insert a delay line in the CLKFB or the CLKIN path.
This gives access to the +FINE_SHIFT_RANGE when the PHASE_SHIFT attribute is set to
a positive value, and –FINE_SHIFT_RANGE when the PHASE_SHIFT attribute is set to a
negative value.
Absolute Range (Variable-Center Mode) = ± FINE_SHIFT_RANGE ÷ 2
The variable-center mode allows symmetric, dynamic sweeps from –255/256 to +255/256,
by having the DCM set the zero-phase-skew point in the middle of the delay line. This
divides the total delay-line range in half.
Absolute Range (Fixed) = ± FINE_SHIFT_RANGE
In the fixed mode, a phase shift is set during configuration in the range of –255/256 to
+255/256.
Absolute Range (Variable-Positive and Direct Modes) = + FINE_SHIFT_RANGE
In the variable-positive and direct modes, the phase-shift only operates in the positive
range. The DCM sets the zero-phase-skew point at the beginning of the delay line. This
produces a full delay line in one direction.
Both the PHASE_SHIFT attribute and the FINE_SHIFT_RANGE parameter need to be
considered to determine the limiting range of each application. The
section illustrates possible scenarios.
In variable and direct mode, the PHASE_SHIFT value can dynamically increment or
decrement as determined by PSINCDEC synchronously to PSCLK, when the PSEN input
is active.
Phase-Shift Examples
The following usage examples take both the PHASE_SHIFT attribute and
FINE_SHIFT_RANGE into consideration:
•
Phase Shift (ns) = (PHASE_SHIFT/256) × PERIOD
If PERIODCLKIN = 2 × FINE_SHIFT_RANGE, then the PHASE_SHIFT in fixed mode
is limited to ±128. In variable-positive mode, PHASE_SHIFT is limited to +128. In
variable-center mode the PHASE_SHIFT is limited to ±64.
Phase Shift (ns) = PHASE_SHIFT × DCM_TAP
CLKIN
denotes the effective CLKIN frequency.
www.xilinx.com
CLKIN
DCM Design Guidelines
Phase-Shift Examples
69
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