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Development System Reference Guide www.xilinx.com 255
Speedprint Example Commands
R
–v (Specify Voltage)
–v voltage
The –v option specifies the operating voltage of the device in volts. If this option is omitted,
the worst-case voltage is used.
Speedprint Example Commands
The following table describes some example commands:
Speedprint Example Reports
Following is a portion of a speed grade report for a Virtex device. The following command
generates the displayed report:
speedprint v100e
Note the new section at the end of the report. This section provides adjustments for the I/O
values in the speed grade report according to the I/O standard you are using. These
adjustments model the delay reporting in the data sheet. To use these numbers, add the
adjustment for the standard you are using to the delays reported for the IOBs.
The default speed grade, temperature, and voltage settings are described at the beginning
of the file.
Block delay report for a: xv100e
Speed grade is: -8
Version id for speed file is: PRELIMINARY 1.60 2001-06-06 xilinx
This speed file supports voltage adjustments over the range of 1.700000
to 1.900000 volts.
Temperature adjustments are supported over the junction temperature
range of -40.000000 to 85.000000 degrees Celsius
Derated delay values for operating conditions within these limits are
available using this speed file.
This report prepared for default temperature and voltage.
Note - this report is intended to present the effect of different
speedgrades and voltage/temperature adjustments on block delays, for
specific situations use the timing analyzer report instead.
Command Description
speedprint Prints usage message
speedprint 2v80 Uses the default speed grade
speedprint –s -52v80
speedprint -s 5 2v80
Both displays block delays for
speed grade -5
speedprint –2v50e -v 1.9 -t 40 Uses default speed grade at 1.9
volts and 40 degrees C
speedprint v50e -min Displays data for the minimum
speed grade