Quartus II Settings File Reference Manual - Altera

Chapter 6: Fitter Assignments 6–273
PROGRAMMABLE_POWER_MAXIMUM_HIGH_SPEED_ FRACTION_OF_USED_LAB_TILES
PROGRAMMABLE_POWER_MAXIMUM_HIGH_SPEED_
FRACTION_OF_USED_LAB_TILES
Type
Sets an upper limit on the fraction of the LAB tiles used by your design that can be
high-speed. Legal values must be between 0.0 and 1.0. The default value is 1.0. A
value of 1.0 means that there is no restriction on the number of high-speed tiles, and
the Fitter uses the minimum number needed to meet the timing requirements of your
design. Specifying a value lower than 1.0 might degrade timing quality, because some
timing critical resources might be forced into low-power mode.
String
Device Support
This setting can be used in projects targeting the following device families:
■ Arria II GZ
■ Stratix III
■ Stratix IV
■ Stratix V
Notes
This assignment is included in the Fitter report.
Syntax
set_global_assignment -name
PROGRAMMABLE_POWER_MAXIMUM_HIGH_SPEED_FRACTION_OF_USED_LAB_TILES
Default Value
1.0
June 2012 Altera Corporation Quartus Settings File
Reference Manual