Fast_output_enable_register – Altera Quartus II Settings File User Manual
Page 955
FAST_OUTPUT_ENABLE_REGISTER
Implements an output enable register in a cell that has a fast, direct connection to an I/O pin. If such a
fast, direct connection to the I/O pin is not available in the I/O cell hardware, this option instructs the
Fitter to lock the output enable register in the LAB adjacent to the I/O cell it is feeding.Turning on the
Fast Output Enable Register option can help maximize I/O timing performance, for example, by
permitting fast clock-to-output times. Turning this option off for a particular signal prevents the Fitter
from implementing the signal automatically in an I/O cell or locking down the output enable register in
the LAB adjacent to the I/O cell. This option is ignored if it is applied to anything other than a register or
an output or bidirectional pin fed by a register.
Type
Boolean
Device Support
This setting can be used in projects targeting any Altera device family.
Notes
This assignment supports Fitter wildcards.
Syntax
set_instance_assignment -name FAST_OUTPUT_ENABLE_REGISTER -to
MNL-Q21005
2015.05.04
FAST_OUTPUT_ENABLE_REGISTER
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Quartus Settings File Reference Manual
Altera Corporation