Altera Quartus II Settings File - Manual (Page 956)

FAST_OUTPUT_REGISTER
Implements an output 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 register in the LAB adjacent to the I/O cell it is feeding.Turning on the Fast Output 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 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_REGISTER -to <to> -entity <entity
name> <value>
956 FAST_OUTPUT_REGISTER
MNL-Q21005
2015.05.04
Altera Corporation Quartus Settings File Reference Manual
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