Quartus II Settings File Reference Manual - Altera

6–74 Chapter 6: Fitter Assignments
DECREASE_INPUT_DELAY_TO_OUTPUT_REGISTER
DECREASE_INPUT_DELAY_TO_OUTPUT_REGISTER
Type
Decreases the propagation delay from the interior of the device to the data input of
the output register implemented in an I/O cell. This is an advanced option that
should be used only after you have compiled a project, checked the I/O timing, and
determined that the timing is unsatisfactory. For detailed information on how to use
this option, refer to the data sheet for the device family. This option is ignored if it is
applied to anything other an output or bidirectional pin that is associated with an
output register implemented in an I/O cell.
Enumeration
■ Off
■ On
Device Support
This setting can be used in projects targeting the following device families:
■ Stratix
■ Stratix GX
Notes
This assignment supports wildcards.
Syntax
set_instance_assignment -name DECREASE_INPUT_DELAY_TO_OUTPUT_REGISTER -to
-entity
Old Names
This variable also has the following name(s) in some earlier versions of the Quartus II
software:
DELAY_SETTING_TO_CORE_TO_OUTPUT_REGISTER
Quartus Settings File June 2012 Altera Corporation
Reference Manual