Altera Quartus II Settings File - Manual (Page 736)

SLEW_RATE
Implements control of low-to-high/high-to-low transitions on output pins to help reduce switching noise.
When a large number of output pins switch simultaneously, pins that use the lower Slew Rate option help
reduce switching noise. This option is ignored if it is applied to anything other than an output or
bidirectional pin, or a top-level design entity containing output or bidirectional pins. Note that using this
option may increase the delay for output or bidir pins, which can affect slack on Tco paths for the pins
this is applied to.
Type
Integer
Device Support
This setting can be used in projects targeting any Altera device family.
INTEGER_RANGE
0, 3
Notes
This assignment supports Fitter wildcards.
This assignment is included in the Fitter report.
Syntax
set_global_assignment -name SLEW_RATE -entity <entity name> <value>
set_instance_assignment -name SLEW_RATE -to <to> -entity <entity name>
<value>
set_global_assignment -name SLEW_RATE <value>
Example
set_instance_assignment -name SLEW_RATE 0 -to pin
See Also
IO_STANDARD CURRENT_STRENGTH_NEW OUTPUT_TERMINATION
736 SLEW_RATE
MNL-Q21005
2015.05.04
Altera Corporation Quartus Settings File Reference Manual
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