Quartus II Settings File Reference Manual - Altera

Chapter 6: Fitter Assignments 6–315
SLOW_SLEW_RATE
SLOW_SLEW_RATE
Type
Implements slow low-to-high or 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 Slow 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
increases the delay for output or bidir pins, which can affect slack on t CO paths for the
pins to which you apply this option.
Boolean
Device Support
This setting can be used in projects targeting the following device families:
■ Cyclone
■ EPC1
■ EPC2
■ Enhanced Configuration Devices
■ FLEX10KB
■ FLEX8000
■ MAX II
■ MAX V
■ MAX3000A
■ MAX7000A
■ MAX7000AE
■ MAX7000B
■ MAX7000S
■ MAX9000
■ Stratix
■ Stratix GX
Notes
This assignment supports wildcards.
This assignment is included in the Fitter report.
Syntax
set_global_assignment -name SLOW_SLEW_RATE -entity
set_instance_assignment -name SLOW_SLEW_RATE -to -entity
June 2012 Altera Corporation Quartus Settings File
Reference Manual