set_annotated_delay (::quartus::sdc

Tcl Package and Version

Syntax

set_annotated_delay [-h | -help] [-long_help] [-cell] [-ff] [-fr] [-from <names> ] [-max] [-min] [-net] [-operating_conditions <operating_conditions> ] [-rf] [-rr] [-to <names> ] <delay>

Arguments

-h | -help

Short help

-long_help

Long help with examples and possible return values

-cell

Specifies that cell delay must be set

-ff

Specifies that FF delay must be set

-fr

Specifies that FR delay must be set

-from <names>

Valid source pins or ports (string patterns are matched using Tcl string matching)

-max

Specifies that only max delay should be set

-min

Specifies that only min delay should be set

-net

Specifies that net delay must be set

-operating_conditions <operating_conditions>

Operating conditions Tcl object

-rf

Specifies that RF delay must be set

-rr

Specifies that RR delay must be set

-to <names>

Valid destination pins or ports (string patterns are matched using Tcl string matching)

<delay>

The delay value in default time units

Description

This command can suppress timing failures and should only be used when advised by Intel Premier Support.

Annotates the cell delay between two or more
pins/nodes on a cell, or the interconnect delay
between two or more pins on the same net, in the
current design. Multiple transition edges (rr, fr, rf,
ff) can be specified. If no transition is specified,
then the given delay is assigned to all four
values. If either -from or -to (or both) values are
left unspecified, the missing value or values are
substituted by an "*" character. Options -max and -min
allow users to specify max or only min delay. If
neither -max or -min is specified, both delays are
set. Using this command to reduce delay pessimism
might lead to optimistic results from timing analysis.

The values for -from and -to are either collections or
a Tcl list of wildcards used to create collections of
appropriate types.  The values used must follow
standard Tcl or Timing Analyzer-extension substitution
rules. See help for the use_timing_analyzer_style_escaping
command for details.

Delay annotation is deferred until the next time
update_timing_netlist is called. To remove annotated
delays, use remove_annotated_delay command.

This assignment is for timing analysis only, and is
not considered during timing-driven compilation.

Example Usage

set_annotated_delay -cell 100 -from A|B|C|datain -to A|B|C|combout -rr -ff
set_annotated_delay -net 100 -to A|carryin
update_timing_netlist

# To clear all net delays
set_annotated_delay -net 0
update_timing_netlist

# To remove all annotated delay assignments
remove_annotated_delay -all
update_timing_netlist

Return Value

Code Name

Code

String Return

TCL_OK

0

INFO: Operation successful

TCL_ERROR

1

ERROR: Timing netlist does not exist. Use create_timing_netlist to create a timing netlist.

Tcl Package and Version	Belongs to ::quartus::sdc_ext 1.0
Syntax	`set_annotated_delay [-h \| -help] [-long_help]` `[-cell]` `[-ff]` `[-fr]` `[-from` <names> `]` `[-max]` `[-min]` `[-net]` `[-operating_conditions` <operating_conditions> `]` `[-rf]` `[-rr]` `[-to` <names> `]` <delay>
Arguments	`-h \| -help`		Short help
	`-long_help`		Long help with examples and possible return values
	`-cell`		Specifies that cell delay must be set
	`-ff`		Specifies that FF delay must be set
	`-fr`		Specifies that FR delay must be set
	`-from` <names>		Valid source pins or ports (string patterns are matched using Tcl string matching)
	`-max`		Specifies that only max delay should be set
	`-min`		Specifies that only min delay should be set
	`-net`		Specifies that net delay must be set
	`-operating_conditions` <operating_conditions>		Operating conditions Tcl object
	`-rf`		Specifies that RF delay must be set
	`-rr`		Specifies that RR delay must be set
	`-to` <names>		Valid destination pins or ports (string patterns are matched using Tcl string matching)
	<delay>		The delay value in default time units
Description	This command can suppress timing failures and should only be used when advised by Intel Premier Support. Annotates the cell delay between two or more pins/nodes on a cell, or the interconnect delay between two or more pins on the same net, in the current design. Multiple transition edges (rr, fr, rf, ff) can be specified. If no transition is specified, then the given delay is assigned to all four values. If either -from or -to (or both) values are left unspecified, the missing value or values are substituted by an "*" character. Options -max and -min allow users to specify max or only min delay. If neither -max or -min is specified, both delays are set. Using this command to reduce delay pessimism might lead to optimistic results from timing analysis. The values for -from and -to are either collections or a Tcl list of wildcards used to create collections of appropriate types. The values used must follow standard Tcl or Timing Analyzer-extension substitution rules. See help for the use_timing_analyzer_style_escaping command for details. Delay annotation is deferred until the next time update_timing_netlist is called. To remove annotated delays, use remove_annotated_delay command. This assignment is for timing analysis only, and is not considered during timing-driven compilation.
Example Usage	set_annotated_delay -cell 100 -from A\|B\|C\|datain -to A\|B\|C\|combout -rr -ff set_annotated_delay -net 100 -to A\|carryin update_timing_netlist # To clear all net delays set_annotated_delay -net 0 update_timing_netlist # To remove all annotated delay assignments remove_annotated_delay -all update_timing_netlist
Return Value	Code Name	Code	String Return
	TCL_OK	0	INFO: Operation successful
	TCL_ERROR	1	ERROR: Timing netlist does not exist. Use create_timing_netlist to create a timing netlist.

set_annotated_delay (::quartus::sdc_ext)