set_input_delay (::quartus::project)

Tcl Package and Version

Syntax

set_input_delay [-h | -help] [-long_help] [-clk_ref <clock> ] [-clock_fall] [-comment <comment> ] [-disable] [-fall] [-max] [-min] [-remove] [-rise] [-tag <data> ] -to <input_pin> [ <value> ]

Arguments

-h | -help

Short help

-long_help

Long help with examples and possible return values

-clk_ref <clock>

Reference clock name

-clock_fall

Option to specify that delay is relative to falling edge of reference clock

-comment <comment>

Comment

-disable

Option to disable assignment

-fall

Option applies to falling edge

-max

Option to set maximum delay

-min

Option to set minimum delay

-remove

Option to remove input delay requirement

-rise

Option applies to rising edge

-tag <data>

Option to tag data to this assignment

-to <input_pin>

Input pin name or input assignment group

<value>

Input delay value after rise of reference clock

Description

Specifies the required minimum or maximum delay on the input 
pin or input assignment group as specified by the "-to" option. 
The Quartus Prime(R) timing analysis propagates this delay and 
checks it against the actual delay. For more information 
about assignment groups, type "assignment_group -h".

The "assignment_group" command replaces the deprecated
"timegroup" command in ::quartus::project, version 5.0.

If both "-min" and "-max" options are not used, then the
assignment is set for both minimum and maximum delay.

The "-clock_fall" option specifies that the input delay is 
relative to the falling edge of the reference clock. The 
rising edge of the reference clock is the default.

The <value> is the input delay after the rise or fall of the 
reference clock. If you do not specify the "-clk_ref" option, 
all clocks are assumed to be reference clocks by default.

The format of <value> is "<numerical value><time unit>", 
for example, "7.55ns". 

The following table shows the available time units:

Time Unit                  Description
----------------------     ------------------
s                          second(s)
ms                         millisecond(s)
us                         microsecond(s)
ns                         nanosecond(s)
ps                         picosecond(s)
fs                         femtosecond(s)
Hz                         Hertz
KHz                        KiloHertz
MHz                        MegaHertz
GHz                        GigaHertz

Example Usage

## Specify the required minimum and maximum input
## delays on the input pin named "ipin" relative to
## the rising edge of the reference clock named "clk1"
set_input_delay 2ns -to "ipin" -clk_ref "clk1"
## Or, equivalently,
set_input_delay 2ns -to "ipin" -clk_ref "clk1" -min -max

## Specify the required minimum input delay on 
## the input pin named "ipin" relative to the
## falling edge of the reference clock named "clk1"
set_input_delay 2ns -to "ipin" -clk_ref "clk1" -min -clock_fall

## Specify the required maximum input delay on
## input pins with names that start with "i"
## except those that start with "ibus"
assignment_group "input_pins" -add_member "i*" -add_exception "ibus*"
set_input_delay 2ns -to "input_pins" -max

Return Value

Code Name

Code

String Return

TCL_OK

0

INFO: Operation successful

TCL_ERROR

1

ERROR: Can't find active revision name. Make sure there is an open, active revision name.

TCL_ERROR

1

ERROR: Entity does not exist or uses illegal name characters: <string>. Specify a legal entity name.

TCL_ERROR

1

ERROR: Can't set revision: <string>. Make sure there is an open, active revision name.

TCL_ERROR

1

ERROR: You must open a project before you can use this command.

TCL_ERROR

1

ERROR: Revision does not exist: <string>. Specify a legal revision name using the -<string> option.

Tcl Package and Version	Belongs to ::quartus::project 5.0
Syntax	`set_input_delay [-h \| -help] [-long_help]` `[-clk_ref` <clock> `]` `[-clock_fall]` `[-comment` <comment> `]` `[-disable]` `[-fall]` `[-max]` `[-min]` `[-remove]` `[-rise]` `[-tag` <data> `]` `-to` <input_pin> `[` <value> `]`
Arguments	`-h \| -help`		Short help
	`-long_help`		Long help with examples and possible return values
	`-clk_ref` <clock>		Reference clock name
	`-clock_fall`		Option to specify that delay is relative to falling edge of reference clock
	`-comment` <comment>		Comment
	`-disable`		Option to disable assignment
	`-fall`		Option applies to falling edge
	`-max`		Option to set maximum delay
	`-min`		Option to set minimum delay
	`-remove`		Option to remove input delay requirement
	`-rise`		Option applies to rising edge
	`-tag` <data>		Option to tag data to this assignment
	`-to` <input_pin>		Input pin name or input assignment group
	<value>		Input delay value after rise of reference clock
Description	Specifies the required minimum or maximum delay on the input pin or input assignment group as specified by the "-to" option. The Quartus Prime(R) timing analysis propagates this delay and checks it against the actual delay. For more information about assignment groups, type "assignment_group -h". The "assignment_group" command replaces the deprecated "timegroup" command in ::quartus::project, version 5.0. If both "-min" and "-max" options are not used, then the assignment is set for both minimum and maximum delay. The "-clock_fall" option specifies that the input delay is relative to the falling edge of the reference clock. The rising edge of the reference clock is the default. The <value> is the input delay after the rise or fall of the reference clock. If you do not specify the "-clk_ref" option, all clocks are assumed to be reference clocks by default. The format of <value> is "<numerical value><time unit>", for example, "7.55ns". The following table shows the available time units: Time Unit Description ---------------------- ------------------ s second(s) ms millisecond(s) us microsecond(s) ns nanosecond(s) ps picosecond(s) fs femtosecond(s) Hz Hertz KHz KiloHertz MHz MegaHertz GHz GigaHertz
Example Usage	## Specify the required minimum and maximum input ## delays on the input pin named "ipin" relative to ## the rising edge of the reference clock named "clk1" set_input_delay 2ns -to "ipin" -clk_ref "clk1" ## Or, equivalently, set_input_delay 2ns -to "ipin" -clk_ref "clk1" -min -max ## Specify the required minimum input delay on ## the input pin named "ipin" relative to the ## falling edge of the reference clock named "clk1" set_input_delay 2ns -to "ipin" -clk_ref "clk1" -min -clock_fall ## Specify the required maximum input delay on ## input pins with names that start with "i" ## except those that start with "ibus" assignment_group "input_pins" -add_member "i" -add_exception "ibus" set_input_delay 2ns -to "input_pins" -max
Return Value	Code Name	Code	String Return
	TCL_OK	0	INFO: Operation successful
	TCL_ERROR	1	ERROR: Can't find active revision name. Make sure there is an open, active revision name.
	TCL_ERROR	1	ERROR: Entity does not exist or uses illegal name characters: <string>. Specify a legal entity name.
	TCL_ERROR	1	ERROR: Can't set revision: <string>. Make sure there is an open, active revision name.
	TCL_ERROR	1	ERROR: You must open a project before you can use this command.
	TCL_ERROR	1	ERROR: Revision does not exist: <string>. Specify a legal revision name using the -<string> option.