PDC syntax conventions

The following table shows the typographical conventions that are used for the PDC command syntax.

Syntax Notation	Description
command -argument	Commands and arguments appear in Courier New typeface.
variable	Variables appear in blue, italic Courier New typeface. You must substitute an appropriate value for the variable.
[-argument value] [variable]+	Optional arguments begin and end with a square bracket with one exception: if the square bracket is followed by a plus sign (+), then users must specify at least one argument. The plus sign (+) indicates that items within the square brackets can be repeated. Do not enter the plus sign character.

Note: PDC commands are case sensitive. However, their arguments are not.

Examples

Syntax for the assign_local_clock (Axcelerator) command followed by a sample command:

assign_local_clock -type value -net netname [LocalClock_region]+

assign_local_clock -type hclk -net reset_n tile1a tile2a

Syntax for the set_io (Axcelerator) command followed by a sample command:

set_io portname [-iostd value][-register value][-out_drive value][-slew value][-res_pull value][-out_load value][-pinname value][-fixed value][-in_delay value]

set_io ADDOUT2 \

-iostd PCI \

-register yes \

-out_drive 16 \

-slew high \

-out_load 10 \

-pinname T21 \

-fixed yes

Wildcard Characters

You can use the following wildcard characters in names used in PDC commands:

Wildcard	What it does
\	Interprets the next character literally
?	Matches any single character
*	Matches any string
[]	Matches any single character among those listed between brackets (that is, [A-Z] matches any single character in the A-to-Z range)

Note: The matching function requires that you add a slash (\) before each slash in the port, instance, or net name when using wildcards in a PDC command and when using wildcards in the Find feature of the MultiView Navigator. For example, if you have an instance named “A/B12” in the netlist, and you enter that name as “A\\/B*” in a PDC command, you will not be able to find it. In this case, you must specify the name as A\\\\/B*.

Special Characters ([ ], { }, and \)

Sometimes square brackets ([ ]) are part of the command syntax. In these cases, you must either enclose the open and closed square brackets characters with curly brackets ({ }) or precede the open and closed square brackets ([ ]) characters with a backslash (\). If you do not, you will get an error message.

For example:

set_iobank {mem_data_in[57]} -fixed no 7 2

set_iobank mem_data_in\[57\] -fixed no 7 2

Entering Arguments on Separate Lines

To enter an argument on a separate line, you must enter a backslash (\) character at the end of the preceding line of the command as shown in the following example: