Answers Database

MAP, PAR, PPR: Constraining signals to unbonded pads in M1 and XACT (naming convention is different)


Record #2647

Product Family:  Software

Product Line:  Merged Core

Problem Title:
MAP, PAR, PPR: Constraining signals to unbonded pads in M1 and XACT
(naming convention is different)



Problem Description:
Keywords: unbonded, ppr, map, xact

Urgency: standard

General Description:
In the XACT tools location constraints for unbonded pads used
the syntax of "Uxx", where "xx" corresponded to the pad
location for the unbonded I/O.

In the M1 tools location constraints for unbonded pads has
been changed to the format "UNBxx".


Solution 1:

To constrain an unbonded pad to a specific location in your
schematic design, add the "LOC=UNBxx" attribute to the UPAD
component on your schematic.

For example to constrain a unbonded pad to pad location 66 do
the following:

   LOC=UNB66

In order to constrain an unbonded pad to a specific location
in a user constraint file (.ucf), add the following line to
your UCF file:

   NET "NetName" LOC = "UNBxx"

where "NetName" is the name of the net connected to the UPAD.



End of Record #2647