RESERVED_SITES

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• "RESERVED_SITES Description"
• "RESERVED_SITES Architecture Support"
• "RESERVED_SITES Applicable Elements"
• "RESERVED_SITES Propagation Rules"
• "RESERVED_SITES Syntax Examples"

RESERVED_SITES Description

This constraint is only applicable to the modular design flow. The MODULE/RESERVED_SITES UCF constraint has the following syntax:

MODULE "module_name" RESERVED_SITES ="S1", "S2" ... ; 

This constraint specifies that the sites "S1", "S2" ... should all be considered available for placement of components of module module_name. The only types of sites that can be used in this constraint are those that can hold IOs, BRAMs or MULTs. This constraint will get translated in the PCF to one of two types of constraints depending on whether the module module_name is being implemented or not. When module module_name is being implemented as the active module then this constraint is translated into the following PCF constraints:

COMPGRP "X" COMP "C1" COMP "C2" ... ; 
COMPGRP "X" LOCATE = SITE "S1" SITE "S2" ... ; 

When some module other than module_name is being implemented as the active module, this constraint is translated into the following PCF constraint:

PROHIBIT SITE "S1" SITE "S2" ... ; 

The use of this constraint will then guarantee that the specified sites can only have components placed into them from the specified module.

Virtex	Yes
Virtex-E	Yes
Spartan-II	Yes
Spartan-IIE	Yes
Virtex-II	Yes
Virtex-II Pro	Yes
Spartan	No
SpartanXL	No
XC4000X	No
XC4000E	No
XC9500, XC9500XL, XC9500XV	No
CoolRunner	No
CoolRunner II	No

RESERVED_SITES Architecture Support

RESERVED_SITES Applicable Elements

Sites (RAMS, TBUFS, MULTS, IOBS) (Cannot be used with slices)

RESERVED_SITES Propagation Rules

See the "RESERVED_SITES Description" section.

RESERVED_SITES Syntax Examples

ECS Schematic Editor

Not applicable.

VHDL

Not applicable.

Verilog

Not applicable.

ABEL

Not applicable.

NCF

Not applicable.

UCF

MODULE "module_name" RESERVED_SITES ="S1", "S2" ... ; 

Xilinx Constraints Editor

Not applicable.

PCF

The UCF syntax is translated into the following PCF syntax:

COMPGRP "X" COMP "C1" COMP "C2" ... ; 
COMPGRP "X" LOCATE = SITE "S1" SITE "S2" ... ; 

XST Constraint File

Not applicable.

FPGA Express Constraints Editor

Not applicable.

Floorplanner

Not applicable.

FPGA Editor

Not applicable.

XST Command Line

Not applicable.

Project Navigator

Not applicable.