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AR# 10890

3.1i Virtex-II MAP - Invalid pack errors may occur if RLOCs are used with RAM64x2 or RAM128x1


Keywords: pack, RLOC, RAM64x2, RAM128x1, ERROR:Pack:311

Urgency: Standard

General Description:
There are problems with the way MAP handles RAM64x2 or RAM128x1 symbols if
RLOCs are applied to them. These result in invalid pack errors such as:

ERROR:Pack:311 - Unable to resolve the conflicts between two or more
collections of symbols which have restrictive placement or routing
requirements. The two collections are:
A wide function implementation starting with F7 multiplexer "BU47/F7.S1"
The RPM "hset"
The symbol MUXF6 symbol "BU47/F6.S0" (Output Signal = BU47/F6.S0) belongs to
more than one collection, forcing the collections to be combined.
Failure 1: Unable to combine the following symbols into a single slice.
MUXF5 symbol "BU80" (Output Signal = N1738)
FLOP symbol "BU81" (Output Signal = INT_QSPO<6>)
LUT symbol "BU78" (Output Signal = N1687)
LUT symbol "BU79" (Output Signal = N1689)
MUXF6 symbol "BU47/F6.S2" (Output Signal = BU47/F6.S2)
MUXF5 symbol "BU47/F5.S2" (Output Signal = BU47/F5.S2)
The symbols have incompatible RLOC attributes.
Failure 2: Unable to combine the following symbols into a single slice.
LUT symbol "BU82" (Output Signal = N1787)
LUT symbol "BU83" (Output Signal = N1789)
MUXF5 symbol "BU84" (Output Signal = N1838)
FLOP symbol "BU85" (Output Signal = INT_QSPO<7>)
MUXF5 symbol "BU47/F5.S3" (Output Signal = BU47/F5.S3)
The symbols have incompatible RLOC attributes.


This problem is fixed in the latest 3.1i Service Pack available at:
http://support.xilinx.com/support/techsup/sw_updates. The first
service pack containing the fix is 3.1i Service Pack 7.

AR# 10890
Date 08/19/2002
Status Archive
Type General Article