我用innovus导入项目的global文件时候,提示了这个warning:**WARN: (IMPFP-3961): The techSite 'RASP256X8M8s' has no related cells in LEF/OA library. Cannot make calculations for this site type unless cell models of this type exist in the LEF/OA library. If the SITE is not used by the library you can ignore this warning or remove the SITE definition from the LEF/OA to avoid this message.
我看了IMPFP-3961的详细信息,
IMPFP-3961(15.20) IMPFP-3961(15.20)
NAME
IMPFP-3961
SYNOPSIS
The techSite '%s' has no related cells in LEF/OA library. Cannot make
calculations for this site type unless cell models of this type exist
in the LEF/OA library. If the SITE is not used by the library you can
ignore this warning or remove the SITE definition from the LEF/OA to
avoid this message.
DESCRIPTION
This warning occurs when a site is defined without being referenced by
any cell in LEF/OA library. The tool uses the SITE definition along
with the library cells which use the SITE to validate the power and
ground pins are defined consistently so followpin routing will be suc-
cessful.
Example:
* The following example shows a predefined SITE 'core' which is refer-
enced by a
cell 'AND0':
SITE core
SITE 0.180 BY 1.114 ;
SYMMETRY Y ;
CLASS CORE ;
END core
MACRO AND0
CLASS CORE ;
SIZE 0.360 BY 2.228 ;
SITE core;
---------
...
END AND0
IMPFP-3961(15.20)
依据上面的example,我看了下我的Lef文件,应该是也有这样的定义的。那为什么还报这个warning呢?
VERSION 5.4 ;
SITE RASP256X8M8
CLASS CORE ;
SYMMETRY X Y R90 ;
SIZE 244.980 BY 194.400 ;
END RASP256X8M8
MACRO RASP256X8M8
CLASS BLOCK ;
FOREIGN RASP256X8M8 0.000 0.000 ;
ORIGIN 0.000 0.000 ;
SIZE 244.980 BY 194.400 ;
SYMMETRY X Y R90 ; SITE RASP256X8M8 ;
PIN AD[0]
DIRECTION INPUT ;
USE SIGNAL ;
PORT
LAYER M2 ;
RECT 108.380 12.000 108.860 12.760 ;
END
END AD[0]
PIN AD[1]
DIRECTION INPUT ;
USE SIGNAL ;
PORT
LAYER M2 ;
RECT 111.500 12.000 111.980 12.760 ;
END
END AD[1]