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Subject: Set cell dont use
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DN
Posts: 10
Online: User is Offline
2/15/2006 2:52 AM  
I'm trying to forbid some cells to use in Encounter during optimize
just like below:

dbSetIsCellDontUse [dbGetCellByName bfx05pdv] 1
dbSetIsCellDontUse [dbGetCellByName ivx05pdv] 1

But during the optimisatiom FE did still use these cells.
Also when I looked at the dontusecells list, these cells are
defined inside.
Do you have any suggestions?
lisiang
Moderator
Posts: 48
Online: User is Offline
2/15/2006 9:25 AM  
add the following to your sdc file should do it.

set_dont_use "bfx05pdv ivx05pdv" TRUE




li siang
yasonwang
Posts: 0
Online: User is Offline
2/22/2006 9:44 PM  
After using db command, you must use "setupfootprint" to update the cell's footprint usage prior to using optDesign.

BTW, some commands may refresh the dontuse setting on your internal command setting. So it is safe to use sdc. If you insist on using db command, you can use it immediately before optimization command.
EngHan
Posts: 65
Online: User is Offline
3/06/2006 11:49 AM  
Hi,

The reply is late, but maybe useful for reference.

It is common to load both min and max library into Encounter. A side effect in this is that when setting "setDontUse", you have to set it for both libraries! Do something like

setDontUse someLibbc/DELAY1 true
setDontUse someLibwc/DELAY1 true

Regards,
Eng Han
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