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How to make Assura ignore tie-downs during LVS ?

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jimito13

jimito13

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Hello,

I am running LVS and i have no errors but the run cannot complete successfully as it gives the following error :

*ERROR* Device 'tdndsx(Generic)' on Layout is unbound to any Schematic device
*ERROR* Device 'tdpdnw(Generic)' on Layout is unbound to any Schematic device.
*ERROR*UnBound devices found

I do not have tie downs in my schematic but they exist in the layout.Is there any way to tell the assura not to consider the tie-downs during the check?My design kit IBM cms9flp.

Thanks in advance for any helpful answer.
 

Re: tie down LVS error

Your wells need to have their equivalent schematic representation as well. This is usually specific to your DK.
 

Re: tie down LVS error

can you be more specific?i am talking aboun tie downs (inversely biased diodes is the electrical symbol from the IBM design kit) and not about wells...if i understood your opinion is to place tie downs to the schematic as well,right?Is there any way to "tell" assura (with a switch or something else) to bypass this check?A colleague told me that there is a way to do that with calibre but he didn't known the way to do this with assura...
 

Re: tie down LVS error

You already know that the orthodox method is to include it in your schematic. Why try to cheat LVS?
 

Re: tie down LVS error

jimeece13 said:
Hello,

I am running LVS and i have no errors but the run cannot complete successfully as it gives the following error :

*ERROR* Device 'tdndsx(Generic)' on Layout is unbound to any Schematic device
*ERROR* Device 'tdpdnw(Generic)' on Layout is unbound to any Schematic device.
*ERROR*UnBound devices found

I do not have tie downs in my schematic but they exist in the layout.Is there any way to tell the assura not to consider the tie-downs during the check?My design kit IBM cms9flp.

Thanks in advance for any helpful answer.
Click to expand...

can you try adding a cell name in the ?ignoreCell list under the "Modify avParameters? I dont have the ibm kit, so I can't give you an example...
 

    jimito13

    jimito13

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Re: tie down LVS error

great wpchan05!absolutely helpful answer,i did what you suggested and worked :) Thanks again!
 

Re: tie down LVS error

Does anybody know how to tell mentor calibre to ignore tie-downs during LVS run?I am using the latest calibre version 2009.

Thanks in advance.
 

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