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LinXiaoling
Joined: 25 Feb 2008
Posts: 28
Helped: 2
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 21 Aug 2008 6:59 DFT Compiler problem |
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Hi,
during the DFT design, there comes a problem:Bus gate xxx failed Z state ability check. the cause may be the bidirectional ports in the design.but I don't know how to handle it.pls help me,thx.
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feel_on_on
Joined: 29 Apr 2005
Posts: 260
Helped: 1
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21 Aug 2008 10:31 DFT Compiler problem |
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the Bus is a bidirectional ports?
or you can upload a example ,I will help you to solve it
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21 Aug 2008 10:31 Ads |
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LinXiaoling
Joined: 25 Feb 2008
Posts: 28
Helped: 2
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22 Aug 2008 9:06 Re: DFT Compiler problem |
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THX!
my design is the top design that including bidirectional IO pads.there exists pre-dft DRC warnings on those pads.
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santhosh007
Joined: 27 Aug 2008
Posts: 122
Helped: 26
Location: Bangalore
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28 Aug 2008 7:50 Re: DFT Compiler problem |
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make sure that the only one driver is driving the bidi IO during test mode. that will solve contention issue and stabiltiy check.
simple solution would be : gate bidi enable with test mode signal. whenever test mode is 1, it will be in output mode.
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