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VHDL - set dont touch attribute in xilinx xst? |
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06-19-2009, 03:43 PM
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#1 |
set dont touch attribute in xilinx xst?
Is there a "set_dont_touch" equaivalent version of Xilinx Xst attribute. Or is it only in synopsys? Serkan |
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06-19-2009, 11:24 PM
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#2 |
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Posts: n/a
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Re: set dont touch attribute in xilinx xst?
On Jun 19, 7:43*am, Serkan <ok...@su.sabanciuniv.edu> wrote:
> * *Is there a "set_dont_touch" equaivalent version of Xilinx Xst > attribute. Or is it only in synopsys? If you are trying to preserve a wire, the attribute is keep. So if you are trying to set a don't signal T1, T2 : std_logic ; Attribute keep : boolean ; Attribute keep of T1, T2 : signal is true ; Cheers, Jim SynthWorks VHDL Training JimLewis |
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06-22-2009, 07:39 AM
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#3 |
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Posts: n/a
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Re: set dont touch attribute in xilinx xst?
thank you for your answer. best regards JimLewis wrote: > On Jun 19, 7:43*am, Serkan <ok...@su.sabanciuniv.edu> wrote: > > * *Is there a "set_dont_touch" equaivalent version of Xilinx Xst > > attribute. Or is it only in synopsys? > > If you are trying to preserve a wire, the attribute is keep. > So if you are trying to set a don't > > signal T1, T2 : std_logic ; > > Attribute keep : boolean ; > Attribute keep of T1, T2 : signal is true ; > > > Cheers, > Jim > SynthWorks VHDL Training Serkan |
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