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Subject: Buffer constant nets in RC
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myazdani
Posts: 0
Online: User is Offline
2/07/2007 1:56 PM  
Hi guys,

Some of my output pins are tied to ground, and that is causing problems in extraction. In dc_shell you could insert inverters/buffers in the constant lines to prevent this problem. I think it used to be called set_fix_multiple_port_nets or something with a buffer_constants option.

Does RC have such capability or an attribute we could set?

Thanks,
synthman
Posts: 17
Online: User is Offline
2/07/2007 2:22 PM  
There is a utility called insert_tiehilo_cell to replace constant nets with tie cells. To use it, you need to source the load_etc.tcl script first.
myazdani
Posts: 0
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2/09/2007 10:05 AM  
Thanks that would work. I tried another way "remove_assigns" command worked for me since the assigns were in the RTL code.
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Forums > Digital IC > Synthesis and test > Buffer constant nets in RC


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