[SOLVED] is this a correct way to Add +neg_tchk to consider Negative Delay value

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abu9022

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HI friends,

I use the following command

Code: 
write_sdf iu_verilog7ns.sdf

and got the following error

Code: 
Warning-[SDFCOM_NNTC] Need timing check option +neg_tchk
./leon/iu_gates.sdf, 102729
module: SDFF_X1, "instance: TBLEON.TB.P0.LEON0.MCORE0.PROC0.IU0.IU1.iu2.\tr_reg[1][MASK][17] "
  SDF Error: Negative HOLD value replaced by 0.
  Add +neg_tchk to consider Negative delay value.

can you check below command is correct way to add +neg_tchk

Code: 
write_sdf -version 3.0 +neg_tchk -o junk.sdf
 
Last edited:

Check out your simulator options at the command terminal...<Command_name> -help should give you all options I suppose...
 
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