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how to write SDC constrain file with primetime

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absak

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primetime sdc

Can someone tell me how to generate an SDC constarin file with primetime

Added after 3 hours 7 minutes:


Can someone help me
 

write sdc

hello

trying using this command if ur using TcL scripts

write_sdc <file_name>.sdc
 

writing sdc constraints

yeah ....
write_sdc filename.sdc
shud work,,,,,,
this command works well in dc too

prime shud nt give any errors for this..:)
more over .. wht is the necessity of writing SDC file when v r having tcl script...
thanq
Shiv
 

sdc jitter

read in design
set input constraints like drive strength and arrival time.
set output constraints like load and output delay times.
define all clocks
define any false path and multi-cycle path in the design.
set clock skew and jitter tolerances.
define all input/output timing relationships between clock and ports
then use write sdc command

If you dont setup your design, the sdc output is not going to be correct.
 

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