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  3. Delay values in SDF file

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Delay values in SDF file

archive
archive over 18 years ago

Hello,

When a timing arch of a cell has COND expressions, what delay value of these conditional expression is used for setup and hold analysis?
Considering the example below, what delay value would be used by a timing analyzer to report delay of this cell considering timing arch C -> Q?

#####
(CELL
(CELLTYPE "ON21LX1")
(INSTANCE gbl_slave_test/g310)
(DELAY
(ABSOLUTE
(IOPATH C Q (0.076::0.076) (0.047::0.047))
(COND ((A==1'b1)&&(B==1'b1)) (IOPATH C Q (0.076::0.076) (0.047::0.047)))
(COND ((A==1'b1)&&(B==1'b0)) (IOPATH C Q (0.078::0.078) (0.057::0.057)))
(COND ((A==1'b0)&&(B==1'b1)) (IOPATH C Q (0.079::0.079) (0.076::0.076)))
(IOPATH B Q (0.106::0.106) (0.092::0.092))
(IOPATH A Q (0.082::0.082) (0.076::0.076))
)
)
)
#####

Can anyone help me?

Regards,
Cristiano.


Originally posted in cdnusers.org by clsantos
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