User guide

13-37
SDF Backannotation
Note:
In delay value lists in delay definition entries in an SDF file, you
can list one, two, three, or six delay values. VCS does not yet
support lists of twelve values, that also specify delays for
transitions to and from X.
Min:Typ:Max Delays
You can enter min:typ:max delay value triplets wherever you can
enter a delay specification. For example:
assign #(4:10:14) w1=r1;
Here the minimum delay value is 4, the typical delay value is 10, and
the maximum delay value is 14.
You can also enter min:typ:max delay value triplets in delay value in
entries for different kinds of delays in SDF files. For example, if an
SDF file specifies the following:
(CELL
(CELLTYPE "stim")
(INSTANCE stim)
(DELAY
(ABSOLUTE
(INTERCONNECT stim.left1.lout1
stim.right1.rightin(6:10:14))
)
)
)
The INTERCONNECT delay on the net that connects the specified
port instances has a minimum delay of 6, a typical delay of 10, and
a maximum delay of 14. You can enter min:typ:max delays for delay
values in other kinds of delays such as IOPATH or PORT.