User guide

13-21
SDF Backannotation
FROM_MAXIMUM
Scales from the maximum timing specification in the SDF file.
FROM_MTM
Scales directly from the minimum, typical, and maximum timing
specifications in the SDF file.
Syntax:
SCALE_FACTORS = number : number : number ;
SCALE_TYPE = FROM_MINIMUM | FROM_TYPICAL | FROM_MAXIMUM |
FROM_MTM ;
Example:
SCALE_FACTORS=100:0:9;
SCALE_TYPE=FROM_MTM;
SCALE_FACTORS=1.1:2.1:3.1;
SCALE_TYPE=FROM_MINIMUM;
turnoff_command:
The turnoff_command keyword globally specifies which delays the
SDF annotator uses. It uses one of the following for a given object:
MINIMUM
Minimum of the rise and fall delay value.
MAXIMUM
Maximum of the rise and fall delay value.
AVERAGE
Average of the rise and fall delay value.
FROM_FILE
The SDF annotator uses the turn-off delays in the SDF file. If you
do not specify FROM_FILE or if you specify FROM_FILE, but the
SDF files does not contain the turn-off delay, the turn-off delay is
set to min (rise,fall).