User guide

13-20
SDF Backannotation
TYPICAL
Annotates the typical delay value
MAXIMUM
Annotates the maximum delay value
TOOL_CONTROL
Delay value is determined by the command line options of the
Verilog tool (+mindelays, +typdelays, or +maxdelays)
The default for min_typ_max is TOOL_CONTROL.
Syntax:
MTM = MINIMUM | TYPICAL | MAXIMUM | TOOL_CONTROL;
Example:
MTM=MAXIMUM;
scale_command:
• SCALE_FACTORS - Set of three real number multipliers that
scale the timing information in the SDF file to the minimum, typical,
and maximum timing information that is backannotated to the
Verilog tool. The multipliers each represent a positive real number,
for example 1.6:1.4:1.2
• SCALE_TYPE - Selects one of the following keywords to scale
the timing specification in the SDF file to the minimum, typical,
and maximum timing that is backannotated to the Verilog tool:
FROM_MINIMUM
Scales from the minimum timing specification in the SDF file.
FROM_TYPICAL
Scales from the typical timing specification in the SDF file.