Altera SDC and TimeQuest API - Manual (Page 41)

Chapter 2: SDC and TimeQuest API Package and Commands 2–31
sdc
© December 2009 Altera Corporation SDC and TimeQuest API Reference Manual
The -setup and -hold options allow the false path to only be applied to the corresponding setup/recovery
or hold/removal checks. The default if neither value is specified is to apply the false path to both -setup
and -hold.
The values of the -from, -to, -through, and other similar options are either collections or a Tcl list of
wildcards used to create collections of appropriate types. The values used must follow standard Tcl or
TimeQuest-extension substitution rules. See help for the use_timequest_style_escaping command for
details.
See help for the set_clock_groups command for information.
Example
# Set a false-path between two unrelated clocks
# See also set_clock_groups
set_false_path -from [get_clocks clkA] -to [get_clocks clkB]
# Set a false-path for a specific path
set_false_path -from [get_pins regA|clk] -to [get_pins regB|aclr]
# Set a false-path from a node to a falling clock
set_false_path -from [get_pins regA|clk] -fall_to [get_clocks clkB]