Altera SDC and TimeQuest API - Manual (Page 94)

2–84 Chapter 2: SDC and TimeQuest API Package and Commands
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SDC and TimeQuest API Reference Manual © December 2009 Altera Corporation
get_clock_info
Usage
get_clock_info [-divide_by] [-duty_cycle] [-edge_shifts] [-edges] [-fall]
[-is_inverted] [-latency] [-master_clock] [-master_clock_pin] [-max] [-min]
[-multiply_by] [-name] [-nreg_neg] [-nreg_pos] [-offset] [-period] [-phase] [-rise]
[-targets] [-type] [-waveform] <clk_object>
Options
-divide_by: Return the frequency divider (to the base clock)
-duty_cycle: Return the duty cycle
-edge_shifts: Return a list of edge shifts that the specified edges are to undergo to
yield the final generated clock waveform
-edges: Return a list of integer representing edges from the source clock that are to
form edges of the generated clock
-fall: Return clock fall latency
-is_inverted: Return a boolean value to indicate if the generated clock is inverted
-latency: Return clock latency
-master_clock: Return the master clock name
-master_clock_pin: Return the master clock source pin
-max: Return max clock latency
-min: Return min clock latency
-multiply_by: Return the frequency multiplier (to the base clock)
-name: Return the clock name
-nreg_neg: Return number of registers negatively clocked by clock
-nreg_pos: Return number of registers positively clocked by clock
-offset: Return the clock offset
-period: Return the clock period
-phase: Return the clock phase
-rise: Return clock rise latency
-targets: Return the clock targets collection
-type: Return the clock type
-waveform: Return the waveform (rise time and fall time)
<clk_object>: Clock object
Description
Returns information about the specified clock (referenced by clock ID). Clock IDs can be obtained by Tcl
commands such as get_clocks.
The "-type" option returns "clk".
Options "-name", "-type", "-period", "-duty_cycle", "-waveform", "-edges", "-edge_shifts", "-multiply_by",
"-divide_by", "-is_inverted", "-latency", "-master_clock", and "-targets" are mutually exclusive. The
"-latency" option requires a specified "-max" or "-min" option as well as a "-rise" or "-fall" option.