13.33.64.1 Arguments

-period period_value

Specifies the clock period in nanoseconds. The value you specify is the minimum time over which the clock waveform repeats. The period_value must be greater than zero.

-name clock_name

Specifies the name of the clock constraint. You must specify either a clock name or a source.

-waveform edge_list

Specifies the rise and fall times of the clock waveform in ns over a complete clock period. There must be exactly two transitions in the list, a rising transition followed by a falling transition. You can define a clock starting with a falling edge by providing an edge list where fall time is less than rise time. If you do not specify -waveform option, the tool creates a default waveform, with a rising edge at instant 0.0 ns and a falling edge at instant (period_value/2)ns.

source_objects

Specifies the source of the clock constraint. The source can be ports, pins, or nets in the design. If you specify a clock constraint on a pin that already has a clock, the new clock replaces the existing one. You must specify either a source or a clock name.