5.34.113.7 Arguments

-name name

Specifies the name of the clock constraint.

-source reference_pin

Specifies the reference pin in the design from which the clock waveform is to be derived.

-divide_by divide_factor

Specifies the frequency division factor. For instance if the divide_factor is equal to 2, the generated clock period is twice the reference clock period.

-multiply_by multiply_factor

Specifies the frequency multiplication factor. For instance if the multiply_factor is equal to 2, the generated clock period is half the reference clock period.

-invert

Specifies that the generated clock waveform is inverted with respect to the reference clock.

source

Specifies the source of the clock constraint on internal pins of the design. If you specify a clock constraint on a pin that already has a clock, the new clock replaces the existing clock. Only one source is accepted. Wildcards are accepted as long as the resolution shows one pin.