13.33.143 set_multicycle_path

Defines a path that takes multiple clock cycles in the current scenario.

set_multicycle_path ncycles [-setup] [-hold] [-from from_list[–through through_list[-to to_list

Arguments

ncycles

Specifies an integer value that represents a number of cycles the data path must have for setup or hold check. The value is relative to the starting point or ending point clock, before data is required at the ending point.

-setup

Optional. Applies the cycle value for the setup check only. This option does not affect the hold check. The default hold check will be applied unless you have specified another set_multicycle_path command for the hold value.

-hold

Optional. Applies the cycle value for the hold check only. This option does not affect the setup check.

Note: If you do not specify "-setup" or "-hold", the cycle value is applied to the setup check and the default hold check is performed (ncycles -1).

-from from_list

Specifies a list of timing path starting points. A valid timing starting point is a clock, a primary input, an inout port, or a clock pin of a sequential cell.

-through through_list

Specifies a list of pins or ports through which the multiple cycle paths must pass.

-to to_list

Specifies a list of timing path ending points. A valid timing ending point is a clock, a primary output, an inout port, or a data pin of a sequential cell.