set_bus_skew Command

set_bus_skew [-help] [-from <names>] [-to <names>][-through <names>] <value>

This command sets the bus skew requirement the bus signals for the report_bus_skew command.

  • -help displays the command options.
  • -from lists path startpoints, such as register cells or register cell clock pins. Input ports are not valid startpoints.
  • -to lists path endpoints, such as register cells or register cell D pins. Output ports are not valid endpoints.
  • -through lists through pins, cells, or nets (see -through Option for supported use cases).
  • <value> specifies the constraint value.

The following example defines the bus skew between the bus signals data1_reg and datac_reg:

set_bus_skew -from [get_pins {data1_reg[*]~FF|CLK] -to [get_pins {datac_reg[*]~FF|D}] 1.000