Ryan R
03/02/2022, 7:44 AMVijayan Krishnan
03/02/2022, 7:50 AMRyan R
03/02/2022, 7:51 AMArman Avetisyan
03/02/2022, 7:54 AMRyan R
03/02/2022, 12:18 PMArman Avetisyan
03/02/2022, 1:01 PMRyan R
03/02/2022, 1:36 PMkeep
attribute on cells and wires is used to mark objects that should never be removed by the optimizer. This is used for example for cells that have hidden connections that are not part of the netlist, such as IO pads. Setting the keep
attribute on a module has the same effect as setting it on all instances of the module.
• The keep_hierarchy
attribute on cells and modules keeps the flatten
command from flattening the indicated cells and modules.