4.1 Constraints: Block-Level Design Constraints

In projects with encrypted IP, unimplemented components, or simply missing libraries, it is necessary to add block-level design constraints to ensure proper linting of your design. Constraints can be applied to those black box components where internal logic is unreachable and provides the tool with the much-needed information on how that module operates. This behavior is passed by setting cell and pin types, or simply using one of the built-in lib function for common components.