esTc 设计中 Component Declaration and Instantiation component Declaration -Used to declare the port types and the Data Types of the ports for a lower-level design. COMPONENT <lower-level_design_name> PORT( <port name>: sport type> <data type> ); END COMPONENT Component Instantiation -Used to map the ports of a lowerlevel design to that of the current-level design <instance_name>: <lower-level_design_name> PORT MAP(lower-level port name>=> <current_ level_portname>,.)设计中心 Component Declaration and Instantiation • Component Declaration - Used to declare the Port types and the Data Types of the ports for a lower-level design. COMPONENT <lower-level_design_name> PORT ( <port_name> : <port_type> <data_type>; ……); END COMPONENT; • Component Instantiation - Used to map the ports of a lowerlevel design to that of the current-level design <instance_name> : <lower-level_design_name> PORT MAP(<lower-level_port_name> => <current_level_port_name>, …);