The final step in the system architectural design phase is the definition of the hardware attributes of the logical ECU interfaces, i.e. which information will be hardwired and which will be provided via data bus. This top-down design process can be achieved in two ways:
● By modeling the respective ECU as described in Generic Top-Level SUD Structure (refer to the Functional ECU Model with H/W Interfaces for Rapid Prototyping in Rational Statemate figure), thus enabling a validation though Rapid Prototyping.Principally, both approaches allow a seamless transition to the software design by means of the tool MicroC. Which of the outlined approaches is appropriate depends on the system design validation criteria in the OEM / Supplier environment. Either the OEM engineer wants to validate the hardware design. In this case the engineer uses the Rational Statemate Rapid Prototyping feature or transfers the hardware design validation to the supplier. In this case, Rapid Prototyping is performed directly on the target by means of the MicroC tool based on the logical interface variable attributes.