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In embedded systems, programmable peripherals are often coupled with the main programmable processor to achieve the desired functionality. Interfacing such peripherals with the processor quali es as an important task of hardware software c o design. In this paper, three important aspects of such interfacing, namely, the allocation of addresses to the devices, allocation of device drivers, and approaches to handle events and transitions have been discussed. The proposed approaches have been incorporated i n a c o design system MICKEY. The paper includes a number of examples, taken from results synthesized b y MICKEY, to illustrate the ideas.

In CAD systems, it is often required to implement desired behaviors by some available device. The selection of the device that can implement the behavior, and the required interfacing, is usually done by human experts. The interface consists of transformations that may have to be performed on the inputs and outputs of the device. This paper describes an approach to automatically derive the specifications of the device's interface. For sequential circuits, the behaviors are often represented as FSM's, and hence the task is to determine whether the FSM of the desired function can be contained in the FSM of the device, subject to the transformations of the interface. A related objective, addressed in this paper, is to model the behaviors of complex devices in a way that facilitates the analysis.Zndex Terms-Behavioral mapping, rapid prototyping, device modeling.