PURPOSE:To To offer the design support environment conforming to the IC age for special use by separating and constituting a micromodel of a function level and a micromodel of a circuit level in advance, and controlling the calculation time and the calculation accuracy by using a continuous system simulation language. CONSTITUTION:A DSP system designer expresses a function whose realization is desired by a block diagram. Subsequently, with regard to an A-D/D-A converting part and a DSP part, the following selection is executed. In the case of the A-D/D-A part, an A-D/D-A element is described by using an A-D/D-A library 105, and in the case of the DSP system, a DSP element is described by using a DSP library 107. As for these descriptions, a continuous system simulation language is used. Next, a variable is unified and a coupling description is executed. Thereafter, by selecting automatically an integral method of DDSL, a simulation is executed on a computer. As a result, success or failure is decided by the DSP system designer.
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