An internal buffer is provided for a DRP core. A selector SEL switches input/output destination of the DRP core between external memory and an internal buffer. Control software executed by a CPU core receives information a pipeline of configurations for a sequence of target processing and generates combinations as to whether the processing result is transferred between the configurations via the external memory or via the internal buffer as transfer manners. Next, for each manner, bandwidth and performance of the external memory used by the DRP core in the manner are calculated. The manner of the best performance satisfying a previously specified bandwidth restriction is selected among the manners and the selector SEL is switched in accordance with the manner.