INTERFACE METHOD OF DIGITAL SIGNAL PROCESSOR

摘要

PURPOSE: An interface method of a digital signal processor is provided to increase the efficiency of an interface by interfacing an external memory device with a DMA method when the digital signal processor is booted. CONSTITUTION: A central processing unit(11) downloads a booting program from an external memory device(13). A digital signal processor(12) is booted using the booting program of the external memory device(13). Each data is written to the external memory device(13) in case that data which the central processing unit(11) will transmit to the digital signal processor(12) or data which the digital signal processor(12) will transmit to the central processing unit(11) are generated. An interrupt signal is generated that the central processing unit(11) or the digital signal processor(12) directly writes each data to the digital signal processor(12) or the central processing unit(11). The central processing unit(11) or the digital signal processor(12) directly approaches the external processing unit and reads the data.