Memory consolidated image processing LSI, image processing system with same, and image accessing method using same

摘要

In a memory consolidated image processing LSI for reading data, a DRAM for storing image data for a plurality of page ranges which are formed by segmenting an image plane corresponding to a display screen in order to page-access a memory region of the DRAM, and image data for a plurality of word ranges which are formed by segmenting each of the page ranges in order to word-access the memory region, is consolidated with an image processing circuit. The size of each of the page ranges is set so that the multiplied value of the power consumption per pre-charge in a power consumption model of a memory by an average number of pre-charges is the substantially minimum value, and the size of each of the word ranges is set so that the multiplied value of the power consumption per word access in the power consumption model of the memory by an average number of word accesses is the substantially minimum value. Thus, it is possible to reduce the power consumption when a page access and a word access are carried out, so that the memory consolidated image processing LSI can be mounted on a portable image processing system.