IMAGE PROCESSOR AND DATA PROCESSING SYSTEM USING THE SAME

摘要

PURPOSE: To perform the working and plotting processing of image data at high speed and to enable read and display processing at low cost by directly connecting a local memory for temporarily storing a command or source image data to a graphics processor. CONSTITUTION: A CPU 101 prepares the list of instructions to a graphics processor 1 while using a main memory 102 and transfers the command and input data to be processed through a data control part 11 to a synchronous DRAM 13 while using a system controller 2. Then, a bus control part 16 is installed with a bus switch 162 for switching a data path for transferring the command or source image data from the CPU 101 to the DRAM 3 and a data path for plotting the data in a frame buffer 104 while reading them from this DRAM 3. Since such a DRAM 3 is provided, the peak throughput can be provided by pipeline processing for processing the command or source image data while reading them and for writing the plotting data.