An image processing circuit for processing graphics image data, a semiconductor integrated circuit device including the image processing circuit, an image processing system including the semiconductor integrated circuit device, and a method of testing the semiconductor integrated circuit device

摘要

The frame buffer memory 10 of the present invention includes a DRAM main memory 11, a SRAM cache memory 12 and a transfer bus 17 for transferring 256-bit data between the main memory and the cache memory, for example. A pixel processing unit 13 for performing predetermined arithmetic processing according to data provided from the cache memory and externally supplied data, and a data processing unit 13 for comparing data provided from the cache memory with externally supplied data , A transfer bus (19) for transferring result data from the pixel processing unit to the cache memory, and a transfer unit for storing data read from the main memory and supplying the stored data to the outside And a serial access memory 15.;According to this configuration, a-blending processing, raster operation, Z-comparison processing, and the like required for graphics can be performed at high speed and at a high speed.