
MB86290A
10
s
s FUNCTION BLOCKS
Host Interface
This block allows the MB86290A to be connected to the SH3 or SH4 microprocessor manufactured by Hitachi
Ltd. without any external circuit in between. The block provides an interface to transfer display list and texture
pattern data directly from main memory to the CREMSON graphics memory or internal register using the external
DMA controller.
External Memory Controller
This block controls the external synchronous DRAM connected as graphics memory. The 64-bit or 32-bit data
bus is selected and the maximum operating frequency is 100 MHz.
Display Controller
This block contains a three-channel D/A converter supporting XGA (1024x768 pixels) display and outputs analog
RGB signals. The block enables superimposing using the external synchronization mode. It can divide the
screen into the left and right parts to display different contents and to scroll them separately. It can also display
animations smoothly using double buffering. In addition, it can overlay up to four screens, where the image color
blending function can be used to display maps through the console screen as a transparency.
2D/3D Rendering Engine
This block draws images in two or three dimensions.
2D drawing
The block provides the anti-aliasing and alpha blending functions to display high-quality images even on a low-
resolution LCD.
3D drawing
The block provides true 3D drawing functions such as perspective texture mapping and Gouraud shading.