Displays and Controller Boards
9
Document no. M1137272-02
Description of functional blocks
Processor
The graphics processor on B-DISPX is 486 based embedded processor. It uses 133MHz clock
frequency.
System memory
System Memory is a SDRAM memory. The display board software and fonts are loaded to this
memory during the operation of the display controller board. SDRAM serves also as a
temporary storage for image data.
The processor reads SDRAM by 66MHz clock frequency.
Flash
Flash memory is written to the SDRAM memory.
If the display controller software in the Flash memory is of an older version than the
corresponding part in the monitor software, or if the Flash memory is empty, the display
controller software is written from the main CPU to the display controller Flash memory during
start-up.
Display controller
The actual image to be displayed is formed in the Display controller memory according to the
data sent by the main CPU. The display controller then sends the image to the display(s) both in
analog and in digital (DVI) form.
DAC
The two outputs through this digital-analog converter are for future use.
FPGA
FPGA is used for interfacing the image data packages from the main CPU to the display
controller processor (through SDRAM) and further to the Display controller part image memory.
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