Sharp ER-A750 Service Manual page 57

4. LCD display
The main display is a 320 240 dot liquid crystal display. The
display controller is capable of performing cycle steal actions (dis-cussed
later), thus achieving high-speed display.
4-2. LCD panel
The LCD panel is the model LM320153 dot-matrix liquid crystal unit,
which is a blue-mode transmission type with a CCFT back light.
The resolution is 320 240 dots, with each dot size being 0.33
0.33.
4-3. Display controller
The display controller is the Epson SED1351F0A. VRAM is located on
the address space of the CPU and it is possible to write and read
data freely to and from the CPU. Access to VRAM is performed in the
cycle steal method, so that data can be written and read without
disturbing the display screen while the screen is scanned. (While the
screen is scanned, access to VRAM is inhibited; Instead, VRAM is
generally accessed at the fly-back time.)
VRAM uses 32 KB of SRAM.
7-27