RA8835A
Version 1.0
Dot Matrix LCD Controller
DISP ON/OFF
C = 59H
P1 = 16H
X = Don’t care
8-2 System Overview
Figure 8-5 shows the RA8835A series in a typical system. The microprocessor issues instructions to
the RA8835A series, and the RA8835A series drives the LCD panel and may have up to 64KB of
display memory. Since all of the LCD control circuits are integrated onto the RA8835A series, few
external components are required to construct a complete medium- resolution liquid crystal display.
RA8835
Display memory
Exter character
Generator memory
Address bus
Character
generator
Display memory
Display
Address
control
Micro-
processor
Display memory
data bus
Driver
control
LCD unit
Drive bus
Main-
memory
X drive
X drive
X drive
Y drive
LCD panel
Data bus
Address bus
Control bus
Figure 8-5: System Block Diagram
RAiO TECHNOLOGY INC.
www.raio.com.tw
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RAIO [ RAIO TECHNOLOGY INC. ]
