ra8835a RAIO Technology Inc., ra8835a Datasheet - Page 68

• Manufacturer Part Number: ra8835a
• Description: Dot Matrix Lcd Controller
• Manufacturer: RAIO Technology Inc.

RAiO TECHNOLOGY INC.
Version 1.0
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.
DISP ON/OFF
C = 59H
P1 = 16H
X = Don’t care
Address bus
Control bus
processor
memory
Data bus
Micro-
Main-
Figure 8-5: System Block Diagram
Character
generator
RA8835
Address
Display
control
control
Driver
68/88
Display memory
Display memory
Address bus
data bus
Y drive
X drive
Display memory
X drive
LCD panel
Generator memory
Exter character
Dot Matrix LCD Controller
Drive bus
X drive
LCD unit
RA8835A
www.raio.com.tw