ra8803 RAIO Technology Inc., ra8803 Datasheet - Page 6

• Manufacturer Part Number: ra8803
• Description: Two Layers Character/graphic Lcd Controller Specification
• Manufacturer: RAIO Technology Inc.

Version 2.5
3. Block Diagram
RAiO
Figure 3-1 is the internal block diagram of RA8803. The RA8803 consists of Display RAM, 512Kbyte Font
ROM, Command Registers, Analog to Digital Converter(ADC), Digital to Analog Converter(DAC), Display
Timing Generator(DTG) and Microprocessor interface. Figure 3-2 is the internal block diagram of RA8822.
The major difference of RA8803 and RA8822 is the Display RAM size. The RA8803 built-in two 9.6Kbyte
display RAM, and RA8822 built-in two 4.8Kbyte RAM. Figure 3-3 is the system block for application of
RA8803 and RA8822.
TECHNOLOGY INC.
KC[7..0]
KR[7..0]
IOUT
LPF
XA
XB
Key Scan
CIRCUIT
MCU INTERFACE CIRCUIT
DAC
5 Bit
PLL
8x8
Figure 3-1: RA8803 Block Diagram
DISPLAY DATA SRAM
REGISTER CIRCUIT
512KB
320x240x2 (Two Page)
FONT
ROM
(9.6KByte x 2)
SYSTEM CONFIGURE
6/48
CIRCUIT
Two Layers Character/Graphical LCD Controller
SRAM
FONT
512B
GENERATOR
DISPLAY
CIRCUIT
TIMING
10 Bit
ADC
RA8803/8822
www.raio.com.tw
LP
YD
DISPOFF
LD[7..0]
FRM
XCK
X1
X2
Y1
Y2