RA8803 データシートの表示（PDF） - RAIO
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RA8803 Datasheet PDF : 8 Pages
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Version 2.1
RA8803/8822
Two Layers Character/Graphical LCD Controller
3. Block Diagram
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 different 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.
KR[7..0]
KC[7..0]
IOUT
LPF
XA
XB
8x8
Key Scan
5 Bit
DAC
320x240x2 (Two Page)
DISPLAY DATA SRAM
(9.6KByte x 2)
REGISTER CIRCUIT
DISPLAY
TIMING
GENERATOR
CIRCUIT
PLL
CIRCUIT
512KB
FONT
ROM
512B
FONT
SRAM
MCU INTERFACE CIRCUIT
SYSTEM CONFIGURE
CIRCUIT
10 Bit
ADC
LP
FRM
YD
DISPOFF
XCK
LD[7..0]
X1
X2
Y1
Y2
Figure 3-1: RA8803 Block Diagram
RAiO TECHNOLOGY INC.
3/8
www.raio.com.tw
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