RA8816N
Preliminary Version 1.0
144x65 Character/Graphic LCD Driver
3. Block Diagram
MPU
LCD Panel
RA8816N
GPIO
4x5
Key Scan
Figure 3-1 : System Block
The RA8816N is consisted of Display RAM, 256KB Font ROM, Command Registers, LCD Controller,
LCD Driver, Voltage Booster, Voltage Regulator, MPU Interface and Key-Scan circuit.
DB[7:0]
RD(EN)
WR(R/W)
CS
D/C(RS)
C86
BIT4
P/S
MPU
I/F
Block
1170+450bytes
Display RAM + Buffer
256bytes
CGRAM
256Kx8 Font ROM
LCDC Control Block
Register
KST[3:0]
KIN[4:0]
INT
Key Scan
Control
Block
& INT
Block
Cursor
Control
Scroll
Control
Scan
Control
Driver I/F
IO[7:0]
GPIO
CLK_SEL
EXT_CLK
RC
Oscillator
Voltage
Regulator
Voltage
Booster
Voltage
Follower
VR
VREF
RST
TEST[2:0]
TP[6:0]
Test &
Power
Circuit
144
Segment
Drivers
65
Common
Drivers
C[3:1]P C[2:1]M V0~V4 VOUT
SEG0~SEG143 COM0~COM63
COMS_A
COMS_B
Figure 3-2 : Internal Block
RAiO TECHNOLOGY INC.
3/8
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RAIO [ RAIO TECHNOLOGY INC. ]
