RA8808
Preliminary Version 1.0
128x64Driver for Dot Matrix LCD
1. General Description
The RA8808 is a LCD driver LSI with 128(Segment) x 64(Common) driver output for dot matrix liquid crystal
graphic display systems. This device consists of the display RAM,128-bit segment drivers, 64-bit common
drivers and decoder logic. It has the internal display RAM for storing the display data transferred from an 8-
bit 8080/6800 micro controller or 3-wire-SPI/IIC controller and generates the dot matrix liquid crystal driving
signals corresponding to stored data.
2. Features
Dot matrix LCD segment driver with 128
channel output, and common driver with 64
channel output.
Internal timing generator circuit for dynamic
display.
Selection of master/slave mode for combine
two RA8808 controller to support 256x64 dot
Matrix.
Applicable LCD common duty: 1/48, 1/64.
Support 6800/8080 8-bit parallel MPU interface.
Support 3-wires SPI and IIC serial MPU
interface.
Two 512 bytes (4096-bits) Display RAM
LCD driving voltage: 8V ~17V
Built-in 2X~4X Voltage Booster and Voltage
Follower
Power supply voltage: +2.7V ~ 5.5V
High voltage CMOS process
Bare gold bump chip available
3. Block Diagram
M CL FRM
DB7~0
RS
E
RW
CS1
CS2B
CS3
CS4B
PS
MODE
MS
DS
SHL
ADC
RSTB
RA
RB
Register
Block
Scan
Block
SEG
Drivers
SEG127~0
MPUIF
Block
512x8
Display RAM
A
512x8
Display RAM
B
Power Circuit &
Test
RC
Oscillator
COM
Drivers
COM63~0
CLK_OUT TEST[2~0]
VOUT
C[2:1]N
V[4:0]
V[4:0]A
C[3:1]P
RAiO
TECHNOLOGY INC.
2/7
www.raio.com.tw
RAIO [ RAIO TECHNOLOGY INC. ]
