RA0086A
Version 1.1
80CH Common / Segment Driver For DOT Matrix LCD
4-2 Pin Description
Pin
VDD
VSS
VEE
V0, V12,
V43, V5
I
P
Power
supply
I/O
Name
Description Function
Logical "High" input port (+5V
±
10%, +3V
±
10%)
0V (GND)
Logical "Low" for high voltage part
LCD driver Bias supply voltage input to drive the LCD. Bias voltage
output
divided by the resistance is usually used as a supply
voltage
voltage source.
level
Display data output pin which corresponds to the
LCD driver respective latch contents. One of V0, V12, V34 and V5 is
selected as a display driving voltage source according to
output
the combination of the latched data level and M signal.
Clock pulse input for the bi-directional shift register.
– In segment driver application mode, the data is shifted to
20 x 4-bit segment data shift.
Data shift The clock pulse, which was input when the enable bit
(ELB/ERB) is in not active condition, is invalid.
clock
– In common driver application mode, the data is shifted to
80-bit common data bi-directional shift register by the CL1
clock.Hence, this clock pin is not used (Open or connect
this pin to VDD).
AC signal
for LCD
Alternate signal input pin for LCD driving.
driver
Normal frame inversion signal is input in to this pin.
output
– In segment driver application mode, this signal is used
for latching the shift register contents at the falling edge of
Data latch this clock pulse. CL1 pulse "High" level initializes power-
down function block.
clock
– In common driver application mode, CL1 is used as a
shifting clock of common output data.
Control input pin to fix the driver output (SC1~SC80) to V0
Display OFF level,during "Low" value input. LCD becomes non-selected
by V0 level output from every output of segment drivers and
control
every output of common drivers.
COM / SEG When CS = "Low", RA0086A is used as an 80-bit segment
driver.
mode
When CS = "High", RA0086A is set to an 80-bit common
control
driver
According to the input value of the AMS and the CS pin,
application mode of RA0086A is differs as shown below.
CS
AMS
I
Application
mode select
0
0
1
1
AMS
0
1
0
1
Application mode
4-bit parallel interface mode.
1-bit serial interface mode.
Single type application mode
Dual type application mode
COM
/SEG
SEG
COM
VDD/ VSS
Power
Interface
Power
SC1 -
SC80
O
LCD
CL2
I
Controller
M
I
Controller
CL1
I
Controller
DISPOFFB
I
Controller
CS
I
VDD/ VSS
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TECHNOLOGY INC.
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www.raio.com.tw
RAIO [ RAIO TECHNOLOGY INC. ]
