¡ Semiconductor
MSM6660-01,02,03
• 2/3 (pin 70)
This pin is used to switch between 1/2 and 1/3 duty.
Set this pin to "H" to select 1/2 duty, and to "L" to select 1/3 duty.
• COMOUT (pin 63)
This is an output pin for clock synchronization. A frequency equal to f
OSC
/4 is output from
this pin.
• V
LC1
(pin 74), V
LC2
(pin 75) and V
LC3
(pin 76)
When the code is -01, these pins are used as input pins for LCD bias voltage. The V
LC3
pin
should be connected with GND. The settings for these pins should be as follows:
V
DD
≥
V
LC1
≥
V
LC2
≥
V
LC3
= GND
When the code is -02 or -03, V
LC1
and V
LC2
pins should be left open, and V
LC3
pin connected
with GND since a voltage-dividing resistor for bias voltage generation has been built in.
(However, when the code setting is -02 or -03, and if 1/2 duty is selected, V
LC1
and V
LC2
should be externally shorted.)
• COM1-COM3 (pins 78 to 80)
These are common signal output pins for driving the LCD. In the 1/2 duty mode, leave the
COM3 pin open.
• SEG0-SEG61 (pins 1 to 62)
These are segment signal output pins for driving the LCD. 1/2 or 1/3 duty can be selected
using the 2/3 pin, and 1/2 or 1/3 bias can be selected using pins V
LC1
through V
LC3
.
•
LT
(pin 71)
This is an input pin for controlling the display on the LCD. If this pin is set to "L", all segments
will be turned on. A pull-up resistor is included.
•
BL
(pin 72)
This is an input pin for controlling the display on the LCD. If this pin is set to "L", all segments
will be turned off. A pull-up resistor is included.
8/18
OKI [ OKI ELECTRONIC COMPONETS ]
