FEDL6665C-02
¡ Semiconductor
MSM6665C-xx
• TEST1, TEST2, TEST3
Test signal input pins.
The manufacturer uses these pins for testing.
The user should make these pins short-circuited to GND or open.
• OSC1, OSC2, OSC3
Pins used for 80kHz RC oscillation circuit formation and as external master clock input
pin. OSC2 and OSC3 are open during input of external master clock. See diagram below.
OSC1
10k
W
62±5kW
OSC1
80kHz
OSC2
OSC2
OPEN
OSC3
OPEN
OSC3
56pF
[RC oscillation circuit formation]
[External master clock input]
< Oscillation circuit wiring diagram >
• C1 to C17, S1 to S80 (Common 1 - 17, Segment 1 - 80)
LCD output pins to be connected with the LCD panel. Turning into AC is made by frame
inversion. During use at 1/9duty, C1 to C9 pins are used, and C10 to C17 pins are set
open. See figure below.
Arbitrator
C1
C2
Cursor
C8
C9
C10
Cursor
C16
C17
S1
S80
<Relationship between panel and LCD output>
• V
DD
, V
SS
Supply voltage pins. V
DD
should be set at "H" level.
V
SS
is a GND pin. If the battery is used, V
DD
is connected to the + pin, and V
SS
to the
– pin.
9/31
OKI [ OKI ELECTRONIC COMPONETS ]
