LC75809PT
www.onsemi.com
7
Pin Functions
Pin Pin No. Function Active I/O
Handling
when
unused
S1/P1 to
S12/P12
S13 to S86
S88
1 to 12
13 to 86
91
Segment outputs for displaying the display data transferred by serial data
input. The S1/P1 to S12/P12 pins can be used as general-purpose output
ports under serial data control.
- O OPEN
COM1 to COM3
COM4/S87
90 to 88
87
Common driver outputs
The frame frequency is fo[Hz].
The COM4/S87 pin can be used as a segment output in 1/3 duty.
- O OPEN
S89/OSCI 96
Segment output. This pin can also be used as the external clock input pin
when the external clock operating mode is selected by control data.
- I/O OPEN
CE
CL
DI
98
99
100
Serial data transfer inputs. Must be connected to the controller.
CE : Chip enable
CL : Synchronization clock
DI : Transfer data
H
-
I
I
I
GND
INH
97
Display off control input
•
INH
=low(V
SS
)….Display forced off S1/P1 to S12/P12=low (V
SS
)
(These pins are forcibly set to the general-purpose output
port function and held at the V
SS
level.)
S13 to S86, S88=low(V
SS
)
COM1 to COM3=low(V
SS
)
COM4/S87=low(V
SS
)
S89/OSCI=low(V
SS
)
(This pin is forcibly set to the segment output port function
and held at the V
SS
level.)
Stops the internal oscillator. Inhibits external clock input.
Display contrast adjustment circuit stopped.
•
INH
=high(V
DD
)…Display on
Enables the internal oscillator circuit.
(Internal oscillator operating mode)
Enables external clock input.
(External clock operating mode)
Display contrast adjustment circuit operation is enabled.
However, serial data transfer is possible when the display is forced off.
L I GND
V
DD
1 93 Used to apply the LCD drive 2/3 bias voltage externally. - I OPEN
V
DD
2 94 Used to apply the LCD drive 1/3 bias voltage externally. - I OPEN
V
DD
92 Power supply pin. A power voltage of 4.5 to 6.3V must be applied to this pin. - - -
V
SS
95 Ground pin. Must be connected to ground. - - -
