LC75829PE, LC75829PW
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8
Pin Functions
Symbol Pin No. Function Active
I/O
Handling
when
unused
S1/P1 to S4/P4
S5 to S50
S52
1 to 4
5 to 50
55
Segment outputs for displaying the display data transferred by serial data input.
The S1/P1 to S4/P4 pins can be used as general-purpose output ports under serial
data control.
- O OPEN
COM1 to COM3
COM4/S51
54 to 52
51
Common driver outputs
The frame frequency is fo[Hz].
The COM4/S51 pin can be used as a segment output in 1/3 duty.
- O OPEN
S53/OSCI 60
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 62
Serial data transfer inputs. Must be connected to the controller.
CE: Chip enable
CL: Synchronization clock
DI: Transfer data
H I
CL 63
I GND
DI 64 - I
INH
61
Display off control input
•
INH
= low (V
SS
) ...Display forced off
S1/P1 to S4/P4 = low (V
SS
)
(These pins are forcibly set to the general-purpose output port
function and held at the V
SS
level.)
S9 to S50, S52=low (V
SS
)
COM1 to COM3=low (V
SS
)
COM4/S51=low (V
SS
)
S53/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.
•
INH
= high (V
DD
)...Display on
Enables the internal oscillator circuit.
(Internal oscillator operating mode)
Enables external clock input.
(External clock operating mode)
However, serial data transfer is possible when the display is forced off.
L I GND
V
DD
1 57
Used to apply the LCD drive 2/3 bias voltage externally.
- I OPEN
V
DD
2 58
Used to apply the LCD drive 1/3 bias voltage externally.
- I OPEN
V
DD
56
Power supply pin. A power voltage of 4.5 to 6.0V must be applied to this pin.
- - -
V
SS
59
Ground pin. Must be connected to ground.
- - -
