LC75890W
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8
Continued from preceding page.
Symbol Pin No. Function Active
I/O
Handling
when
unused
INH
45
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 S36=low (V
SS
)
COM1 to COM4=low (V
SS
)
S37/OSCI=low (V
SS
)
(This pin is forcibly set to the segment output port function
and held at the V
SS
level.)
LCD drive bias voltage stabilization circuit stopped.
Stops the internal oscillator.
Inhibits external clock input.
•
INH
= high (V
DD
) ...Display on
LCD drive bias voltage stabilization circuit is enabled.
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
42
Logic block power supply pin. A power voltage of 2.7 to 3.6 V
must be applied to this pin.
- - -
V
LCD
43
LCD driver block power supply pin. A power voltage of 2.7 to
5.5 V must be applied to this pin.
- - -
V
SS
44 Ground pin. Must be connected to ground. - - -
