LC75841PE
www.onsemi.com
7
Pin Functions
Symbol Pin No. Function Active
I/O
Handling
when
unused
S1/P1 to S4/P4
S5 to S27
1 to 4
5 to 27
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 when so set
up by the control data.
- O OPEN
COM1
COM2
36
35
Common driver outputs. The frame frequency is fo [Hz].
- O OPEN
OSC 28
Oscillator connection. An oscillator circuit is formed by connecting an external
resistor and capacitor to this pin. This pin can be used as the external clock input
pin if external clock operating mode is selected with the control data.
- I/O V
DD
CE
CL
DI
32
33
34
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
30
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 segment output port function
and held at the V
SS
level.)
S5 to S27 = low (V
SS
)
COM1, COM2 = low (V
SS
)
OSC = Z (high impedance)
RC oscillation stopped
Inhibits external clock input.
•
INH
= high (V
DD
)...Display on
RC oscillation enabled (RC 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
29 Power supply. Provide a voltage in the range 4.0 to 6.0 V. - - -
V
SS
31
Ground pin. Must be connected to ground.
- - -
