LC75843UGA Datasheet, PDF (7/35 Pages) ON Semiconductor – Duty General-Purpose LCD Driver

LC75843UGA
Pin Functions
Symbol
Pin No.
Function
Handling
Active I/O
when unused
S1/P1 to S4/P4
1 to 4 Segment outputs for displaying the display data transferred by serial data
S5 to S24
5 to 24 input. The S1/P1 to S4/P4 pins can be used as general-purpose output ports
-
O
OPEN
S28
29
under serial data control.
COM1
28
Common driver outputs
COM2/S27
COM3/S26
27
The frame frequency is fo[Hz].
-
O
26
The COM2/S27 to COM4/S25 pin can be used as a segment output by control
OPEN
COM4/S25
25
data.
This is input pin for the external clock.
OSCI
32
Input the clock at external clock operating mode.
-
I
GND
Furthermore, connect to GND at internal oscillator operating mode.
CE
34
Serial data transfer inputs. Must be connected to the controller.
CE : Chip enable
CL
35
CL : Synchronization clock
DI
36
DI : Transfer data
H
I
I
-
I
GND
Display off control input
•INH=low(VSS)….Display forced off
S1/P1 to S4/P4=low (VSS)
(These pins are forcibly set to the general-purpose output
INH
33
port function and held at the VSS level.)
S5 to S24, S28=low(VSS)
COM1=low(VSS)
COM2/S27 to COM4/S25=low(VSS)
Stops the internal oscillator.
L
I
GND
Inhibits external clock input.
•INH=high(VDD)…Display on
Enables the internal oscillator circuit.
(Internal oscillator operating mode)
Enables external clock input.
(External clock operating mode)
VDD
VSS
However, serial data transfer is possible when the display is forced off.
30
Power supply pin. A power voltage of 4.5 to 6.3V must be applied to this pin.
-
-
-
31
Ground pin. Must be connected to ground.
-
-
-
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