LC75879PT datasheet(7/35 Pages) ONSEMI

Il numero della parte	LC75879PT

Spiegazioni elettronici	Duty General-Purpose LCD Display Driver

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Produttore elettronici	ONSEMI [ON Semiconductor]

Homepage	http://www.onsemi.com

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LC75879PT

No.A1687-7/35

Pin Functions

Pin No.

Function

Active

I/O

Handling

when

unused

S1/P1 to

S8/P8

S9 to S66

S68

79, 80,

1 to 6

7 to 64

69

Segment outputs for displaying the display data transferred by serial data

input. The S1/P1 to S8/P8 pins can be used as general-purpose output

ports under serial data control.

-

O

OPEN

COM1 to COM3

COM4/S67

65 to 67

68

Common driver outputs

The frame frequency is fo[Hz].

The COM4/S67 pin can be used as a segment output in 1/3 duty.

-

O

OPEN

S69/OSCI

74

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

76

77

78

Serial data transfer inputs. Must be connected to the controller.

CE: Chip enable

CL: Synchronization clock

DI: Transfer data

H

-

I

GND

INH

75

Display off control input

•INH=low(VSS)….Display forced off S1/P1 to S8/P8=low (VSS)

(These pins are forcibly set to the general-purpose output

port function and held at the VSS level.)

S9 to S66,S68=low(VSS)

COM1 to COM3=low(VSS)

COM4/S67=low(VSS)

S69/OSCI=low(VSS)

(This pin is forcibly set to the segment output port function

and held at the VSS level.)

Stops the internal oscillator. Inhibits external clock input.

Display contrast adjustment circuit stopped.

•INH=high(VDD)…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

VDD1

71

Used to apply the LCD drive 2/3 bias voltage externally.

-

I

OPEN

VDD2

72

Used to apply the LCD drive 1/3 bias voltage externally.

-

I

OPEN

VDD

70

Power supply pin. A power voltage of 4.5 to 6.3V must be applied to this pin.

-

VSS

73

Ground pin. Must be connected to ground.

-

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