LC75864W datasheet(7/26 Pages) SANYO

Il numero della parte	LC75864W

Spiegazioni elettronici	1/4 Duty LCD Display Drivers with Key Input Function

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Produttore elettronici	SANYO [Sanyo Semicon Device]

Homepage	https://www.sanyo-av.com/us/

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Pin Functions

No. 6860-7/26

LC75864E, 75864W

Pin No.

Function

Active

I/O

Handling

when unused

S1/P1 to S4/P4

S5 to S22

COM1

COM2

COM3

COM4

KS1/S23

KS2/S24

KS3 to KS6

KI1 to KI5

OSC

CE

CL

DI

DO

TEST

VLCD1

VLCD2

VDD

VLCD

1 to 4

5 to 22

23

24

25

26

27

28

29 to 32

33 to 37

44

46

47

48

45

43

40

41

38

39

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.

Common driver outputs

The frame frequency fO is given by: fO = (fOSC/512) Hz.

Key scan outputs

Although normal key scan timing lines require diodes to be inserted in the

timing lines to prevent shorts, since these outputs are unbalanced CMOS

transistor outputs, these outputs will not be damaged by shorting when

these outputs are used to form a key matrix. The KS1/S23 and KS2/S24

pins can be used as segment outputs when so specified by the control data.

Key scan inputs

These pins have built-in pull-down resistors.

Oscillator connection

An oscillator circuit is formed by connecting an external resistor and

capacitor at this pin.

Serial data interface connections to the controller. Note that DO, being an

open-drain output, requires a pull-up resistor.

CE: Chip enable

CL: Synchronization clock

DI: Transfer data

DO: Output data

This pin must be connected to ground.

Used for applying the LCD drive 2/3 bias voltage externally. Must be

connected to VLCD2 when a 1/2 bias drive scheme is used.

Used for applying the LCD drive 1/3 bias voltage externally. Must be

connected to VLCD1 when a 1/2 bias drive scheme is used.

Logic block power supply connection. Provide a voltage of between 4.5 and

6.0 V.

LCD driver block power supply connection. Provide a voltage of between

VDD – 0.5 and 6.0 V.

—

H

—

H

—

O

I

I/O

I

O

I

—

Open

GND

VDD

GND

Open

—

Open

—

VSS

42

Power supply connection. Connect to ground.

—

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