JVC KS-FX725R service manual LC75823E IC651 LCD Driver, Pin Layout & Symbol

KS-FX725R

LC75823E (IC651) : LCD Driver

1. Pin Layout & Symbol

OSC

VDD2

VDD1

VDD

COM3

COM2

COM1

DI

CL

CE

Vss

INH

S52

S51

S50

S49

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

S1

1

48

S48

S2

2

47

S47

S3

3

46

S46

S4

4

45

S45

S5

5

44

S44

S6

6

43

S43

S7

7

42

S42

S8

8

41

S41

S9

9

40

S40

S10

10

39

S39

S11

11

38

S38

S12

12

37

S37

S13

13

36

S36

S14

14

35

S35

S15

15

34

S34

S16

16

33

S33

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

S17

S18

S19

S20

S21

S22

S23

S24

S25

S26

S27

S28

S29

S30

S31

S32

2. Pin Function

Pin No.

Symbol

I/O

Function

1 to 52

S1 to S52

O

Segment output pins used to display data transferred

by serial data input.

53 to 55

COM1 to COM3

O

Common driver output pins. The frame frequency is given

by : t0=(fosc/384)Hz.

56

VDD

--

Power supply connection. Provide a voltage of between

4.5 and 6.0V.

57

I

Display turning off input pin.

INH

INT

="L" (Vss) ----- off (S1 to S52, COM1 to COM3="L"

INT="H" (VDD)----- on

Serial data can be transferred in display off mode.

58

VDDD1

I

Used for applying the LCD drive 2/3 bias voltage

externally.

Must be connected to VDD2 when a 1/2 bias drive scheme

is used.

59

VDD2

I

Used for applying the LCD drive 1/3 bias voltage

externally.

Must be connected to VDD1 when a 1/2 bias drive scheme

is used.

60

Vss

--

Power supply connection. Connect to GND.

61

OSC

I/O

Oscillator connection.

An oscillator circuit is formed by connecting an external

resistor and capacitor at this pin.

62

CE

Serial data

CE : Chip enable

interface connection

63

CL

I

to the controller.

CL : Sync clock

64

DI

DI : Transfer data

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