Sony CDX-GT340, Service Manual

CDX-GT34W/GT340

26

•  IC Pin Function Description

MAIN  BOARD  IC501  R5F3640DDA15FA (SYSTEM CONTROL)

Pin No.

Pin Name

I/O

Description

1

LCD SO

O

Liquid crystal display panel serial data signal output

2

LCD CKO

O

Liquid crystal display panel serial clock signal output

3

NOSE SW

I

Front Panel detach/attach detect signal input    “L”: With panel

4

SIRCS

I

Remote control signal input

5

UNISO

O

SONY BUS serial data signal output

6

UNISI

I

SONY BUS serial data signal input

7

UNISCK

O

SONY BUS serial clock signal output

8

BYTE

I

Connect to ground.

9

CNVSS

I

Flash write signal input    Normally operation: “L”, Flash write: “H”

10

XIN

I

Low speed operation clock signal input (32.768kHz)

11

XOUT

O

Low speed operation clock signal output (32.768kHz)

12

RESET

I

Reset signal input

13

OSCOUT

O

High speed operation clock signal output (11.06MHz)

14

VSS

—

Ground pin

15

OSCIN

I

High speed operation clock signal input (11.06MHz)

16

VCC1

—

Power supply pin (+3.3V)

17

NMI

I

External pull up pin (

fi

 xed at “H”.)

18

EQ SEL

O

Not used. (

fi

 xed at “L”.)

19

BUIN

I

Back up power supply detection signal input

20

CDM ON

I

CD mechanism deck power supply control request signal input

21

Z MUTE

I

Mute signal input

22 to 27

NCO

O

Not used. (Open)

28

BEEP

O

Beep signal output to power ampli

fi

 er

29

I2C SCK

O

I2C serial clock signal output

30

I2C SIO

I/O

I2C serial data signal input/output

31

FW TXD

O

Flash write interface serial data signal output

32

FW RXD

I

Flash write interface serial data signal input

33

FW CLK

I

Flash write interface serial clock signal input

34

FW BUSY

O

Flash write interface serial busy signal output

35 to 40

NCO

O

Not used. (Open)

41

EPM

O

EPM signal output (Connect to ground.)

42

RC IN1

I

Rotary commander shift key signal input    Not used.

43

SYSRST

O

System reset signal output

44

BUSON

O

BUS ON signal output

45

NCO

O

Not used. (Open)

46

CE

O

CE signal output

47 to 51

NCO

O

Not used. (Open)

52

CD ON

I

CD mechanism servo power supply control request signal input

53

TESTIN

I

Test mode detection signal input    Not used.

54

TELATT

I

Telephone attenuate detection signal input    Not used.

55

ACC IN

I

Accessory power supply detection signal input

56

ATT

O

Audio mute control signal output

57

DIAG

I

Power ampli

fi

 er status signal input

58

AMPSTB

O

Standby signal output to power regulator IC

59

NCO

O

Not used. (Open)

60

NCO/BT AUDIO SEL

O

Not used. (Open)

61

NCO

O

Not used.

62

VCC2

—

Power supply pin (+3.3V)

63

COL SEL/NCO

O

Not used.

64

VSS

—

Ground pin

65

ILLUMI SEL

I

Illumination voltage setting signal input for panel

66

DEMO SEL

I

DEMO select signal input    “H”: DEMO on

67

DIM SEL

I

Dimmer function setting signal input    “L”: No dimmer

68

B OUT SEL

I

Black out setting signal input    “L”: No block out

69

AREASEL 3

I

Destination setting pin 3

70

AREASEL 2

I

Destination setting pin 2