Sony CDX-GT650UI - Fm/am Compact Disc Player, Service Manual

CDX-GT650UI/GT700UI/GT707UI

28

•  IC Pin Function Description

MAIN BOARD (2/3) IC501 R5F3650KBDZ96FA (SYSTEM CONTROL)

Pin No.

Pin Name

I/O

Description

1

LCD_SO

O

Serial data output for LCD driver

2

LCD_CLK

O

Serial clock signal output for LCD driver

3

NOSE_SW

I

Front panel detach detect signal input (L: with panel, H: without panel)

4

SIRCS

I

SIRCS signal input

5

UNISO

O

SONY BUS serial data output (Not used in this set)

6

UNISI

I

SONY BUS serial data input (Fixed at L in this set)

7

UNISCK

O

SONY BUS serial clock signal output (Fixed at L in this set)

8

BYTE

I

External data bus width select signal input (Connect to VSS in this set)

9

CNVSS

I

Flash writer IF (CNVSS) signal input (L: normally operation, H: 

fl

 ash write)

10

XIN

I

Low speed operation clock signal input (32.768 kHz)

11

XOUT

O

Low speed operation clock signal output (32.768 kHz)

12

RESET

I

System reset signal input

13

OSCOUT

O

High speed operation clock signal output (7.92 MHz)

14

VSS

—

Ground

15

OSCIN

I

High speed operation clock signal input (7.92 MHz)

16

VCC1

—

Power supply pin (+3.3 V)

17

NMI

I

Non-maskable interrupt signal input (Fixed at H in this set)

18

RC_IN1

I

Rotary commander shift key signal input

19

BUIN

I

Backup power supply detect signal input

20

SYSRST

O

System reset signal output

21

BUS_ON

O

VBUS power control signal output (Not used in this set)

22

MC_RX

I

MC-BUS communication MECHA (CMX-101Z) TX signal input

23

DOOR_SW

I

Front panel open detect signal input

24

MC_TX

O

MC-BUS communication MECHA (CMX-101Z) RX signal output

25

DOOR_ING

O

Disc slot indicator control signal output

26

SYNC_OUT

O

DD converter frequency control signal output

27

EJECT_OK

O

Eject OK signal output

28

BEEP

O

Beep signal output for the power ampli

fi

 er IC

29

I2C_SCK

O

IIC communication serial clock signal output

30

I2C_SIO

I/O

IIC communication serial data input/output

31

FW_TXD

O

Flash writer IF (serial data) output

32

FW_RXD

I

Flash writer IF (serial data) input

33

FW_CLK

I

Flash writer IF (serial clock) signal input

34

FW_BUSY

O

Flash writer IF (busy) signal output

35, 36

NCO

O

Not used. (Open)

37

CD_ON

I

CD mechanism servo power supply control request signal input

38

CDM_ON

I

CD mechanism deck power supply control request signal input

39

WAKE_UP

O

CD mechanism deck micon wake up signal output

40

Z_MUTE

I

Z mute signal input

41

EPM

O

EPM signal output (Fixed at L in this set)

42

MODELNAME_SEL0

I

Model name select signal input 0 (Fixed at L in this set)

43

MODELNAME_SEL1

I

Model name select signal input 1 (Fixed at L in this set)

44

MODELNAME_SEL2

I

Model name select signal input 2

45

MODELNAME_SEL3

I

Model name select signal input 3

46

CE

O

CE signal output (Fixed at H in this set)

47

NCO

O

Not used. (Open)

48

SA_DATAIN

I

Paradisso spectrum analyzer serial data input

49

SA_CLKOUT

O

Paradisso spectrum analyzer serial clock signal output

50

USBON

O

USB over current detect IC control signal output

51

VBUS_ON

I

VBUS power supply control signal input (L: VBUS OFF, H: VBUS ON)

52

USB_OVR

I

USB over current detect signal input

53

EXTATT_XEN

O

L is sent when electronic volume IC has the status of CD/USB (H is sent when it has the 
status of other source) (Not used in this set)

54

NCO

O

Not used. (Open)

55

F_AUX_ATT

O

Front AUX mute detect signal input (H: Front AUX input)

56

TELATT

I

Telephone attenuator detect signal input

57

ACC_IN

I

Accessory power supply detect signal input