XR-CA330, XR-CA340 - Sony Car Audio Service Manual (repair manual). Page 26

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Pin No.

Pin Name

I/O

Description

45

SDA

I/O

Not used

46

NC

—

Not used

47

SCL

O

Not used

48

VOL-SO

O

Serial data output to the electrical volume

49

VOL-CE

O

Chip enable signal output to the electrical volume    “H” active

50

VOL-CKO

O

Serial data transfer clock signal output to the electrical volume

51

AMP-ON

O

Standby on/off control signal output to the power amp    “L”: standby mode, “H”: amp on

52

AMP-MUTE

O

Muting on/off control signal output to the power amp    “L”: muting on

53

MUTE

O

Audio line muting on/off control signal output terminal    “H”: muting on

54

TU-MUTE

O

Not used

55

PORT2 (ST)

I

FM stereo broadcasting detection signal input from the FM/AM tuner unit
“H”: stereo display lighting

56

NC

—

Not used

57

LO/DX

O

Local/DX control signal output to the FM/AM tuner unit    “L”: DX

58

TU-ON

O

Tuner system power supply on/off control signal output terminal    “H”: tuner power on

59

FM-ON

O

FM system power supply on/off control signal output terminal
“L”: AM power on, “H”: FM power on    Not used

60

AM-ON

O

AM system power supply on/off control signal output terminal
“L”: FM power on, “H”: AM power on    Not used

61 to 68

NC

—

Not used

69

NOISE-ON

O

Not used

70 to 82

NC

—

Not used

83

ILL-COLOR

I

Illumination color select input terminal    “L”: amber illumination    “H”: green illumination    
(fixed at “H”)

84

DEST-SEL0

I

Destination setting terminal (fixed at “H”)

85

DEST-SEL1

I

Destination setting terminal    XR-CA330: fixed at “L”,  XR-CA340: fixed at “H”

86

DEST-SEL2

I

Destination setting terminal                                                                                                                  
XR-CA330: fixed at “L”,  XR-CA340: input for the FREQUENCY SELECT switch

87, 88

NC

—

Not used

89

NOSE-SW

I

Front panel block remove/attach detection signal input terminal
“L”: front panel is attached

90

FLASH-W

I

Internal flash memory data write mode detection signal input terminal                                              
“L”: data write mode    Normally: fixed at “H”

91

NC

—

Not used

92

ILL-ON

O

Power on/off control signal output of the illumination LED and LCD back light                               
“H”: power on

93

BUS-ON

O

Bus on/off control signal output to the bus interface    “L”: bus on

94

SYS-RST

O

Reset signal output to the bus interface    “L”: reset

95

DAVSS

—

Ground terminal (for D/A converter)

96

TAPE-ON

O

Capstan/reel motor drive signal output terminal    “H”: motor on

97

N/R

I

Tape direction switch input terminal    “L”: reverse direction    “H”: forward direction

98

FF/REW

I

FF/REW detection switch input terminal    “L”: FF/REW mode

99

TAPE-IN

I

Tape in detection switch input terminal    “L”: tape in

100

DAVDD

—

Power supply terminal (+5V) (for D/A converter)