MEX-BT5100 - Sony Car Audio Service Manual (repair manual). Page 58

61

DOOR_IND

O

LED drive signal output terminal for sub panel LED    "H": LED on

62

IT_POW

O

Power on/off control signal output terminal for the bluetooth section

63

IT_FSW_SFT

O

DC/DC converter oscillation frequency shift control signal output terminal for bluetooth sec-
tion

64

FSW_SFT

O

DC/DC converter oscillation frequency shift control signal output terminal for fl uorescent 
indicator tube section

65

NC

-

Not used

66

FLASH_W

I

Flash writing mode detection signal input terminal    Not used

67

RAMBU

I

Internal RAM reset detection signal input from the reset signal generator Input terminal to 
check that RAM data are not destroyed due to low voltage    "L": Writing mode 

68

DOOR_SW

I

Shutter of front panel open/close detection input terminal    "H": Open, "L": Close

69

NC

-

Not used

70

ACC_IN

I

Accessory power detection signal input terminal    "L": accessory power on

71  to 73

NC

-

Not used

74

AD_ON

O

A/D converter power control signal output When the KEY ACK (pin 50) that controls refer-
ence voltage power for key A/D conversion input is active, "L" is output from this terminal to 
enable the input

75

RESET

I

System reset signal input from the reset signal generator and reset switch    "L": reset

76

RST_PROTECT

O

Reset protect control signal output terminal    Not used

77

XIN

I

Sub system clock input terminal (32.768 kHz)

78

XOUT

O

Sub system clock output terminal (32.768 kHz)

79

VSS1

-

Ground terminal

80

OSCOUT

O

Main system clock output terminal (18.432 MHz)

81

OSCIN

I

Main system clock input terminal (18.432 MHz)

82

VCC3

-

Power supply terminal (+3.3V)

83

TELLATT

I

Telephone muting detection signal input terminal At input of "H", the audio signal is attenu-
ated by 20 dB

84

ILLIN

I

Illuminate line detect signal input terminal for the automatic dimmer control "L": detected the 
illumination line (lighting is made dark)

85

BUSON

O

SONY bus on/off control signal output terminal    "L": bus on

86

NC

-

Not used

87

FL_ON

O

Power on/off control signal output terminal for the fl uorescent indicator tube section

88

FLD_ON

O

Power on/off control signal output terminal for the fl uorescent indicator tube driver section

89

RC_IN1

I

Rotary remote commander shift key input terminal

90

PARKING

I

Side brake (parking brake) detection input terminal    Not used

91

EJECT_OK

O

CD eject OK signal output to the CD system control

92

NC

-

Not used

93

CDMUTE_IN

I

Muting on/off control signal input from the CD system control

94

CDON_IN

I

CD servo power supply detection input terminal

95

CDMON_IN

I

CD mecha power supply detection input terminal

96

TEST_IN

I

Test mode setting terminal    "L": test mode

97

DEBUG

I

Debug mode setting terminal    "H": debug mode

98 to 100

AREASEL0 to AREA-

SEL2

I

Model destination signal input terminal