XR-C7220, XR-C7300, XR-C7300W - Sony Car Audio Service Manual (repair manual). Page 28

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Pin No.

Pin Name

I/O

Function

40, 41

NCO

O

Not used (open)

42

AVCC

—

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

43

AVRH

I

Reference voltage (+5V) input terminal (for A/D converter)

44

AVRL

I

Reference voltage (0V) input terminal (for A/D converter)

45

AVSS

—

Ground terminal (for A/D converter)

46

KEYIN0

I

Key input terminal (A/D input) (LSW901 to LSW904, S901, LSW906)
OFF, SOURCE, MODE  

*, SOUND, SEEK/AMS = 0 –  + ) +, SHIFT keys

input

47

KEYIN1

I

Key input terminal (A/D input)
(LSW801, LSW922, LSW923, LSW925, LSW926, LSW928 to LSW933)
6, PRESET DISC –/+, DSPL, 6, 5 ENTER, 4 n, 3 PLAY MODE, 2 SET UP, 1 N keys input

48

RC-IN0

I

Rotary remote commander key input terminal (A/D input)

49

DSTSEL

I

Destination setting terminal (fixed at “L”)

50

NOISE DET

I

Noise level detection signal input at SEEK mode (A/D input)    Not used (open)

51

D-BASS

I

D-BASS switch (S981) input terminal (A/D input)

52

MTP

I

Multi-path detection signal input from the RDS decoder    Not used (fixed at “L”)

53

VSM

I

FM and AM signal meter voltage detection input from the FM/AM tuner unit (TU1)
(A/D input)

54

VCC

—

Power supply terminal (+5V)

55

RAMBU

I

Internal RAM reset detection signal input from the XC61BN3312MR (IC651)
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset

56

POWSEL

I

Power select switch (S501) input terminal    “L”: off (halt mode), “H”: on (operation mode)

57

NCO

O

Not used (open)

58

TESTIN

I

Setting terminal for the test mode    “L”: test mode, Normally: fixed at “H”

59

DOOR-IND

O

LED drive signal output of the tape window illumination and 

6 indicators (LED801, LSW801)    

“H”: LED on    “H” is output to turn on LED when front panel is opened

60

EVOL MUTE

O

Muting control signal output to the electrical volume (IC401)
Volume minimum: “

∞

” output (“H” active)

61

COLR SW

I

Setting terminal for the illumination color
“L”: 2 colors, “H”: 1 color (fixed at “L” in this set)

62

COLR SEL

I

Setting terminal for the illumination color    “L”: amber, “H”: green (fixed at “H” in this set)

63

VSS

—

Ground terminal

64

NCO

O

Not used (open)

65

MUTE

O

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

66

FILE

I

Input terminal to set whether custom file function is provided or not
“L”: none, “H”: provided (Fixed at “H” in this set)

67

TEXT

I

Input terminal to set whether CD text function is provided or not
“L”: none, “H”: provided (Fixed at “H” in this set)

68

AMP MUTE

O

Muting on/off control signal output to the power amplifier (IC611)    “L”: muting on

69

FLASH-W

I

Internal flash memory data write mode detection signal input terminal    “L”: data write mode
Not used (fixed at “H” in this set)

70

I2C SIO

I/O

Two-way data bus with the electrical volume (IC401)

71

I2C CKO

O

Bus clock signal output to the electrical volume (IC401)

72

RC-IN1

I

Rotary remote commander shift key input terminal    “L”: shift

73

X1A

O

Sub system clock output terminal (32.768 kHz)

74

X0A

I

Sub system clock input terminal (32.768 kHz)

75

DAVN

I

Data transmit completed detect signal input from the RDS decoder    “H” active
Not used (fixed at “L”)