XR-C5110R, XR-C5120R - Sony Car Audio Service Manual (repair manual). Page 31

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Pin No.

Pin Name

I/O

Function

38

DVCC

—

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

39

DVSS

—

Ground terminal (for D/A converter)

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 LSW903, S901, LSW905, LSW906)
OFF, SOURCE, MODE  

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

input

47

KEYIN1

I

Key input terminal (A/D input) (LSW921 to LSW923, LSW925 to LSW933)
6, PRESET DISC –/+, AF/TA, PTY, DSPL, 6, 5, 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 (AEP and UK models: fixed at “L”, German model: fixed at “H”)

50

NOISE DET

I

Noise level detection signal input at SEEK mode (A/D input)

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 (IC51)

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 terminal
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset    Fixed at “H” in this set

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 door indicator    “H”: LED on
“H” is output to turn on LED when front panel is opened    Not used (open)

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 “L” 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, 67

NCO

O

Not used (open)

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 RDS decoder (IC51) and electrical volume (IC401)

71

I2C CKO

O

Bus clock signal output to the RDS decoder (IC51) and 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 (IC51)    “H” active

76

KEYACK

I

Input of acknowledge signal for the key entry    Acknowledge signal is input to accept function 
and eject keys in the power off status    On at input of “H”