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OVER VOLTAGE

PROTECT

REGULATOR

1

2 3 4

5

6

7

8

9

10

12

11

NC

MODE2

MODE1

STB

VDD

AMP

VCC

ANT

COM

AM

FM

GND

1

2

3

4
5

6

7

8

9

10

14

13

12

11

BUS ON

SWITCH

RESET

SWITCH

BATTERY

SWITCH

BUS ON

RST

BATT

CLK

VREF

DATA

GND

VCC

RST
BUS ON

CLK IN

BU IN

DATA IN

DATA OUT

– 42 –

•

Pin No.

Pin Name

I/O

Function

1

SEEKOUT

O

Seek control signal output to the FM/AM tuner unit (TU1)
AM mode: Used for IF count output/SD output request/AGC cut at SEEK or BTM
FM mode: Used for SD speed up at SEEK, BTM, or AF
“L” is output at tuner off

2

AF-SEEK

O

PLL low-pass filter time constant selection signal output at AF SEEK
“H” is output when AF SEEK    Not used (open)

3

NCO

O

Not used (open)

4

ST-MONO

I/O

FM stereo broadcasting detection signal input from the FM/AM tuner unit (TU1), or forced 
monaural control signal output to the FM/AM tuner unit (TU1)
“L” is input in the FM stereo mode, or “L” is output in the forced monaural mode

5

TUNMUTE

O

Muting on/off control signal output of the FM and AM tuner signal    “H”: muting on

6

FM-ON

O

FM system power supply on/off control signal output to the BA3918 (IC671)
“L”: AM power on, “H”: FM power on

7

TU-ON

O

Tuner system power supply on/off control signal output to the BA3918 (IC671)
“H”: tuner power on

8

VCC

—

Power supply terminal (+5V)

9

NCO

O

Not used (open)

10

BUS-ON

O

Bus on/off control signal output to the SONY bus interface (IC701)    “L”: bus on

11

SYSRST

O

Reset signal output to the SONY bus interface (IC701)    “L”: reset

12

DOORSW

I

Front panel open/close detection signal input    “L” is input when the front panel is closed

13

LCD SO

O

Serial data output to the liquid crystal display driver (IC901)

14

LCD CKO

O

Serial data transfer clock signal output to the liquid crystal display driver (IC901)

15

BEEP

O

Beep sound drive signal output terminal

16

LCD CE

O

Chip enable signal output to the liquid crystal display driver (IC901)    “H” active

17

UNISI

I

Serial data input from the SONY bus interface (IC701)

18

UNISO

O

Serial data output to the SONY bus interface (IC701)

19

UNICKO

O

Serial data transfer clock signal output to the SONY bus interface (IC701)

20

SD-IN

I

Station detector detect input from the FM/AM tuner unit (TU1)
Stop level for SEEK, BTM, etc. is determined    SD is present at input of “H”

21 to 23

NCO

O

Not used (open)

24

SIRCS

I

Sircs remote control signal input terminal    Not used (fixed at “H”)

25

PLLSI

I

PLL serial data input from the FM/AM PLL (IC1)

26

PLLSO

O

PLL serial data output to the FM/AM PLL (IC1)

27

PLLCKO

O

PLL serial data transfer clock signal output to the FM/AM PLL (IC1)

28

PLLCE

O

PLL chip enable signal output to the FM/AM PLL (IC1)    “H” active

29

ILL-ON

O

30, 31

NCO

O

Not used (open)

32

NOISE ON

O

Discharge control signal output for the noise detection circuit    “H”: discharge

33

VSS

—

Ground terminal

34

C

—

Connected to coupling capacitor for the power supply

35

AD-ON

O

A/D converter power control signal output terminal
When the KEYACK (pin &§) that controls reference voltage power for key A/D conversion input 
is active, “L” is output from this terminal to enable the input

36

RE-IN0

I

37

RE-IN1

I

Power on/off control signal output of the illumination LED and liquid crystal display driver 
(IC901)    “H”: power on    Depends on initial setting of power select switch (S501)
Power select switch (S501) on: “H” output at the accessory on
Power select switch (S501) off: “H” output at the power on

Dial pulse input of the rotary encoder (RE900)
 (for VOLUME/BASS/TREBLE/BALANCE/FADER control)

– 43 –

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 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 to LSW933)
6, PRESET DISC –/+, AF/TA, PTY LIST, 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 (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 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 “H” 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

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 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)

– 44 –

Pin No.

Pin Name

I/O

Function

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”

77

BU-IN

I

Battery detect signal input from the SONY bus interface (IC701) and battery detect circuit
“L” is input at low voltage

78

ILL IN

I

Auto dimmer control illumination line detection signal input terminal
“L” is input at dimmer detection    Fixed at “L” in this set

79

TEL-ATT

I

Telephone muting signal input terminal    At input of “H”, the signal is attenuated by –20 dB
Used for the XR-C6220R only

80

NOSESW

I

Front panel block remove/attach detection switch (S504) input terminal
“L”: front panel is attached

81

ACC IN

I

Accessory detect signal input terminal    “L”: accessory on

82 to 85

NCO

O

Not used (open)

86

HSTX

I

Hardware standby input terminal    “L”: hardware standby mode    Reset signal input in this set

87

MD2

I

Setting terminal for the CPU operational mode (fixed at “L” in this set)

88

MD1

I

Setting terminal for the CPU operational mode (fixed at “H” in this set)

89

MD0

I

Setting terminal for the CPU operational mode (fixed at “H” in this set)

90

RESET

I

System reset signal input from the reset signal generator (IC652) and reset switch (S503)
“L”: reset    “L” is input for several 100 msec after power on, then it changes to “H”

91

VSS

—

Ground terminal

92

X0

I

Main system clock input terminal (3.68 MHz)

93

X1

O

Main system clock output terminal (3.68 MHz)

94

VCC

—

Power supply terminal (+5V)

95 to 99

NCO

O

Not used (open)

100

9K/10K

I

AM frequency step (9 kHz or 10 kHz) selection signal input terminal
“L”: 9 kHz, “H”: 10 kHz    Not used (fixed at “H”)

101

NCO

O

Not used (open)

102

NCO

I

Not used (open)

103

AMSIN

I

Whether a music is present or not from CXA2509AQ (IC301) is detected at auto music sensor
“L”: music is present, “H”: music is not present

104

REEL

I

Rotation detect signal input from supply reel sensor and take-up reel sensor on the deck 
mechanism

105

POS0

I

106

POS1

I

107

POS2

I

108

POS3

I

109

LM-EJ

O

Motor drive signal output to the loading/tape operation motor drive (IC361)    “H” active
(For the eject direction and reverse side operation)    *1

110

LM-LOD

O

Motor drive signal output to the loading/tape operation motor drive (IC361)    “H” active
(For the loading direction and forward side operation)    *1

111

CM-ON

O

Capstan/reel motor (M901) drive signal output terminal    “H”: motor on

112

TAPEON

O

Tape system power supply on/off control signal output terminal    “H”: tape on

113

N-ROUT

O

Forward/reverse direction control signal output to the CXA2509AQ (IC301)
“L”: forward direction, “H”: reverse direction

114

AMSON

O

Tape auto music sensor control signal output to the CXA2509AQ (IC301)
“L” is output to lower the gain for audio level at FF/REW mode

115

MTLON

I/O

METAL control in/out terminal
At initial mode: auto/manual mode selection input of METAL function (manual at “L” input)
At manual mode: METAL on/off control signal output terminal (METAL on at “H” output)
At auto mode: input at MTLIN (pin `⁄‚¤)    Used for the XR-C6220R only

Tape position (EJECT/FF/REW/
REV/FWD mode) detect input from 
the tape operation switch on the deck 
mechanism

POS0: “L”: EJECT mode, “H”: others mode
POS1: “L”: FF and FWD mode, “H”: others mode
POS2: “L”: REW mode, “H”: others mode
POS3: “L”: REV and EJECT mode, “H”: others mode