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– 73 –

•

Pin No.

Pin Name

I/O

Function

1 to 5

TIN3 to TIN7

I/O

Input of the 4

×

8 matrix test keys (“L” is always output, except in test mode)     Not used (open)

6

LOAD

O

Loading motor control signal output to the motor driver (IC305)    “H” active    *1

7

EJECT

O

Loading motor control signal output to the motor driver (IC305)    “H” active    *1

8, 9

NCO

O

Not used (open)

10

MDMON

O

Power supply on/off control signal output of the MD mechanism deck section main power supply 
and loading motor drive (IC305) power supply    “H”: power on

11

E-SW

I

Inputs the disc loading completion detect switch detection signal
“L”: When completed of the disc loading operation

12

AG-OK

O

Output of aging status in test mode   “L”: under aging,  “H”: aging completed    Not used (open)

13

ADJ-OK

O

Output of status when aging completed in test mode    “L”: aging NG, “H”: aging OK
Not used (open)

14 to 17

NCO

O

Not used (open)

18

DFCTSEL

I

Select whether defect function is used for the CXD2652AR (IC301)
“L”: used this function , “H”: not used this function (fixed at “H” in this set)

19

DPLLSEL

I

Select whether digital PLL function is used for the CXD2652AR (IC301)
“L”: used this function , “H”: not used this function (fixed at “H” in this set)

20

EMPHSEL

I

Select whether emphasis signal output from pin or unilink data
“L”: outputs from both pin and unilink data, “H”: output from pin only (fixed at “H” in this set)

21

LOCK

O

Mini-disc lock detection signal output to the master controller (IC700)    “H”: lock

22

NCO

O

Not used (open)

23

2M/4M

I

Select whether D-RAM capacitance 2M bit or 4M bit    “L”: 4M bit (external D-RAM) , “H”: 2M 
bit (internal D-RAM of CXD2652AR) (fixed at “L” in this set)

24, 25

NCO

O

Not used (open)

26

MNT0

I

Focus OK signal input from the CXD2652AR (IC301)
“H” is input when focus is on (“L”: NG)

27

MNT1

I

Track jump detection signal input from the CXD2652AR (IC301)

28

MNT2

I

Busy monitor signal input from the CXD2652AR (IC301)

29

MNT3

I

Spindle servo lock status monitor signal input from the CXD2652AR (IC301)

30

RESET

I

System reset signal input from the master controller (IC700), reset signal generator (IC801) and 
reset switch (S900)    “L”: reset    For several hundreds msec. after the power supply rises, “L” is 
input, then it changes to “H”

31

EXTAL

O

Main system clock output terminal (10 MHz)

32

XTAL

I

Main system clock input terminal (10 MHz)

33

VSS

—

Ground terminal

34

TX

O

Sub system clock output terminal (32.768 kHz)    Not used (open)

35

TEX

I

Sub system clock input terminal (32.768 kHz)    Not used (fixed at “L”)

36

AVSS

—

Ground terminal (for A/D converter)

37

AVREF

I

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

38

INIT

I

Initial reset signal input terminal (A/D input) (fixed at “H”)

39

TEMP

I

Temperature sensor (TH501) input terminal (A/D input)

40

ACNT

I

Select the number of load/eject aging times (A/D input)
0H – 54H (30 times), 55H – OA9H (20 times), OAAH – OFFH (10 times)

41

DO-SEL

I

Select the digital output bits (A/D input)

42

EE-CS

O

Chip select signal output to the external EEPROM device    Not used (open)

43

EE-CKO

O

Serial data transfer clock signal output to the external EEPROM device    Not used (open)

44

EE-SIO

I/O

Two way data bus with the external EEPROM device    Not used (open)

45

MD-SO

O

Writing serial data signal output to the CXD2652AR (IC301) and CXA2523R (IC302)

46

LINKOFF

O

Unilink on/off control signal output for the SONY bus    “L”: link on, “H”: link off

– 74 –

*1  Loading motor (M903) control

LOAD (pin 6)

“H”

“L”

“H”

“L”

EJECT (pin 7)

“L”

“H”

“H”

“L”

Terminal

Operation

IN

OUT

BRAKE

STOP

Pin No.

Pin Name

I/O

Function

47

UNIREQ

O

Data request signal output terminal (for SONY bus)    “H”: request on    Not used (open)

48

UNICKIO

I/O

Serial clock signal input from the master controller (IC700) or serial clock signal output to the 
SONY bus interface (IC600) and master controller (IC700) (for SONY bus)

49

UNISI

I

Serial data input from the SONY bus interface (IC600)

50

UNISO

O

Serial data output to the SONY bus interface (IC600)

51

MD-CKO

O

Serial data transfer clock signal output to the CXD2652AR (IC301) and CXA2523R (IC302)

52

MD-SI

I

Reading serial data signal input from the CXD2652AR (IC301)

53

NCO

O

Not used (open)

54

SENS

I

Internal status (SENSE) input from the CXD2652AR (IC301)

55

CC-XINT

I

Interrupt status input from the CXD2652AR (IC301)

56

LIMIT-IN

I

Detection input from the sled limit-in detect switch
The optical pick-up is inner position when “L”

57

EJT-KEY

I

Eject request signal input terminal    “L”: eject on    Not used (fixed at “H”)

58

ERROR-PWM

O

PWM error monitor output terminal (C1and ATER is output when test mode)    Not used (open)

59

MD-RST

O

Reset signal output to the PCM1718E (IC101), CXD2652AR (IC301) and BH6511FS (IC303)    
“L”: reset

60

BU-IN

I

Battery detect signal input from the SONY bus interface (IC600) and battery check circuit
“H”: battery on

61

BUS-ON

I

SONY bus on/off control signal input from the master controller (IC700)    “L”: bus on

62

SQSY

I

Subcode Q sync (SCOR) input from the CXD2652AR (IC301)
“L” is input every 13.3 msec    Almost all, “H” is input

63

C-SW

I

Inputs the disc loading start or disc eject completion detect switch detection signal
“L”: When start or eject completed of the disc loading operation

64

MD-LAT

O

Serial data latch pulse signal output to the CXD2652AR (IC301) and CXA2523R (IC302)

65

MD-ON

O

Power supply on/off control signal output of the MD mechanism deck section main power supply  
“H”: power on

66

DEEMP

O

Emphasis on/off control signal output to the PCM1718E (IC101)    “H”: emphasis on

67

A-MUTE

O

Audio muting on/off control signal output terminal

68

NCO

O

Not used (open)

69

TSTCKO

O

Output of clock signal for the test mode display    Not used (open)

70

TSTSO

O

Output of data for the test mode display    Not used (open)

71

TSTMOD

I

Setting terminal for the test mode    “L”: test mode, “H”: normal mode

72

VCC

—

Power supply terminal (+5V)

73

NIL

I

Not used (fixed at “H”)

74 to 77

TOUT0 to TOUT3

O

Output of the 4

×

8 matrix test keys     Not used (open)

78 to 80

TIN0 to TIN2

I/O

Input of the 4

×

8 matrix test keys (“L” is always output, except in test mode)     Not used (open)

– 75 –

•

Pin No.

Pin Name

I/O

Function

1 to 7

NC

O

Not used (open)

8

VCC

—

Power supply terminal (+5V)

9

PLL SI

I

PLL serial data input terminal    Not used (open)

10

PLL SO

O

PLL serial data output terminal    Not used (open)

11

PLL CKO

O

PLL serial data transfer clock signal output terminal    Not used (open)

12

DOOR-SW

I

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

13

LCD SO

O

Serial data output to the liquid crystal display driver (IC501)

14

LCD CKO

O

Serial data transfer clock signal output to the liquid crystal display driver (IC501)

15

BEEP

O

Beep sound drive signal output terminal

16

DBMOD2

O

D-BASS mode control signal output terminal    Not used (open)

17

NOSE-SW

I

Front panel open/close detection switch (S901) input
“L” is input when the front panel is closed

18, 19

NC

O

Not used (open)

20

UNI SI

I

Serial data input from the SONY bus interface (IC600)

21

UNI SO

O

Serial data output to the SONY bus interface (IC600)

22

UNI CKIO

I/O

Serial clock signal output to the MD mechanism controller (IC501) and SONY bus interface 
(IC600) or serial clock signal input from the MD mechanism controller (IC501) (for SONY bus)

23

NC

O

Not used (open)

24

SIRCS

I

Sircs remote control signal input from the remote control receiver (IC502)

25

PACK-IND

O

LED drive signal output of the MD disc slot illumination and 

6 indicator (LED891, LSW890)    

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

26

VOL SO

O

Serial data output for the electrical volume    Not used (open)

27

VOL CKO

O

Serial data transfer clock signal output for the electrical volume    Not used (open)

28

DSTSEL0

I

Destination setting terminal
(Except German models: fixed at “H”, German model: fixed at “L”)

29

SYSRST

O

System reset signal output to the MD mechanism controller (IC501) and SONY bus interface 
(IC600)    “L”: reset

30

DSTSEL1

I

Destination setting terminal
(US, Canadian models: fixed at “H”, E model: fixed at “L”)

31

DBMOD1

O

D-BASS mode control signal output terminal    Not used (open)

32

TESTIN

I

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

33

VSS

—

Ground terminal

34

C

—

Connected to coupling capacitor for the power supply

35

NS-MASK

O

Discharge control signal output for the noise detection circuit   “H”: discharge
Used for the MDX-C7970R only (MDX-C7970: Not used (open))

36

BUS- ON

O

Bus on/off control signal output to the MD mechanism controller (IC501) and SONY bus 
interface (IC600)    “L”: bus on

37

AD-ON

O

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

38

DVCC

—

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

39

DVSS

—

Ground terminal (for D/A converter)

40

LCDANG

O

View field angle control signal is output when front panel is fully opened
“H”: front panel is fully opened

41

VOL CE

O

Chip enable signal output for the electrical volume    Not used (open)

42

AVCC

—

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

– 76 –

Pin No.

Pin Name

I/O

Function

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

KEY-IN0

I

Key input terminal (A/D input) (LSW531, LSW532, S502, LSW533 to LSW538)
OFF, SOURCE, SEEK/AMS 

+ ) +  = 0 – , DSPL, SOUND, MODE, SHIFT, 1, 2 

keys input (LSW533  DSPL: MDX-C7970R only)

47

KEY-IN1

I

Key input terminal (A/D input) (LSW890, LSW512 to LSW521)
6, AF/TA (MDX-C7970R)  LIST (MDX-C7970), LIST PTY (MDX-C7970R)  DSPL (MDX-
C7970), 10 to 3 keys input

48

KEY-IN2

I

Key input terminal (A/D input)    Not used (fixed at “L”)

49

RC-IN0

I

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

50

D-BASS IN

I

D-BASS switch (S501) input terminal (A/D input)

51

QUALITY

I

Noise level detection signal input at SEEK mode (A/D input)
Used for the MDX-C7970R only (MDX-C7970: Not used (open))

52

MPDH (MTP)

I

Multi-path detection signal input from the RDS decoder (IC102) (A/D input)
Used for the MDX-C7970R only (MDX-C7970: Not used (open))

53

S-METER

(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

AMP ATT

O

Power amp muting on/off control signal output to the power amplifier (IC500)
“L”: muting on

56

AMP ON

O

Standby on/off control signal output to the power amplifier (IC500)
“L”: standby mode, “H”: amp on

57

ILL IN

I

Auto dimmer control illumination line detection signal input terminal
“L” is input at dimmer detection

58

LOCK IN

I

Mini-disc lock detection signal input from the MD mechanism controller (IC501)    “H”: lock

59

EMPH ON

O

Emphasis control signal output terminal    Not used (open)

60

AU ATT

O

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

61

AF ATT

O

Preamp muting on/off control signal output to the electrical volume (IC300)    “H”: muting on

62

TU-ATT

O

Muting on/off control signal output of the FM tuner signal    “H”: muting on
Used for the MDX-C7970R only (MDX-C7970: Not used (open))

63

VSS

—

Ground terminal

64

ACC IN

I

Accessory detect signal input terminal    “L”: accessory on

65

AF-SEEK

O

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

66

WIDE

O

67

DAVN

I

Data transmit completed detect signal input from the RDS decoder (IC102)    “H” active
Used for the MDX-C7970R only (MDX-C7970: Not used (open))

68

NARROW

O

Narrow select signal output terminal    “H” active
Used for the MDX-C7970R only (MDX-C7970: Not used (open))

69

SSTOP

I

IF counter request signal input from the FM/AM PLL (IC100)

70

SDA

I/O

Two-way data bus with the FM/AM PLL (IC100), RDS decoder (IC102) and electrical volume 
(IC300) (RDS decoder is MDX-C7970R only)

71

SCL

O

Bus clock signal output to the FM/AM PLL (IC100), RDS decoder (IC102) and electrical volume 
(IC300) (RDS decoder is MDX-C7970R only)

72

RC-IN1

I

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

73

X1A

O

Sub system clock output terminal (32.768 kHz)

IF band select signal output terminal    “H”: wide mode
In receiving FM signals, interference noise from adjacent stations is removed by narrowing the 
IF band automatically in the tuner unit so as to raise the selectivity, but in this case, the distortion 
may increase and accordingly, the IF band is widened forcibly
Used for the MDX-C7970R only (MDX-C7970: Not used (open))