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53

•

Pin No.

Pin Name

I/O

Description

1

NC

I

Not used (fixed at “L”)

2

AMSIN

I

Input terminal of whether a music is present or not is detected at auto music sensor
“L”: music is not present, “H”: music is present    Not used (fixed at “L”)

3

AMSON

O

Tape auto music sensor control signal output terminal
“L” is output to lower the gain for audio level at FF/REW mode    Not used (open)

4

SA LAT

O

Serial data latch pulse output for spectrum analyzer section to the liquid crystal display drive 
controller (IC701)

5

ATT

O

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

6

SYSRST

O

System reset signal output to the MD mechanism controller (IC501), liquid crystal display drive 
controller (IC701) and SONY bus interface (IC601)    “L”: reset

7

F/R

O

Tape detection signal output terminal    “L”: reverse side, “H”: forward side    Not used (open)

8

VCC

—

Power supply terminal (+5V)

9

MTLIN

I

Auto metal detection signal input terminal     Not used (fixed at “L”)

10

T.ROM-SDA

I/O

Two-way data bus for tuner EEPROM with the FM/AM tuner unit (TUX201)

11

T.ROM-SCL

O

Tuner EEPROM bus clock signal output to the FM/AM tuner unit (TUX201)

12

RX

I

Input terminal at the flash memory data write mode
Front panel open/close detection signal input terminal
“L” is input when the front panel is closed

13

TX

O

Output terminal at the flash memory data write mode
Display serial data output to the liquid crystal display driver (IC901)

14

BUS-ON

O

Bus on/off control signal output to the MD mechanism controller (IC501), liquid crystal display 
drive controller (IC701) and SONY bus interface (IC601)    “L”: bus on

15

BEEP

O

Beep sound drive signal output terminal

16

NC

O

Not used (open)

17

UNISI

I

Serial data input from the SONY bus interface (IC601)

18

UNISO

O

Serial data output to the SONY bus interface (IC601)

19

UNICKO

O

Serial clock signal output to the MD mechanism controller (IC501), liquid crystal display drive 
controller (IC701) and SONY bus interface (IC601)

20

IF-BW

I

Tuner wide/narrow select signal input terminal    “L”: wide, “H”: narrow
Not used (fixed at “L”)

21

SW SHIFT

O

Not used

22, 23

NC

O

Not used (open)

24

SIRCS

I

Sircs remote control signal input from the remote control receiver (IC951)

25

DSPSI

I

Serial data input from the CXD2726Q (IC805)

26

DSPSO

O

Serial data output to the CXD2726Q (IC805)

27

DSPCKO

O

Serial data transfer clock signal output to the CXD2726Q (IC805) and liquid crystal display drive 
controller (IC701)

28

DSPPLL

O

PLL clock control signal output to the CXD2726Q (IC805)
At “L” is output: fixed at “L” is PLCLK (pin ia of IC805 CXD2726Q)
At “H” is output: PLL clock signal output to the PLCLK  (pin ia of IC805 CXD2726Q)

29

DSPMST

O

Bit clock (BCK) and L/R sampling (LRCK) signal master/slave mode selection signal output to 
the CXD2726Q (IC805)    “L”: master mode, “H”: slave mode

30

NC

O

Not used (open)

31

VOLATT

O

Pre amplifier muting on/off control signal output to the electrical volume (IC301)
“L”: muting on

32

TUMUTE

O

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

33

VSS

—

Ground terminal

34

C

—

Connected to coupling capacitor for the power supply    Not used (open)

54

Pin No.

Pin Name

I/O

Description

35

DSPLAT

O

Serial data latch pulse output to the CXD2726Q (IC805)

36

DSPRST

O

Reset signal output to the CXD2726Q (IC805)    “L”: reset

37

ANT CUT

O

Tuner system power supply on/off control signal output terminal    “H”: tuner power on
Not used (open)

38

DVCC

—

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

39

DVSS

—

Ground terminal (for D/A converter)

40, 41

NC

O

Not used (open)

42

AVCC

—

Power supply terminal (+5V) (for analog system)

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 analog system)

46

KEYIN0

I

Key input terminal (A/D input) (LSW901 to LSW908, S901 to S904)
OFF, SOURCE, SOUND EQ, MENU, PTY DSPL (MDX-C8500R), DSPL (MDX-C8500X), 
LIST, ENTER, MODE, SEEK/AMS - . m + > M, DISC/PRST +, PRST/DISC - keys 
input

47

KEYIN1

I

Key input terminal (A/D input) (LSW751, LSW909 to LSW917)
Z, DSO, TA, AF, 6 to 3 SHUF 2, REP 1 keys input
 (LSW910 TA, LSW911 AF: MDX-C8500R ONLY)

48

RCIN0

I

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

49

DSTSEL

I

Destination setting terminal (A/D input)    “L”: MDX-C8500X/C8500R (TYPE A),
 “M”: MDX-C8500R (TYPE C), “H”: MDX-C8500R (TYPE B)

50

QUALITY

I

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

51

FMAGC

I

FM AGC detection signal input from the FM/AM tuner unit (TUX201) (A/D input)

52

MTP

I

Multi-path detection signal input from the RDS decoder (IC201) (A/D input)
Used for the MDX-C8500R only (MDX-C8500X: Not used open))

53

VSM

I

FM and AM signal meter voltage detection input from the FM/AM tuner unit (TUX201)
(A/D input)

54

VCC

—

Power supply terminal (+5V)

55

AMPON

O

Standby on/off control signal output terminal
“L”: standby mode, “H”: amplifier on

56

NS-MASK

O

Discharge control signal output for the noise detection circuit   “H”: discharge
Used for the MDX-C8500R only (MDX-C8500X: Not used open))

57

MTLOUT

O

METAL output terminal (METAL on at “L” output)    Not used (open)

58

REEL

I

Rotation detect signal input terminal    Not used (fixed at “L”)

59

POS0

I

60

POS1

I

61

POS2

I

62

POS3

I

63

VSS

—

Ground terminal

64

NC

I

Not used (fixed at “L”)

65

F OSC

I

Frequency count terminal from power control (IC302)

66

LM-LOD

O

Loading motor control signal output terminal    “H” active
(For the loading direction and forward side operation)    Not used (open)

67

CM ON

O

Capstan/reel motor control signal output terminal    “H”: motor on    Not used (open)

68

TAPE ON

O

Tape system power supply on/off control signal output terminal    “H”: tape on    Not used (open)

69

FLASH-W

I

Internal flash memory data write mode detection signal input terminal    Not used

70

I2C SDA

I/O

Two-way data I2C bus with the FM/AM tuner unit (TUX201), RDS decoder (IC201) and 
electrical volume (IC301) (RDS decoder is MDX-C8500R only)

71

I2C CKO

O

I2C bus clock signal output to the FM/AM tuner unit (TUX201), RDS decoder (IC201) and 
electrical volume (IC301) (RDS decoder is MDX-C8500R only) 

Tape position (EJECT/FF/REW/REV/
FWD mode) detect input from the tape 
operation switch on the deck mechanism   
Not used this function (fixed at “L”)

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

55

Pin No.

Pin Name

I/O

Description

72

RCIN1

I

Rotary remote commander shift key input terminal

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 detection signal input from the RDS decoder (IC201)    “L” active
Used for the MDX-C8500R only (MDX-C8500X: Not used open))

76

CDMD ON

I

CD/MD on/off control signal input from the MD mechanism controller (IC501)

77

BU-IN

I

Battery detection signal input from the SONY bus interface (IC601) and battery detect circuit
“L” is input at low voltage

78

DSPREADY

I

Transfer enable signal input from the CXD2726Q (IC805)
“L”: transfer prohibition , “H”: transfer permission

79

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”

80

AD ON

O

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

81

ACCIN

I

Accessory detection signal input terminal    “L”: accessory on

82

FLASH ON

O

Power on/off control signal output of the illumination LED and liquid crystal display driver 
(IC901)    “H”: power on

83

PW-ON

O

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

84

TESTIN

I

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

85

RAMBU

I

Internal RAM reset detection signal input from the RN5VD33AA (IC504)
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset

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 (IC503) and reset switch (S101)
“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

ILLIN

I

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

96

TELATT

I

Telephone detection signal input terminal    At input of “H”, the signal is attenuated by –20 dB

97

EMPH

I

Emphasis control signal input from the MD Mechanism controller (IC501)

98

F CH

O

Frequency changing terminal from the power control (IC302)    “H”: frequency change

99 to 102

NC

O

Not used (open)

103

4V SEL

I

Input terminal of whether line driver is mounted or not is detected
“L”: line driver is not mounted (MDX-C8500R), “H”: line driver is mounted (MDX-C8500X)

104

COL SEL

I

Setting terminal for the illumination color
“L”: 2 color (MDX-C8500R), “H”: 1 (red) color (MDX-C8500X)

105

AMPATT

O

Power amplifier muting on/off control signal output terminal    “H”: muting on

106

BOOT

O

Serial data output to the liquid crystal display drive controller (IC701)

107

DSP GAIN

O

Not used (open)

108

NC

O

Not used (open)

109

XR CDMD

I

Setting terminal for the internal mechanism tape or CD/MD
“L”: tape, “H”: CD/MD (fixed at “H” in this set)

110

DSP ON

O

Power supply on/off control signal output for the CXD2726Q (IC805)    “H”: DSP on

56

Pin No.

Pin Name

I/O

Description

111

CD MD

I

Setting terminal for the internal mechanism CD or MD
“L”: CD, “H”: MD (fixed at “H” in this set)

112

NC

I

Not used (fixed at “L”)

113

TUNON

O

Tuner system power supply on/off control signal output terminal
“H”: tuner power on

114

NC

I

Not used (fixed at “L”)

115

REIN1

I

Dial pulse input of the rotary encoder (RE901) (A phase input) 
(for VOLUME/BASS/TREBLE/BALANCE/FADER control)

116

REIN0

I

Dial pulse input of the rotary encoder (RE901) (B phase input)
 (for VOLUME/BASS/TREBLE/BALANCE/FADER control)

117

NOSE-SW

I

Front panel block remove/attach detection signal input from the nose detection switch (S102)
“L”: front panel is attached

118

DOORIND

O

LED drive signal output of the MD disc slot illumination and Z indicator (LED751, LSW751)
“H”: LED on    “H” is output to turn on LED when front panel is opened

119

VSS

—

Ground terminal

120

DOLBY

O

Dolby control terminal    “H”: dolby on    Not used (open)