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Pin No.

Pin Name

I/O

Function

1

SEEKOUT

O

2

AF SEEK

O

PLL low-pass filter time constant selection signal output at AF SEEK
“H” is output when AF SEEK

3

WIDE

O

4

ST-MONO

I/O

5

TU-ATT

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 (IC506)
“H”: FM power on, “L”: AM power on

7

TU-ON

O

Tuner system power supply on/off control signal output to the BA3918 (IC506)
“H”: tuner power on

8

VCC

—

Power supply terminal (+5V)

9

CSV-RST

O

Reset signal output to the RSC-164 (IC901) and flash memory (IC902)     “L”: reset

10

BUS-ON

O

Bus on/off control signal output to the MD mechanism controller (IC501) and SONY bus
interface (IC504)    “L”: bus on

11

SYSRST

O

Reset signal output to the MD mechanism controller (IC501) and SONY bus interface (IC504)    “
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 (IC900)

14

LCD CKO

O

Serial data transfer clock signal output to the liquid crystal display driver (IC900)

15

BEEP

O

Beep sound drive signal output terminal

16

LCD CE

O

Chip enable signal output to the liquid crystal display driver (IC900)    “H” active

17

UNISI

I

Serial data input from the SONY bus interface (IC504)

18

UNISO

O

Serial data output to the SONY bus interface (IC504)

19

UNICKIO

I/O

Serial data transfer clock signal in/out terminal with the MD mechanism controller (IC501) and
SONY bus interface (IC504)

20

CSV-SI

I

Serial data input from the RSC-164 (IC901)

21

CSV-SO

O

Serial data output to the RSC-164 (IC901)

22

CSV-CKO

O

Serial data transfer clock signal output to the RSC-164 (IC901)

23

CSV-CE

O

Chip enable signal output to the RSC-164 (IC901)    “H” active

24

SIRCS

I

Sircs remote control signal input from the remote control receiver (IC901)

25

PLLSI

I

PLL serial data input from the FM/AM PLL (IC4)

26

PLLSO

O

PLL serial data output to the FM/AM PLL (IC4)

27

PLLCKO

O

PLL serial data transfer clock signal output to the FM/AM PLL (IC4)

28

PLLCE

O

PLL chip enable signal output to the FM/AM PLL (IC4)    “H” active

29

ILL-ON

O

30

DIMMER

I/O

Power on/off control signal output of the illumination LED and liquid crystal display driver
(IC900)    “H”: power on    Depends on initial setting of power select switch (SW500)
Power select switch (SW500) on: “H” output at the accessory on
Power select switch (SW500) off: “H” output at the power on

Dimmer control in/out terminal
At initial mode: The presence of dimmer select function is set (if this status, if “L” is input, the
dimmer select function is present)
At normal mode: LCD back light brightness control signal output

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

IF band select signal output to the FM/AM tuner unit (TU1)    “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

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

– 86 –

Pin No.

Pin Name

I/O

Function

31

TIR-IND

O

LED drive signal output of the TIR indicator (LED701)    “H”: LED on

32

LCDINH

O

Blank indicate control signal output to the liquid crystal display driver (IC900)    “L”: no display

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    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

38

DVCC

—

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

39

DVSS

—

Ground terminal (for D/A converter)

40

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”

41

LCDANG

O

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

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) (LSW900, S900, LSW901 to LSW908)    OFF, SEEK/AMS 

0

= – + + ), MODE, SOURCE, SOUND, DSPL, SHIFT, 1, 2, 3 keys input

47

KEYIN1

I

Key input terminal (A/D input) (LSW701, LSW909 to LSW918)
6, LIST, AF/TA, TIR, 10, 9, 8, 7, 6, 5, 4 keys input

48

RC-IN0

I

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

49

VRSW

O

Power on/off control signal output for the RSC-164 (IC901), flash memory (IC902) and program
ROM (IC903) power supply    “H”: power on

50

DSTSEL1

I

Destination setting terminal (fixed at 1/4 voltage)

51

DSTSEL2

I

Destination setting terminal (fixed at “L”)

52

MTP

I

Multi-path input from the RDS decoder (IC701)

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

56

POWSEL

I

Power select switch (SW500) input terminal    “L”: on (operation mode), “H”: off (halt mode)

57

EQ-SEL

I

Not used (fixed at “H”)

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 illumination LED (LED702, 703)    “H”: LED on
“H” is output to turn on LED when front panel is opened

60

TIR-PLAY

O

AM/TIR selection signal output to the IC704    “L”: AM signal, “H”: TIR signal

61

SUB-SW1

O

Sub woofer output cut-off frequency select signal output terminal

62

SUB-SW0

O

Sub woofer output cut-off frequency select signal output terminal

63

VSS

—

Ground terminal

64

VOLCE

O

Chip enable signal output to the main electrical volume (IC400)    “H”: active

65

ATT

O

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

66

VOLSO/

SUBSO

O

Serial data output to the main electrical volume (IC400) and sub electrical volume (IC403)

67

VOLCKO/

SUBCKO

O

Serial data transfer clock signal output to the main electrical volume (IC400) and sub electrical
volume (IC403)

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

Internal RAM reset detection signal input from the RN5VD33AA (IC503)
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset

– 87 –

Pin No.

Pin Name

I/O

Function

68

SUBCE

O

Chip enable signal output to the sub electrical volume (IC403)    “H” active

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

RDSSI

I

Serial data input from the RDS decoder (IC701)

71

RDSCKO

O

Serial data reading clock signal output to the RDS decoder (IC701)

72

RC-IN1

I

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

73

X1A

O

Sub system clock output terminal (32 kHz)

74

X0A

I

Sub system clock input terminal (32 kHz)

75

DAVN

I

Data transmit completed detect signal input from the RDS decoder (IC701)    “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 (IC504) 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

79

TEL-ATT

I

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

80

NOSESW

I

Front panel block remove/attach detection switch (SW503) signal input terminal
“L”: front panel is attached

81

ACC IN

I

Accessory detect signal input terminal    “L”: accessory on

82 to 85

TIR-D0 to TIR-D3

I/O

Two-way data bus with the MSM6688GS (IC703)

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 (IC505) and reset switch (SW701)
“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

TIR-BUSY

I

Busy detection signal input from the MSM6688GS (IC703)
“H” is output while MSM6688GS (IC703) is executing a command

96

TIR-WR

O

Data write strobe signal output to the MSM6688GS (IC703)
“L” is output when data (D0 to D3) are output to the MSM6688GS (IC703)

97

TIR-CE

O

98

TIR-CE

O

99

TIR-RES

O

Reset signal output to the MSM6688GS (IC703)    “H”: reset

100

TIR-PDOWN

O

Power down control signal output to the MSM6688GS (IC703)    “L”: power down

101

TIR-RD

O

Data read strobe signal output to the MSM6688GS (IC703)
“L” is output when data (D0 to D3) are output to the MSM6688GS (IC703)

102

MTLIN

I

Not used (fixed at “L”)

103

AM STIN

I

Not used (fixed at “L”)

104

LOCK

I

Mini-disc lock detection signal input from the MD mechanism controller (IC501)    “H”: lock
CLV lock status input in test mode

105 to108

POS0 to POS3

I

Not used (fixed at “L”)

109

MD-ATT

I

The audio muting control signal is input from the MD mechanism controller (IC501), and output
to ATT (pin ^∞)

Chip enable signal output to the MSM6688GS (IC703)
TIR-WR (pin (§) or TIR-RD (pin `⁄‚⁄) is accepted when CE is “L” or CE is “H” respectively
TIR-WR (pin (§) or TIR-RD (pin `⁄‚⁄) is not accepted when CE is “H” or CE is “L” respectively

– 88 –

Pin No.

Pin Name

I/O

Function

110

BBE

O

Not used (open)

111

LINKOFF

O

Not used (pull down)

112

LO

O

Not used (open)

113

PRO

O

Not used (open)

114

DM0

O

Not used (pull down)

115

DM1

I/O

Not used (open)

116

IIS

I/O

Not used (open)

117

CSV-NAR

I

“H” is input when RS-164 (IC901) sends data

118

LED-ON

O

Illumination LED drive signal output terminal    “H”: LED on
Also, power amp (IC600) standby on/off control is executed    “L”: standby, “H”: amp on

119

VSS

—

Ground terminal

120

POWON

O

Main system power supply on/off control signal output to the BA3918 (IC506)    “H”: power on