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µ

Pin No.

Pin Name

I/O

Function

1 to 3

S12 to S14

O

Segment drive signal output to the liquid crystal display (LCD901)

4 to 6

SEG17 to SEG15

O

Segment drive signal output to the liquid crystal display (LCD901)

7 to 20

SEG14 to SEG1

O

Segment drive signal output terminal    Not used (open)

21, 22

COM0, COM1

O

Common drive signal output to the liquid crystal display (LCD901)

23, 24

COM2, COM3

O

Common drive signal output terminal    Not used (open)

25

BIAS

O

Liquid crystal display drive bias control output terminal

26 to 28

VLC0 to VLC2

—

Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage

29

POWER ON

I/O

30

CD ON

I/O

31

12H/24H

I

Setting terminal for the time display (12/24-hour system)    “L”: 12H, “H”: 24H                              
(fixed at “L” in this set)

32

TRACKING

I

Setting terminal for the auto tracking adjustment function    “L”: auto tracking (fixed at “L”)

33

VSS

—

Ground terminal

34

ALRAM

—

Not used (open)

35

BAL B

O

Tracking balance adjustment control signal output to the CXA1782BQ (IC501)

36

CLOCK

O

Serial data transfer clock signal output to the CXD2508AQ (IC502)

37

XLAT

O

Serial data latch pulse signal output to the CXD2508AQ (IC502)

38

AC IN

I

AC IN detection signal input terminal (for AC IN check)    “H”: AC IN OK

39

SQCK

O

Clock signal output for subcode Q data reading to the CXD2508AQ (IC502)

40

P02

O

Not used (open)

41

SQSI

I

Subcode Q data input from the CXD2508AQ (IC502)

42

SENS

I

Internal status detection signal input from the CXD2508AQ (IC502)

43

C IN

I

Track jump count signal input from the CXD2508AQ (IC502)

44

SCOR

I

Subcode sync (S0+S1) detection signal input from the CXD2508AQ (IC502)

45

DOOR

I

CD lid open/close detect switch (S420) input terminal    “L”: open, “H”: close

46

DATA

O

Serial data output to the CXD2508AQ (IC502)

47

XRESET

O

Reset signal output to the CXA1782BQ (IC501) and CXD2508AQ (IC502)    “L”: reset

48

AU MUT

O

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

49

BUZZER

O

Beep sound output terminal

50

RADIO ON

O

Radio system power on/off control signal output terminal    “L”: radio on

51

KEY IN1

I

Key input terminal    WAKE UP  TRACK key input (S401)

52

KEY IN2

I

Key input terminal    ALARM MODE key input (S402)

53

KEY IN3

I

Key input terminal    ALARM  B key input (S403)

54

VDD

—

Power supply terminal (+5V)

55

XT1

I

Sub system clock input terminal (32 kHz)

56

XT2

O

Sub system clock output terminal (32 kHz)

57

NC

—

Connected to power supply (+5V)

58

X1

I

Main system clock input terminal (4.19 MHz)

59

X2

O

Main system clock output terminal (4.19 MHz)

60

KEY IN4

I

Key input terminal    RADIO  SLEEP key input (S404; main unit, S702; remote control unit (RM-
RW1))

61

KEY IN5

I

Key input terminal    TIME SET/TRACK +  

+ key input (S405)

Power on/off control signal output and CD test mode 1 setting terminal
At initial mode: valid/invalid selection of the CD test mode 1 (CD test mode 1 when “L” input)
At normal mode: main power on/off control signal output (power on when “L” output)

Power on/off control signal output and CD test mode 2 setting terminal
At initial mode: valid/invalid selection of the CD test mode 2 (CD test mode 2 when “L” input)
At normal mode: CD power on/off control signal output (power on when “L” output)

– 35 –

Pin No.

Pin Name

I/O

Function

62

KEY IN6

I

Key input terminal    ALARM  A key input (S406)

63

KEY IN7

I

Key input terminal    CD 

( P key input (S407; main unit, S701; remote control unit (RM-

RW1))

64

KEY IN8

I

Key input terminal    TIME SET/TRACK –  

= key input (S408)

65

KEY IN9

I

Key input terminal    TRACK/CLOCK key input (S409)

66

KEY IN10

I

Key input terminal    OFF  ALARM RESET key input (S410; main unit, S703; remote control 
unit (RM-RW1))

67

KEY IN11

I

Key input terminal    SNOOZE/SLEEP OFF key input (S411; main unit, S704; remote control 
unit (RM-RW1))

68

RESET

I

System reset signal input from the reset signal generator (IC402)    “L”: reset                                   
“L” is input for several 100 msec after power on, then it changes to “H”

69

S0

O

Segment drive signal output terminal    Not used (open)

70 to 80

S1 to S11

O

Segment drive signal output to the liquid crystal display (LCD901)