CDP-EX880, CDP-MS717, DHC-EX880MD, DHC-MD717 - Sony Audio Service Manual (repair manual). Page 26

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Pin No.

Pin Name

I/O

Function

39

X1

I

Main system clock input terminal (12.5 MHz)

40

VSS

—

Ground terminal

41

XT2

O

Sub system clock output terminal    Not used (open)

42

XT1

I

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

43

RESET

I

System reset signal input from the reset signal generator (IC311)    “L”: reset                                   
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

44

BUSCLK

O

Bus data transfer clock signal output for the system control bus

45

BUSBSY

I/O

Busy signal in/out terminal for the system control bus

46

SCOR

I

Subcode sync (S0+S1) detection signal input from the CXD2519Q (IC103) in BD section

47

DQSY

I

Data read enable signal input from the CD text decoder (IC104) in BD section

48

NC

O

Not used (open)

49

JOG0

I

Jog dial pulse (0) input from the rotary encoder (S661) (for SELECTOR)

50

JOG1

I

Jog dial pulse (1) input from the rotary encoder (S661) (for SELECTOR)

51

AVDD

—

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

52

AVREF0

I

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

53

KEY0

I

Key input terminal (A/D input) (S611 to S613, S616 and S618)                                                         
CD1 to CD3, REPEAT, CLEAR keys input

54

KEY1

I

Key input terminal (A/D input) (S621 to S623, S626 to S628)                                                           
§ (CD1 to CD3), MENU/NO, ENTER/YES, DISC SKIP keys input

55

KEY2

I

Key input terminal (A/D input) (S631 to S638)                                                                                   
fl, p, 0, ), DISPLAY, CONTINUE, SHUFFLE, PROGRAM keys input

56

SELECT0       

(CDTEXT)

I

Input terminal for the Japanese letter in function setting                                                                     
“L”: input possible (fixed at “H” in this set)

57

SELECT1      

(MECHA MODEL)

I

Input terminal for the separate/complete type setting of CD section and other sections                     
“L”: separate type, “H”: complete type (fixed at “L” in this set)

58

DISC SNS

I

Detection input from the disc in detect sensor (Q501)    “H”: disc in

59

MID SNS

I

Detection input from the disc tray close detect sensor (IC501)    “H”: disc tray is closed

60

(GND)

I

Not used (fixed at “L”)

61

AVSS

—

Ground terminal (for A/D converter)

62

TEST

I

Input terminal for the test (fixed at “L” in this set)

63

NC

O

Not used (open)

64

AVREF1

I

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

65

SRDT

I

Serial data input from the CD text decoder (IC104) in BD section

66

NC

O

Not used (open)

67

SCLK

O

Serial data transfer clock signal output to the CD text decoder (IC104) in BD section

68

SUBQ

I

Subcode Q data input from the CXD2519Q (IC103) in BD section

69

NC

O

Not used (open)

70

SQCLK

O

Subcode Q data reading clock signal output to the CXD2519Q (IC103) in BD section

71

XMODE

O

Reset/power down mode setting signal output to the CD text decoder (IC104) in BD section

72

SENSE2

I

Internal status monitor input from the CXA1992AR (IC101) in BD section

73

SENSE

I

Internal status monitor input from the CXD2519Q (IC103) in BD section

74

DRV DAT

O

Serial data output to the fluorescent indicator tube driver (IC601) and LED driver (IC602)

75

DRV CLK

O

Serial data transfer clock signal output to the fluorescent indicator tube driver (IC601) and LED 
driver (IC602)

76 to 83

A0 to A7

O

Address signal output to the S-RAM (IC315)

84 to 91

D0 to D7

I/O

Two-way data bus with the S-RAM (IC315)

92 to 98

A8 to A14

O

Address signal output to the S-RAM (IC315)

99

NC

O

Not used (open)

100

VSS

—

Ground terminal