CDX-T70MXDC - Sony Car Audio Service Manual (repair manual). Page 34

34

55, 56

MD0, MD1

I

Setting terminal for the CPU operational mode    "H": single chip mode (fixed at "H" in this set)

57

OSC2

O

Sub system clock output terminal    Not used

58

OSC1

I

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

59

RES

I

System reset signal input from the SONY bus interface and reset signal generator    "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"

60

NMI

O

Not used (fixed at "H")

61

STBY

O

Standby mode control signal output terminal    Not used (fixed at "H")

62

VCC

-

Power supply terminal (+3.3V)

63

XTAL

I

Main system clock input terminal (12.288 MHz)

64

VSS

-

Ground terminal

65

EXTAL

O

Main system clock output terminal (12.288 MHz)

66

FWE

I

Flash memory data write enable signal input terminal

67

MD2

I

Setting terminal for the CPU operational mode    "H": single chip mode (fixed at "H" in this set)

68

FL BOOT

I

Flash memory data write control signal input terminal    "L" active

69

FL W

O

Flash memory data write control signal output (connecting FWE (pin 66))

70, 71

NC

O

Not used

72

MGLK-SW

I

Magazine in/out detect switch input terminal    "L": magazine in

73

DECINT

I

Interrupt signal input from the CD-ROM/MP3 decoder

74

NC

O

Not used

75

EJECT

I

Eject switch input terminal    "L" active

76

SO

O

Serial data output to the SONY bus interface

77

SI

I

Serial data input from the SONY bus interface

78

SCLK

I

Serial data transfer clock signal input from the SONY bus interface

79

EEDATA

I/O

Two-way data bus with the EEPROM

80

SDA

I/O

I2C interface data input/output with the CD-ROM/MP3 decoder

81

SCL

O

I2C interface data transfer clock signal output to the CD-ROM/MP3 decoder

82

EECLK

O

Serial data transfer clock signal output to the EEPROM

83

NC

O

Not used

84

SQSO

I

Subcode Q data input from the DSP

85

SQCK

O

Subcode Q data reading clock signal output to the DSP

86 to 89

NC

O

Not used

90

R/RW SEL

O

CD-ROM/RW selection signal output    "L": CD-RW, "H": CD-ROM

91

BUSON

I

Bus on/off control signal input from the SONY bus interface    "L": bus on

92

BUCHK

I

Battery detection signal input    "H": low battery (Normally: "L")

93, 94

NC

O

Not used

95

LOADF

O

Motor drive signal (load chucking direction) output to the chucking motor drive

96

LOADR

O

Motor drive signal (save direction) output to the chucking motor drive

97

SINGLE

I

Setting terminal for the single disc/multiple discs mode
"L": single disc mode, "H": multiple discs mode (fixed at "H" in this set)

98

LOAD SW

I

Chucking end detect switch input terminal
"L": When completion of the disc chucking, loading or save operation

99

SAVE SW

I

Chucking end detect switch input terminal
"L": When completion of the disc chucking, loading or save operation

100

LIM SW

I

Sled limit in detect switch input terminal
"L": When the optical pick-up is inner position