Sony MZ-R90/R91 User Manual

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Pin No.

Pin Name

I/O

Pin Description

43

XRST

I

System reset signal input from the MPC18A31FTA (IC901)     “L”: reset

For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

44

VSS

—

Ground terminal

45

XTAL

O

Main system clock output terminal (16.9344 MHz)

46

EXTAL

I

Main system clock input terminal (16.9344 MHz)

47

VDD

—

Power supply terminal (+2.4 V)

48

TSB SLV CTL

I/O

Two-way control signal bus with TSB slave circuit     Not used (open)

49

SPDL START SW

O

Spindle servo start switching signal output to the analog switch (IC504, 505)

50

OPEN CLOSE SW

I

Upper panel open/close detect switch (S801) input terminal (A/D input)

“L”: upper panel close, “H”: upper panel open

51

XSHOCK

I

Recording shock detect signal input from the CXD2660GA (IC502)

52

FOK

I

Focus OK signal input from the CXD2660GA (IC502)   “H”: is input when focus is on (“L”: NG)

53

SQSY

I

Subcode Q sync (SCOR) input from the CXD2660GA (IC502)

“L” is input every 13.3 msec     Almost all, “H” is input

54

DQSY

I

Digital In U-bit CD format subcode Q sync (SCOR) input from the CXD2660GA (IC502)

“L” is input every 13.3 msec     Almost all, “H” is input

55

XINT

I

Interrupt status input from the CXD2660GA (IC502)

56

T.MARK

I

T MARK switch (S803) input terminal

57

REC WBL SW

O

Stable control signal is output when recording

58

SERON

O

Series power supply control signal output to the MPC18A31FTA (IC901)

59

XCHG

O

Charge control signal output to the MPC18A31FTA (IC901)

60

XTEST

I

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

61

SET CODE0

I

Destination setting terminal for the test mode

62

SET CODE1

I

Destination setting terminal for the test mode     Not used (open)

63

SET CODE2

I

Destination setting terminal for the test mode

64

REG CTL PWM

O

Synchronizing external clock signal output to the MPC18A31FTA (IC901)

65

VRM PWM

O

VREM power supply voltage control PWM signal output to the MPC18A31FTA (IC901)

66

VC PWM

O

System power supply voltage control PWM signal output to the MPC18A31FTA (IC901)

67

SPDL PWM

O

Spindle servo drive voltage control PWM signal output to the MPC17A56FTA (IC901)

68

XIC RST

O

Reset signal output to the A/D, D/A converter (IC301), SN761056ADBT (IC501) and

CXD2660GA (IC502)     “L”: reset

69

REC LED

O

REC LED drive signal output terminal     Not used (open)

70

SI1

I

Joint text data input from the remote commander with headphone

71

SO1

O

Joint text data output to the remote commander with headphone     Not used (open)

72

SCK1

O

Joint data communication clock output to the remote commander with headphone

Not used (open)

73

XHOLD SW

I

HOLD switch (S804) input terminal     “L”: hold on, “H”: hold off

74

VDD

—

Power supply terminal (+2.4 V)

75

TEX

I

Sub system clock input terminal     Not used (open)

76

TX

O

Sub system clock output terminal     Not used (open)

77

VSS

—

Ground terminal

78

VBKAN

I

Sub power supply input terminal

79

S MON

I

Servo signal monitor input from the SN761056ADBT (IC501) (A/D input)

80

VB MON

I

Un-regulator power supply voltage monitor input terminal (A/D input)

81

CHG MON

I

Rechargeable battery voltage monitor input from the MPC18A31FTA (IC901) (A/D input)

82

VREF MON

I

Reference voltage monitor input from the SN761056ADBT (IC501) (A/D input)

83

WK DET

I

Set key starting detect signal input terminal (A/D input)

84

HALF LOCK SW

I

Open knob detect switch (S802) input terminal     “L”: normal position, “H”: open knob slid

85

RMC KEY

I

Remote commander with headphone key input terminal (A/D input)

86

SET KEY 1

I

Set key input terminal (A/D input)     (x, >, ., VOL +/– keys input)