Sony MZ-R90/R91 User Manual

Sony

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Pin No.

Pin Name

I/O

Pin Description

87

SET KEY 2

I

Set key input terminal (A/D input) (B, jog, END SEARCH keys input)

88

REC KEY

I

REC key input terminal

89

VRM MON

I

VREM voltage monitor input terminal (A/D input)

90

HIDC MON

I

HI-DC voltage monitor input terminal (A/D input)

91

AVSS

—

Ground terminal (for A/D converter)

92

AVREF

I

Input terminal for power supply voltage adjustment reference voltage (+2.4 V)

(for A/D converter)

93

AVDD

—

Power supply terminal (+2.4 V) (for A/D converter)

94

TEST0

I

Input terminal for the test (normally: fixed at “L”)

95

TEST1

I

Input terminal for the test (normally: fixed at “L”)

96

TDI

I

Input terminal for JTAG Not used (open)

97

TMS

I

Input terminal for JTAG Not used (open)

98

TCX

I

Input terminal for JTAG Not used (open)

99

XTRST

I

Input terminal for JTAG Not used (open)

100

TDO

I

Input terminal for JTAG Not used (open)

101

TSB CLKCTL

O

TSB clock control signal output terminal

102

SSB DATA

I/O

Two-way SSB serial data bus with the SN761056ADBT (IC501)

103

SBSB CLK

I

SSB serial clock signal output to the SN761056ADBT (IC501)

104

FLASH WR EN

—

Not used (fixed at “H”)

105

VDD

—

Power supply terminal (+2.4 V)

106

VSS

—

Ground terminal

107 to 109

VLC1 to VLC3

—

Power supply terminal for the liquid crystal display (+2.4 V)

110

XCS ADA

O

Chip select signal output to the A/D, D/A converter (IC301)

111

XPD ADA

O

Power supply control signal output to the A/D, D/A converter (IC301)

112

XRST MTR DRV

O

Reset signal output terminal “L”: reset Not used (open)

113

OPT DET

I

DIN plug detect signal input terminal

114

XJACK DET

I

LINE IN plug detect signal input terminal

115

XMIC DET

I

MIC plug detect signal input terminal

116

XOPT CONT

O

Power supply control signal output to the DIN plug laser diode

117

MUTE

O

Analog muting on/off control signal output terminal “L”: muting off, “H”: muting on

118

XHP STBY TMP

O

Power supply control signal output to the headphone amplifier Not used (open)

119

XCS NV

O

Chip select signal output to the EEPROM (IC802)

120

XINT REC SW

O

Not used (open)