ICD-MS1 - Sony Audio Service Manual (repair manual). Page 27

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Pin No.

Pin Name

I/O

Description

116

VCC

—

Power supply terminal (+3.3V)

117

MODE2

I

Setting terminal for the CPU operational mode (fixed at “L” in this set)

118

MODE3

I

Setting terminal for the CPU operational mode (fixed at “L” in this set)

119

FWE

I

FWE control signal input terminal    “L” active
Connected to the FWECTL (pin ia) in this set

120

WAKEUP

I

Key interruption processing start signal output terminal

121

XRST

I

System reset signal input from the reset signal generator (IC726)    “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

122

VSS

—

Ground terminal

123

CKIO

I/O

Not used (open)

124

VCC

—

Power supply terminal (+3.3V)

125

XHSTBY

I

Not used (fixed at “H”)

126

XWDTOVF

O

Not used (open)

127

MODE4

I

Setting terminal for the CPU operational mode (fixed at “L” in this set)

128

MODE5

I

Setting terminal for the CPU operational mode (fixed at “L” in this set)

129

PLLVSS

—

Ground terminal (for PLL)

130

PLLCAP1

I

Connected to the external capacitor for PLL

131

PLLCAP2

I

Connected to the external capacitor for PLL

132

PLLVCC

—

Power supply terminal (+3.3V) (for PLL)

133

RXPROG

I

Not used

134

VSS

—

Ground terminal

135

XTAL32

O

Sub system clock output terminal    Not used (open)

136

EXTAL32

I

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

137

VCC

—

Power supply terminal (+3.3V)

138

TXPROG

O

Not used

139

KEYPUP

O

Key power control signal output terminal

140

VSS

—

Ground terminal

141

CK

—

Not used (open)

142

VCC

—

Power supply terminal (+3.3V)

143

VSS

—

Ground terminal

144

HPJACK

I

Earphone jack detection signal input terminal    “L”: earphone in

145

REDLED

O

LED drive signal output terminal of the rec indicator (D761 red)    “H”: LED on (rec mode)

146

GRNLED

O

LED drive signal output terminal of the play indicator (D761 green)
“H”: LED on (play mode)

147

XVORIN

I

Detect whether audio signal is entered or not input from the VOR detection circuit (IC163)
“L”: signal is entered, “H”: signal is not entered

148

RTCINTR

I

Not used

149

RTCINT1

I

Alarm interruption signal and regular period interruption signal input from the real time clock
(IC721)

150

XDCIN

I

DC power supply detection signal input terminal    “L”: DC power supply, “H”: dry battery

151

MSEJ

I

Memory stick insert detection signal input terminal
“L”: memory stick in, “H”: memory stick out

152

VSS

—

Ground terminal

153

XEPBUSY

I

Ready/busy detection signal input from the EEPROM (IC723)    “L”: busy

154

PULLUP

O

Power supply output terminal  (+3.3V)

155

PE22

O

Not used (open)

156

PE23

O

Not used (open)