Pin No.

Pin Name

I/O

Description

 

 

 

 

97

TMS

I

Test mode control signal input terminal for JTAG scan test Not used (open)

 

 

 

 

 

98

TCX

I

Clock signal input terminal for JTAG scan test

Not used (open)

 

 

 

 

 

99

XTRST

I

Reset signal input terminal for JTAG scan test

Not used (fixed at “L”)

 

 

 

 

100

TDO

O

Data output terminal for JTAG scan test Not used (open)

 

 

 

 

 

101

NC

O

Not used (open)

 

102

SSB DATA

I/O

Two-way SSB serial data bus with the SN761056CDBT (IC501)

103

SSB CLK

O

SSB serial clock signal output to the SN761056CDBT (IC501)

 

 

 

 

104

FLASH WR EN

I

Write enable signal input terminal Not used (fixed at “H”)

 

 

 

 

 

105

VDD

Power supply terminal (+2.4V)

 

 

 

 

 

 

106

VSS

Ground terminal

 

 

 

 

 

 

107 to 109

VLC1 to VCL3

I

Not used (fixed at “H”)

 

110 to 115

SEG0 to SEG5

O

Segment drive signal output to the liquid display module (LCD901)

116

DBB0

I

Set switch (S806) input terminal (A/D input) (DIGITAL SOUND PRESET switch 1 input)

 

 

 

 

117

DBB1

I

Set switch (S806) input terminal (A/D input) (DIGITAL SOUND PRESET switch 2 input)

 

 

 

 

 

118

XAVLS

I

Set switch (S807) input terminal (A/D input)

(AVLS switch input) “L”: limit

 

 

 

 

119

XCS NV

O

Chip select signal output to the EEPROM (IC802)

 

 

 

 

 

120

NC

O

Not used (open)

 

– 46 –

Page 36
Image 36
Sony MZ-E800 service manual SSB Data, Ssb Clk, Flash WR EN, DBB0, DBB1, Xavls, Xcs Nv