Read Sony NW-S21 / NW-S23 Service Manual online
19
NW-S21/S23
Pin No.
Pin Name
I/O
Description
143
AVDUO
—
Power supply terminal (+2.8V) (for sub system clock oscillator)
144
AVSPLL
—
Ground terminal (for PLL)
145
AVDPLL
—
Power supply terminal (+2.8V) (for PLL analog system)
146 to 153
PQ0 to PQ7
I/O
Not used
154
DVSS8
—
Ground terminal
155
VDIO7
—
Power supply terminal (+2.8V) (for I/O interface)
156
PR0
O
Address signal output to the liquid crystal display unit
157 to 159
PR1 to PR3
I/O
Not used
160
PR4
O
Liquid crystal display back light on/off control signal output to the EL driver
“H”: back light on
“H”: back light on
161 to 163
PR5 to PR7
I/O
Not used
164
DVSS9
—
Ground terminal
165
VDIOMS
—
Power supply terminal (+2.8V) (for memory stick interface)
166
MSDIO
I/O
Two-way data bus with the memory stick interface Not used
167
MSBS
O
Bus state signal output to the memory stick interface Not used
168
MSSCLK
O
Serial clock signal output to the memory stick interface Not used
169
XMSINS
I
Card detection signal input from the memory stick interface Not used
170, 171
PI7, PI0
I/O
Not used
172
PI1
O
LED drive signal output of the ACCESS indicator “H”: LED on
173
PI2
O
Liquid crystal display back light on/off control signal output to the EL driver
“H”: back light on
“H”: back light on
174
PI3
O
Power on/off control signal output for NAND flash memory “H”: power on
175
PI4
I/O
Not used
176
PI5
O
Reset signal output to the liquid crystal display unit “L”: reset
177
PI6
I
Not used
178
DVDD3
—
Power supply terminal (+1.2V)
179
DVSS5
—
Ground terminal
180
VDIO5
—
Power supply terminal (+2.8V) (for I/O interface)
181
PJ0
I/O
Not used
182
XRE
O
Read signal output to the NOR flash memory/S-RAM
183
XLB
O
Lower byte access strobe signal output to the NOR flash memory/S-RAM
184
XUB
O
Upper byte access strobe signal output to the NOR flash memory/S-RAM
185
XWE
O
Write signal output to the NOR flash memory/S-RAM
186
XCS0
O
Chip select signal output to the NOR flash memory
187
XCS1
O
Chip select signal output to the S-RAM
188
XBOOT
I
Boot mode selection signal input terminal Not used
189
XMS/SIO
I
Boot source selection signal input terminal Not used
190 to 193
PK4 to PK7
I/O
Not used
194
DVSS6
—
Ground terminal
195
VDIO6
—
Power supply terminal (+2.8V) (for I/O interface)
196 to 207
A0 to A11
O
Address signal output to the NOR flash memory/S-RAM
208
DVSS0
—
Ground terminal
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