Read Sony NW-S21 / NW-S23 Service Manual online
18
NW-S21/S23
Pin No.
Pin Name
I/O
Description
81
INT3
I
GROUP key input terminal
82
PF1
I/O
Not used
83
INT4
I
Play/stop key input terminal
84
PF3
O
Muting on/off control signal output to the headphone amplifier “L”: muting on
85
BEEP
O
Beep signal output terminal
86
PG0
I/O
Not used
87
INT5
I
HOLD key input terminal “L”: hold on
88, 89
PG2, PG3
I/O
Not used
90 to 93
TEST2, TEST3,
TEST0, TEST1
I
Input terminal for the test mode setting Not used
94
TACK
O
Bus response signal output terminal Not used
95
EVA
I
EVA/flash mode selection signal input terminal Not used
96
AVSAD
—
Ground terminal (for A/D converter)
97
AVDAD
—
Power supply terminal (+2.3V) (for A/D converter)
98 to 101
AN0 to AN3
I
Analog signal input terminal Not used
102, 103
AN4, AN5
I
Key input terminal (A/D input)
104, 105
INT8, INT9
I
Key wake up signal input terminal
106
XRST
I
System reset signal input terminal “L”: reset
107
RAMBK
I
RAM back up control signal input terminal Not used
108
VDBK
—
Power supply terminal (+1.2V) (for RAM back up)
109
TDI
I
Serial data input terminal (for JTAG) Not used
110
TMS
I
Test mode control signal input terminal (for JTAG) Not used
111
TCK
I
Serial clock signal input terminal (for JTAG) Not used
112
TRST
I
Reset signal input terminal (for JTAG) Not used
113
TDO
O
Serial data output terminal (for JTAG) Not used
114
VDIOJT
—
Power supply terminal (+2.8V) (for JTAG)
115
DVDD2
—
Power supply terminal (+1.2V)
116
DVSS4
—
Ground terminal
117
VDIO4
—
Power supply terminal (+2.8V) (for I/O interface)
118 to 125
PD0 to PD7
I/O
Not used
126
VBUS
I
USB power signal (USB connect detection signal) input from the USB connector
127
VDIOUS
—
Power supply terminal (+3.3V) (for USB transceiver)
128
UDM
I/O
USB data (–) input/output terminal
129
UDP
I/O
USB data (+) input/output terminal
130
TRON
O
UDP pull up resistor connect control signal output terminal
131
AVSDA
—
Ground terminal (for internal D/A converter)
132
VREFER
O
Reference voltage output terminal (R-ch)
133
AOUTR
O
Analog audio signal output to the headphone amplifier (R-ch)
134
AOUTL
O
Analog audio signal output to the headphone amplifier (L-ch)
135
VREFL
O
Reference voltage output terminal (L-ch)
136
AVDDA
—
Power supply terminal (+2.3V) (for internal D/A converter)
137
XTAL
O
Main system clock output terminal (22.5792 MHz)
138
EXTAL
I
Main system clock input terminal (22.5792 MHz)
139
AVDMO
—
Power supply terminal (+2.3V) (for main system clock oscillator)
140
AVSOSC
—
Ground terminal (for main and sub system clock oscillator)
141
TX
O
Sub system clock output terminal (20 MHz)
142
ETX
I
Sub system clock input terminal (20 MHz)
Click on the first or last page to see other NW-S21 / NW-S23 service manuals if exist.