CDX-A250, CDX-A250EE - Sony Car Audio Service Manual (repair manual). Page 33

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33
CDX-A250/A250EE
Pin No.
Pin Name
I/O
Pin Description
52
KEY ACK
I
Key acknowledgment detect signal input
53
TU ATT IN
I
Tuner mute zero cross detect signal input (AEP, UK model only)
54
BU IN
I
Back-up power supply detect signal input
55
NCO
O
Not used. (Open)
56
DAVN
I
RDS data block synchronized detect signal input (AEP, UK model only)
57
NCO
O
Not used. (Open)
58
UNISI
I
SONY bus data signal input
59
UNI SO
O
SONY bus data signal output
60
UNI SCK
O
SONY bus clock signal output
61
611 SEL
I
Mechanism deck select signal input
62
WMA
I
WMA select signal input
63
NCO
O
Not used. (Open)
64
SIRCS
I
Remote control signal input
65 to 67
NCO
O
Not used. (Open)
68
FLASH W
I
Memory mode select signal input
69, 70
NCO
O
Not used. (Open)
71
RC IN1
I
Rotary commander shift key signal input
72
ACC IN
I
Accessory power supply detect signal input
73
TEST IN
I
Test mode detect signal input
74
TEL ATT
I
Telephone attenuate detect signal input
75
NCO
O
Not used. (Open)
76
XKEY ON
O
A/D converter power supply control signal output
77
RESET
I
CPU reset signal input
78
NCO
O
Not used. (Open)
79
XOUT
O
Sub-clock output (32.768 kHz)
80
XIN
I
Sub-clock input (32.768 kHz)
81
VSS1
Ground pin
82
OSC IN
I
Main-clock input (3.68 MHz)
83
OSC OUT
O
Main-clock output (3.68 MHz)
84
VCC3
Power supply pin (+3.3 V)
85
DEMOSEL
I
DEMO select signal input
86
ATT
O
Audio mute control signal output
87
BUS ON
O
Bus on signal output
88
SYS RST
O
System reset signal output
89
EJECT OK SW
O
Eject OK signal output
90 to 92
NCO
O
Not used. (Open)
93
Z-MUTE
I
CD zero cross mute detect signal input
94 to 97
NCO
O
Not used. (Open)
98
CD ON
I
CD mechanism power control request signal input
99
CDM ON
I
CD mechanism deck power control request signal input
100
NCO
O
Not used. (Open)
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