Read Sony CDX-GT610U / CDX-GT660U / CDX-GT660US Service Manual online
34
CDX-GT610U/GT660U/GT660US
51
MD2
I
Operation mode setting pin (Connect to VSS.)
52
KEYACK
I
Key acknowledgment detect signal input
53
TU ATTIN
I
Tuner mute zero cross detect signal input Not used in this set.
54
BUIN
I
Back-up power supply detect signal input
55
NCO
O
Not used. (Open)
56
DAVN
I
RDS (Radio Data System) data block synchronized detect signal input
Not used in this set.
57
NCO
O
Not used. (Open)
58
UNISI
I
SONY bus data signal input
59
UNISO
O
SONY bus data signal output
60
UNISCK
O
SONY bus clock signal output
61 to 63
NCO
O
Not used. (Open)
64
SIRCS
I
Remote control signal input
65
FL12V ON
O
12V power supply control signal output for fluorescent indicator tube
66
FSW OUT
O
D/D converter oscillator frequency shift control signal output
67
DD ON
O
3.3V D/D converter power on/off control signal output for fluorescent indicator tube
68
FLASH W
I
Memory mode change signal input Normally “H”: Single chip mode, after reset
“L”: flash write mode
69
NCO
O
Not used. (Open)
70
DOOR SW
I
Front panel open/close detect switch signal input
71
RC IN1
I
Rotary commander shift key signal input
72
ACC IN
I
Accessory power supply detect signal input
73
TESTIN
I
Test mode detect signal input
74
TELATT
I
Telephone attenuate detect signal input
75
ILLUIN
I
Illumination detect signal input “H”: Illumination off
76
AD 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
Low speed operation clock signal output (32.768 kHz)
80
XIN
I
Low speed operation clock signal input (32.768 kHz)
81
VSS1
—
Ground pin
82
OSCIN
I
High speed operation clock signal input (18.432 MHz)
83
OSCOUT
O
High speed operation clock signal output (18.432 MHz)
84
VCC3
—
Power supply pin (+3.3 V)
85
NCO
O
Not used. (Open)
86
ATT
O
Audio mute control signal output
87
BUSON
O
Bus on signal output
88
SYSRST
O
System reset signal output
89
EJECT OK SW
O
Eject OK signal output to CD mechanism unit
90
NCO
O
Not used. (Open)
91
WAKE UP
O
Mechanism microcomputer wake up signal output
92
NCO
O
Not used. (Open)
93
Z MUTE
I
Mute signal input
94
NCO
O
Not used. (Open)
95
DEMO SEL
I
DEMO select signal input “H”: DEMO on, “L”: DEMO off
96
CYRIL SEL
I
Cyril correspondence discrimination signal input “L”: No correspondence
97
NCO
O
Not used. (Open)
98
CD ON
I
CD mechanism servo power supply control request signal input
99
CDM ON
I
CD mechanism deck power supply control request signal input
100
OPEN MUTE
O
Not used. (Open)
Pin No.
Pin Name
I/O
Pin Description
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