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39
CDX-GT50W/GT500/GT500EE/GT550
Pin No.
Pin Name
I/O
Pin Description
52
KEYACK
I
Key acknowledgment detect signal input
53
TU ATTIN
I
Tuner mute zero cross detect signal input (AEP, UK model only)
54
BUIN
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
UNISO
O
SONY bus data signal output
60
UNISCK
O
SONY bus clock signal output
61
NCO
O
Not used. (Open)
62
NCO
O
Not used. (Open)
63
DOOR IND
O
CD IN LED control signal output H: On
64
SIRCS
I
Remote control signal input
65
NCO
O
Not used. (Open)
66
FSW OUT
O
D/D converter oscillater frequency shift control signal output
L: 300 kHz, H: 400 kHz
67
DISP FLASHW
I
Display IC flash ROM write signal input
68
FLASH W
I
Memory mode select signal input L: Write mode
69
NCO
O
Not used. (Open)
70
DOOR SW
I
Panel open/ close detect signal input H: Panel open
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
ILUIN
I
Auto dimmer illumination detect signal input H: Ill off
76
XKEYON
O
A/D converter power supply control signal output
77
RESET
I
CPU reset signal input
78
NCO
O
Not used. (Open)
79
XIN
I
Sub-clock input (32.768 kHz)
80
XOUT
O
Sub-clock output (32.768 kHz)
81
VSS1
—
Ground pin
82
OSC OUT
O
Main-clock output (18.432 MHz)
83
OSC IN
I
Main-clock input (18.432 MHz)
84
VCC3
—
Power supply pin (+3.3 V)
85
SEL2
O
Not used in this set. (Open)
86
SEL5
O
Not used in this set. (Open)
87
BUSON
O
Bus on signal output
88
SEL3
O
Not used in this set. (Open)
89
EJECT OK
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, 95
NCO
O
Not used. (Open)
96
CYRIL SEL
I
Cyril select signal input L: Cyril off, H: Cyril on
97
SEL4
O
Not used in this set. (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)
