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3 7 63 1515 0
Pin No.
56
57
58
59
60
61
62
63
64
65
66
67
68
FM ON/AM ON
69
70
71
72
73
74
75
76
77
78
79
TE
L 13942296513
80
81
82
83
84
85
86
87
88, 89
90
91
92
93
94
95
COM8V ON
96
97
98
99
100
101
102, 103
104
www
105
106, 107
108
.
109
110
111
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Pin Name
I/O
AMP ON
O
Power amplifier power control output
TXT ON
O
Reset output to CD-TEXT decoder IC.
VOL ATT
O
Electric volume mute control output
NIL
—
Not used. (Open)
ATT
O
System attenuate control output
RC IN1
I
Rotary commander shift key input 1
TU ATT
O
Tuner attenuate output (Not used in this set.)
VSS
—
Ground
NIL
—
Not used. (Open)
SSTOP
I
IF counter result signal detection input of PLL.
TEST
I
Test mode initial setting detection input
DAVN
I
RDS IC data acquisition detection input (Fixed at "L" in this set.)
O
FM ON output
TU ON
O
Tuner power control output
2
SDA
I/O
I
SCL
O
I
2
NOSE2
I
Front panel OPEN detection input (Not used in this set.)
X1A
O
Sub ceramic oscillator output (32 kHz)
X0A
I
Sub ceramic oscillator input (32 kHz)
SCOR
I
SCOR signal detection input
BU IN
I
Backup power detection input
DQSY
I
CD-TEXT data setting completion signal detection input
CD SENS
I
CD SENS signal detection input
KEY ACK
I
Key input acknowledge
TEL ATT
I
Telephone attenuate detection input
ST/MONO
I/O
Tuner stereo signal detection input/forced monaural output
SEEKOUT
O
SEEK output
SD IN
I
Signal detector input
WIDE
O
WIDE/NARROW select output (Not used in this set.)
NARROW
O
WIDE/NARROW select output (Not used in this set.)
Hardware standby input (Connect to pin (º (RESET).)
HSTX
—
MD2
—
Operation mode input (Connect to ground in this set.)
MD1, 0
—
Operation mode input (Connect to VCC in this set.)
RESET
I
Reset input
VSS
—
Ground
X0
I
Main ceramic oscillator input (4.19 MHz)
X1
O
Main ceramic oscillator output (4.19 MHz)
VCC
—
Power supply pin (+5 V)
O
COM 8V control output
NIL
—
Not used. (Open)
AREA1
I
Destination select input 1 (Fixed at "L" in this set.)
AREA2
I
Destination select input 2 (Fixed at "L" in this set.)
AREA3
I
Destination select input 3 (Fixed at "L" (CDX-C6750) or "H" (CDX-C7500) in this set.)
BAND
I
Frequency select input (CDX-C7500 only)
ACC IN
I
Accessory power detection input
PH3, 2
I
Disc insertion detection photo sensor input (Not used in this set.)
LCD CE
O
LCD chip enable output
FLS W
I
Flash write input (Fixed at "H" in this set.)
x
ao
y
RE IN0, 1
I
Rotary encoder input
ILL ON
O
Illumination power control output
i
PW ON
O
System power control output
NIL
—
Not used. (Open)
ANT REM
O
ANT REMOTE power control output
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8
C BUS serial data input/output
C BUS serial clock output
Q Q
3
6 7
1 3
u163
.
– 21 –
2 9
9 4
2 8
Pin Description
1 5
0 5
8
2 9
9 4
m
co
9 9
2 8
9 9
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