20
Pin No.
Pin Name
I/O
Pin Description
61
COLSW
I
Illumination color switch input (“L”: 2 colors, “H”: 1 color)
(Fixed at “L” in CDX-3900R/4000R, “H” in CDX-4000RX)
62
COLSEL
I
Illumination color select input (“L”: AMBER, “H”: GREEN) (Fixed at “L” in this set)
63
VSS
—
Ground
64
DAVN
I
Block synchronization detection input of RDS data.
65
FILE
I
Custom file setting input
66
TEXT
I
CD text setting input
67
NOSESW
I
Front panel attachment detection input
68, 69
—
—
Not used. (Open)
70
I2C SIO
I/O
I
2
C BUS serial data input/output
71
I2C CKO
I/O
I
2
C BUS serial clock input/output
72
—
—
Not used. (Open)
73
X1A
—
Low speed oscillation connecting pin (32.768 kHz)
74
X0A
—
Low speed oscillation connecting pin (32.768 kHz)
75
—
—
Not used. (Open)
76
KEYACK
I
Key acknowledge input
77
BUIN
I
Backup voltage detection input
78
ILLIN
I
Illumination (ILLIN) detection input (Fixed at “L” in this set)
79
TELATT
I
Telephone (TEL) detection input (Fixed at “L” in CDX-3900R)
80
—
—
Not used. (Open)
81
TEST IN
I
Test mode setting input
82
ACC IN
I
Accessory power supply (ACC) detection input
83
—
—
Not used. (Open)
84
LOCKIN
I
MD LOCK detection input
85
RCIN1
I
Rotary commander SHIFT input
86
HSTX
I
Hardware standby setting input
87
MD2
I
Connect to VSS in this set.
88, 89
MD1, 0
I
Connect to VCC in this set.
90
RSTX
I
Reset input
91
VSS
—
Ground
92
X0
—
High speed oscillation connecting pin (3.68 MHz)
93
X1
—
High speed oscillation connecting pin (3.68 MHz)
94
VCC
—
Power supply pin (+5 V)
95 – 97
—
—
Not used. (Open)
I
Dimmer select input (“L”: With dimmer select, “H”: Without dimmer select)
(Fixed at “L” in this set)
I
TAPE/CD select input (“L”: CD, “H”: TAPE) (Fixed at “L” in this set)
—
Not used. (Open)
—
Ground
O
System power control output
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