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Port
Description
Pin
No.
38 RM
Remote control data
DATA
39 AF
AF mute control
MUTE
40 INV
Illumination control
CNT
41 (NC)
42 HUB
HUB ACC regulator
ACC
control
CNT
43 INI A
Mode setting A
44 INI B
Mode setting B
45 INI C
Mode setting C
46 CHSTB
CD changer strobe /
/
System upgrade ID4
SYSID4
47 CD
CD mute
MUTE
48 EVENT System upgrade
EVENT
49 HUB
HUB control signal
CNT
50 UART
UART serial data
RX
51 UART
UART serial data
TX
52 CD SI
CD data input
53 CD SO
CD data output
54 CD SCK CD clock
55 CD RST CD reset
56 CD STB CD strobe
57 (NC)
58 (NC)
59 AVREF (Conecting to +5V)
60 AVSS
Ground
61 ACC
ACC detection
62 (NC)
63 LEVEL
Audio level meter
signal
64 VSM
Radio signal
strength
65 (NC)
66 SCL
Audio control serial
clock
67 SDA
Audio control data
68 SD/ST
Radio station detect
69 MAIN
Main power control
CNT
I/O
FM AM CD
I
4.7 4.7 4.7
O 4.7 4.7 4.7
O 4.7 4.7 4.7
-
-
-
O
0
I
4.8 4.8 4.8
I
0
I
4.8 4.8 4.8
I
0
I
0
I
0
O 3.6 3.6 3.6
I
0
O 2.2
O
0
I
0
O 4.7 4.7 4.7
O 4.7 4.7 4.7
I
4.7 4.7 3.5
-
-
-
-
-
-
-
4.9 4.9 4.9
-
0
I
4.9 4.9 4.9
-
-
-
I
0
I
0
-
-
-
O 4.9 4.9 4.9
O 4.9 4.9 4.9
I
4.8 4.8 4.8
O 4.8 4.8 4.8
(V)
-
-
0
0
0
0
0
0
0
0
0
0
0
0
0
1.9
0
0
0
0.8
-
-
-
-
0
0
-
-
0
0
0
0
-
-
7
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