Pin
No.
Port Description I/O (V)
FM AM CD
51 DCDC
CONT
Not connected - - - -
52 FP
MOTOR1
Open/Close of
Front panel 1
O 4.9 5.0 4.9
53 FP
MOTOR2
Open/Close of
Front panel 2
O 4.9 5.0 4.9
54 V CONT1 Reference voltage
control for motor
driver
O 0 0 5.0
55 REMO 1 Remote control data I 5.0 5.0 5.0
56 SA CLK Spectrum analyzer
clock
O 5.0 5.0 4.9
57 EXT
MUTE
Pulled up to H I 5.3 5.2 5.2
58 AMP
CONT
Power control for
external Amplifier
O 4.9 5.0 4.9
59 BZ OUT Buzzer signal O 0 0 0
60 NC Not connected - - - -
61 WOW
MODE1
SRS WOW mode 1
(C8403U only)
O 0 0 0
62 WOW
MODE2
SRS WOW mode 2
(C8403U only)
O 0 0 0
63 WOW
MODE3
SRS WOW mode 3
(C8403U only)
O 0 0 0
64 DIM1 Not connected - - - -
65 DIM2 Not connected - - - -
66 MAIN
CNT2
Power control for
Hub
O 5.0 5.0 5.0
67 SRC KEY SOURCE key
detection
I 5.0 4.9 5.0
68 PANEL IN Panel attachment
detection
I - - -
69 RDS CLK
RDS clock input INT
2.6 0 2.6
70 NC Not connected - - - -
71 RDS
DATA
RDS data input
I 2.6 0.2 2.9
72 MAIN
CONT
Main power control O 4.9 4.9 4.9
73 INV CONT Dimmer power
control
O 5.0 5.0 5.0
74 AF MUTE Audio mute O 5.0 5.0 5.0
75 RESET Reset I 5.0 5.0 5.0
76 FOCUS
ELV
Focus elevation for
SRS WOW (C8403U
only)
O - - -
77 X1A Oscillator clock O 2.1 2.1 2.1
78 X0A Oscillator clock I 1.6 1.6 1.6
79 Vss GND - 0 0 0
Pin
No.
Port Description I/O (V)
FM AM CD
80 X1 Crystal oscillator
clock
I 2.0 2.0 2.0
81 X2 Crystal oscillator
clock
O 2.5 2.5 2.5
82 Vdd +5V power supply - 5.0 5.0 5.0
83 P00 Pulled down to L - 0 0 0
84 P01 Pulled up to H - 5.1 5.0 5.1
85 OFFSET
DET
Audio clipping level
detection from
Power amp.
I 0 0 0
86 STBY Standby for Power
amp.
O 5.0 5.0 5.0
87 AMP
MUTE
Mute for Power
amp.
O 0 0 0
88 ILL SENS Pulled up to H - 5.0 5.0 5.0
89 HB AM
H-IC analog mode
select
O 5.2 5.2 0
90 EP DO
EPROM comuni.
data input
O/I
0 0 0
91 EP DI (NC) Not connected - - - -
92 EP SK
(NC)
Not connected - - - -
93 SUB
RESET
Reset for display
CPU
O 4.9 5.0 4.9
94 DISPM
CONT
5V power control
for Display
O 0 0 0
95 NC Not connected - - - -
96 NC Not connected - - - -
97 NC Not connected - - - -
98 S LED Security LED drive O 0 0 5.0
99 ANT
CONT
Power control for
antenna motor
O 5.2 5.2 5.2
100
EP CS
EPROM chip select
I 0 0 0
9