6
KDC-237SA/237SAY
KDC-237SG/237SGY
Pin No.
Pin Name
I/O
Application
Truth Value
Processing Operation Description
Table
63
NC
-
Not used
Output L fixed
64
VSS
-
65
RDS AFS M
I/O
Noise detection time constant switching
w
Refer to the truth value table
66
TUN IFC OUT
I
Front-end IFC-OUT input
H: Station found, L: No station
67
PON EXT GND
I/O
IC2 external input quick charge control
L: OFF, Hi-Z: Quick charge, When IC2 is in source select:
Hi-Z, Mute L: L, Momentary power down/Power OFF: L
68
MUTE
I/O
Mute
L: Mute OFF, Hi-Z: Mute ON
69
ANALOG CON
O
AUX/LX audio switching
AUX: H (Switches after 100ms after first-out mute
begins to work), LX/Other source: L
70
LX RST
O
Forced reset to slave unit
H: Reset, L: Normal
71
LX CON
O
Start-up request to slave unit
H: Slave unit ON, L: Slave unit OFF
72
LX MUTE
I
Mute request from slave unit
H: Mute ON, L: Mute OFF
73
LX REQ M
O
Communication request to slave unit
74
RDS CLK
I
RDS decoder clock input
75
LX REQ S
I
Communication request from slave unit
Pull-down (GND)
76
PWIC SVR
O
SVR discharging circuit
During 500ms after momentary power down: H,
Since then: L
77
PWIC STBY
O
Power IC standby control
Power ON: H, Power OFF: L
78
PWIC MUTE
O
Power IC mute
STANDBY source/Momentary power down: L,
TEL mute: L
79
ACC DET
I
ACC power supply detection
ACC found: L, No ACC: H
BU found: L, No BU/Momentary power down: H
80
BU DET
I
Detection of momentary power down
(Operates after less than 4ms after momentary
power down is detected)
81,82
NC
O
Not used
Output L fixed
83
RDS NOISE
I
FM noise detection
84
TUN SMETER
I
S-meter input
85
TYPE1
I
Destination switching
e
Refer to the truth value table
86
TYPE2
I
Destination switching
e
Refer to the truth value table
87
PWIC DC DET
I
DC offset detection
If DC offset is found 20 times in 100ms with condition
of over 1.0V, it will be judged as DC offset detected.
88
LINE MUTE
I
Line mute selection
TEL mute: Below 1V, NAVI mue: Over 2.5V
89
OFFSET DET
I
Power IC offset detection
90
PS2 2
O
Power supply IC control
r
Refer to the truth value table
91
PS2 1
O
Power supply IC control
r
Refer to the truth value table
92
PS1 1
O
Power supply IC control
r
Refer to the truth value table
93
PS1 2
O
Power supply IC control
r
Refer to the truth value table
94
PS1 3
O
Power supply IC control
r
Refer to the truth value table
95
PON
-
Not used
POWER ON: H, POWER OFF: L
MICROCOMPUTER’S TERMINAL DESCRIPTION
