7
KDC-348U/4751SD/BT41U/BT648U
/U4549/U4549SD/U549BT/X395/X695
Pin No.
Pin Name
I/O
Application
Truth Value
Table
Processing / Operation / Description
41
ZDET IN
I
0-bit mute request
H: Mute request, L: Normal play
42
CD RST
O
CD mechanism reset
H: Normal, L: Reset
43
CD CCE
O
CD mechanism chip enable
44
CD DRIVE MUTE O
CD motor driver mute output
45
CD MOTOR
O
CD motor switching control
q
Refer to the truth value table
46
NC
-
Not used
Output L
fi
xed
47
DVCC3
-
Power supply
48
DVSS
-
GND
49,50
NC
-
Not used
Output L
fi
xed
51
SD CD
I
SD card insert detection
L: SD found
52
SD PWR
I/O SD block power supply control
L: POWER ON, Hi-Z: POWER OFF
53
BT RST
O
BT module reset
L: BT reset, H: Normal
53
SD CS
O
CS output to SD
54~56
NC
-
Not used
Output L
fi
xed
57
PS1-1
O
Power supply IC control
w
Refer to the truth value table
58
PS1-2
O
Power supply IC control
w
Refer to the truth value table
59
PS1-3
O
Power supply IC control
w
Refer to the truth value table
60
PS2-1
O
Power supply IC control
w
Refer to the truth value table
61
NC
-
Not used
Output L
fi
xed
62
FSEL1
O
SW-REG frequency switching
63
NC
-
SW-REG frequency switching
Output L
fi
xed
64
PON SW-REG
O
SW-REG ON/OFF
L: OFF, H: ON
65
BT SYS DATA
O
Data output to BT
65
SD DO
O
Data output to SD
66
BT BT DATA
I
Data input from BT
66
SD DI
I
Data input from SD
67
SD CLK
O
Clock output to SD
68~70
NC
-
Not used
Output L
fi
xed
71
ILLUMI DET
I
Dimmer illumination detection
L: ON, H: OFF
72
BU DET
I
Momentary power-down detection
BU found: L,
No BU or momentary power down: H (Operates
less than 4ms after momentary power down)
73
ACC DET
I
ACC detection
ACC found: L, No ACC: H
74
NC
-
Not used
Output L
fi
xed
75
PON 4V-PRE
I/O 4V-PRE power supply control (eXcelon model)
H: ON, Hi-Z: OFF
76
SA RST
O
Reset output for spectrum analyzer
H: Reset cancelled, L: Reset
77
SA CLK
O
Clock output for spectrum analyzer
78
MUTE 0
O
Front direct mute
L: Mute ON (Time constant solo setting: 10ms),
H: Normal
79
MUTE 1
O
Rear direct mute
L: Mute ON (Time constant solo setting: 10ms),
H: Normal
80
MUTE 2
O
Other direct mute
L: Mute ON (Time constant solo setting: 10ms),
H: Normal (Countermeasure against IC2 shock
noise)
MICROCOMPUTER’S TERMINAL DESCRIPTION
