7
KDC-BT6544U/BT6544UY
/BT7043U/BT742U
Pin No.
Pin Name
I/O
Application
Truth Value
Table
Processing / Operation / Description
42
ROTARY CCW
I
VOL key detection (Counterclockwise)
Detects pulse width
TDF: 15-pulse/360°, 2-click/1-pulse
43
NC
-
Not used
Output L
fi
xed
44
VFD CS
O
VFD control request
H: Possible to transfer VFD data
45
BT RST
O
Bluetooth module reset
L: Normal, H: Bluetooth reset
46
VFD INT
I
VFD-INT input
47
NC
-
Not used
Output L
fi
xed
48
PON PANEL
I/O Panel 5V power supply control
ON (For 11 minutes after ACC OFF): L
Momentary power-down or panel detached
or 11 minutes after ACC OFF: Hi-Z
49
PON
O
Power supply control
H: Power supply ON, L: Power supply OFF
50
CD DISC12 SW
I
12cm disc detection
51
CD LOS SW
I
CD loading detection
52
MECHA STOP
O
SOC (System On Chip) stop
H: Normal, L: SOC stopped
52
CD PON
O
CD mechanism power supply control
H: ON, L: OFF
53
CD MUTE
I
CD Mute request
L: Mute request, H: Normal
54
S MECHA REQ
I
Communication request from mechanism to system
μ
-COM
55
MECHA RST
O
SOC (System On Chip) reset
H: Normal, L: Reset
56
SRAMSTBY
O
Decoder SRAM standby control
H: SRAM standby
56
NC
-
Not used
Output L
fi
xed
57
CD LOE LIM
SW
I
CD detection (Chucking SW)
H: Loading completed, L: No disc
58
S SYS REQ
O
Communication request from system
μ
-COM to
mechanism
58
MDSP CE
O
Mechanism chip enable
59
PON ILL
O
Key illumination power supply control
H: Power supply ON, L: Power supply OFF
60
VCC2
-
61
DRV MUTE
O
CD motor driver mute output
62
VSS
-
63
TYPE 1
I
Destination SW
64
TYPE 2
I
Destination SW
65
NC
-
Not used
Output L
fi
xed
66
CD LOEJ
I/O CD motor control
q
Refer to the truth value table
67
CD MOTOR
O
CD motor control
q
Refer to the truth value table
68~70
NC
-
Not used
Output L
fi
xed
71
ILLUMI DET
I
Dimmer illumination detection
L: ON, H: OFF
72
ACC DET
I
ACC power supply detection
ACC found: L, No ACC: H
73
BU DET
I
Momentary power-down detection
BU found: L, Momentary power down: H
74
ANT CON
O
Power antenna control
Tuner ON: H
75
PCON
O
External power ampli
fi
er control
76
PWIC SVR
O
Power IC SVR discharge circuit control
H: ON, L: OFF
77
PWIC MUTE
O
Power IC mute control
78
PWIC STBY
O
Power IC standby control
79
LINE MUTE
I
Line mute detection
TEL mute: Below 1V, NAVI mute: Over 2.5V
MICROCOMPUTER’S TERMINAL DESCRIPTION
