6
KDC-BT40U/BT645U
KDC-U546BT
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No.
Pin Name
I/O
Application
Truth Value
Table
Processing / Operation / Description
47
S SOC CLK
I
Serial clock input from Bolero
48
NC
-
Not used
Output L
fi
xed
49
S SOC REQ
I
Communication request from mecha-
nism to system
μ
-com
50
CD LOS SW
I
CD loading detection
51
CD DISC12 SW
I
12cm disc detection
52
SOC MUTE
I
SOC mute request
L: Mute request, H: Normal
52
CD MUTE
I
CD mute request
L: Mute request, H: Normal
53
SOC RST
O
SOC reset
H: Normal, L: Reset
54
S SYS REQ
O
Communication request from system
μ
-com to mechanism
55
NC
-
Not used
Output L
fi
xed
56
CD MOTOR
O
CD motor control
q
Refer to the truth value table
57
CD LOEJ
I/O CD motor control
q
Refer to the truth value table
58
SOC S STOP
O
SOC stop
H: Normal, L: SOC stopped
59
CD LOE LIM SW
I
CD detection (Chucking SW)
H: Loading completed, L: No disc
60
VCC2
-
61
NC
-
Not used
Output L
fi
xed
62
VSS
-
63~65
NC
-
Not used
Output L
fi
xed
66
BT RST
O
Bluetooth module reset
L: Normal, H: Bluetooth reset
67
PON FL
O
Key illumination power supply control
H: ON, L: OFF
68
PS1 1
O
Power supply IC control
w
Refer to the truth value table
69
PS1 2
O
Power supply IC control
w
Refer to the truth value table
70
PS1 3
O
Power supply IC control
w
Refer to the truth value table
71
PS2 1
O
Power supply IC control
w
Refer to the truth value table
72
NC (PS2 2)
-
Not used
Output L
fi
xed
73
BU DET
I
Momentary power-down detection
BU found: L, No BU or momentary power-down: H
74
ACC DET
I
ACC power supply detection
ACC found: L, No ACC: H
75
AUD SDA
I/O I2C data input/output
MAX 400kHz
76
AUD SCL
I/O I2C clock input/output
MAX 400kHz
77
NC
-
Not used
Output L
fi
xed
78
FSEL
O
SW-REG frequency SW
H: 2.04MHz, L: 1.68MHz
79
PON SWREG
O
SW-REG ON/OFF
H: ON, L: OFF
80
LINE MUTE
I
Line mute detection
Normal: Below 2.5V, NAVI mute: Over 2.5V
81
TYPE 1
I
Destination SW
82
NC (TYPE 2)
-
Not used
Output L
fi
xed
83
PWIC DC ERR
I
Detection of power IC short-circuited
+B/GND
84
AUD DC ERR
I
DC offset detection
If DC offset is detected 20 times in 100ms with
condition below 1.0V, it will be judged as DC offset is
detected.
85
TUN SMETER
I
S-meter input
86
NC
-
Not used
Output L
fi
xed
