5
KDC-BT40U/BT645U
KDC-U546BT
MICROCOMPUTER’S TERMINAL DESCRIPTION
●
SYSTEM
μ
-COM : IC1 on X34- (ELECTRIC UNIT)
Pin No.
Pin Name
I/O
Application
Truth Value
Table
Processing / Operation / Description
1~3
NC
-
Not used
Output L
fi
xed
4
REMO
I
Remote control input
Detects pulse width
5
NC
-
Not used
Output L
fi
xed
6
BYTE
-
Setting of memory extension bus
Connects to VSS
7
CNVSS
-
Connects to VSS
H: Rewritable (Only when
fl
ash ROM is used)
8
XCIN
-
32.768kHz
9
XCOUT
-
32.768kHz
10
RESET
-
L: Reset
11
XOUT
-
16.0MHz
12
VSS
-
13
XIN
-
16.0MHz
14
VCC1
-
15
NC
-
Not used
Output L
fi
xed
16
LX REQ S
I
Communication request from slave unit
17
RDS CLK
I
RDS decoder clock input
18
PANEL DET
I
Panel communication detection
H: Panel detached, L: Panel attached
19~22
NC
-
Not used
Output L
fi
xed
23
RDS QUAL
I
RDS decoder quali
fi
cation input
24
F SYNC
-
Not used
Output L
fi
xed
25
RDS DATA
I
RDS decoder data input
26
BEEP
O
Beep output
2kHz / 1kHz
27
TUN SCL
I/O ATOMIC I2C clock output
28
TUN SDA
I/O ATOMIC I2C data input/output
29
VFD SYS DATA
O
VFD data output
Communication begins after 500ms after VFD_BLK
becomes Hi.
30
VFD PAN DATA
I
VFD data input
31
VFD CL
O
VFD clock output
125kHz
32
VFD BLK
O
VFD driver reset output
H: Reset canceled, L: Reset, Momentary power-down
or panel detached or 11 minutes after ACC OFF: L
33
BT SYS DATA
O
Data output to Bluetooth
34
BT BT DATA
I
Data input from Bluetooth
35
NC
-
Not used
Output L
fi
xed
36
ROTARY CW
I
VOL encoder input
Detects pulse width
37
ROTARY CCW
I
VOL encoder input
Detects pulse width
38
PON PANEL
I/O Panel 5V control
ON: L, Momentary power-down or panel detached or
11 minutes after ACC OFF: Hi-Z
39
EPM
I
Flash ROM EPM input
L: Rewritable (Only when
fl
ash ROM is used)
Connects to VSS
39
ROMCOR DET
I
E2PROM writing request
H: Writing
40~43
NC
-
Not used
Output L
fi
xed
44
VFD CE
O
VFD control request
45
S SYS DATA
O
Serial output to Bolero
46
S SOC DATA
I
Serial input from Bolero
