6
KDC-BT6544U/BT6544UY
/BT7043U/BT742U
MICROCOMPUTER’S TERMINAL DESCRIPTION
●
SYSTEM
μ
-COM: IC302 on X34- (ELECTRIC UNIT)
Pin No.
Pin Name
I/O
Application
Truth Value
Table
Processing / Operation / Description
1
REMO
I
External remote control input and panel remote
control input
2
LX REQ M
O
Communication request to slave unit
3
B SYS DATA
O
Serial output to Bolero
4
B MECHA DATA
I
Serial input from Bolero
5
B MECHA CLK
I
Serial clock input from Bolero
6
BYTE
-
7
CNVSS
-
8
XCIN
-
Sub clock 32.768kHz
9
XCOUT
-
Sub clock 32.768kHz
10
RESET
-
11
XOUT
-
Main clock 12.00MHz
12
VSS
-
13
XIN
-
Main clock 12.00MHz
14
VCC1
-
15
NMI
-
16
LX REQ S
I
Communication request from slave unit
17
RDS CLK
I
RDS decoder clock input
(Terminal for European model)
18
PANEL DET
I
Panel connector detached/attached detection
H: Panel detached, L: Panel attached
19
PON AM
I/O AM power supply control
AM operated: H, AM not operated: Hi-Z
20
TUN IFC OUT
I
Front-end IFC-OUT input
H: Station found, L: No station
21
RDS AFS M
I/O Noise detection time constant SW
(Terminal for European model)
22
RDS QUAL
I/O RDS decoder quali
fi
cation input
(Terminal for European model)
23
RDS DATA
I
RDS decoder data input
(Terminal for European model)
24
V SYNC
-
Not used
Output L
fi
xed
25
NC
-
Not used
Output L
fi
xed
26
PWIC BEEP
O
Beep output
2kHz/1kHz (Model with Bluetooth)
27
TUN SCL
I/O Front-end I2C clock input/output
MAX 400kHz
28
TUN SDA
I/O Front-end I2C data input/output
29
VFD DATA
I/O VFD data input/output
30
ROTARY CW
I
VOL key detection (Clockwise)
Detects pulse width
TDF: 15-pulse/360°, 2-click/1-pulse
31
VFD CLK
O
VFD clock output
125kHz
32
VFD RST
O
VFD reset
H: Reset released, 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
35,36
NC
-
Not used
Output L
fi
xed
37
PON D5V
I/O SW-REG control
H: ON, Hi-Z: OFF
38
NC
-
Not used
Output L
fi
xed
39
ROMCOR DET
I
E2PROM writing request
H: Writing
40
PDN
O
Simple DSP power down
H: ON, L: OFF
41
DFZ MUTE
I
Mute request from simple DSP
L: Mute request
